Current Search: Discrimination (x)
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Pages
- Title
- Does gender bias influence awards given by societies?.
- Creator
- Holmes, M. A., Asher, P., Farrington, J., Fine, R., Leinen, M. S., Leboy, P., Harbor Branch Oceanographic Institute
- Date Issued
- 2011
- PURL
- http://purl.flvc.org/fau/3340529, http://purl.flvc.org/FCLA/DT/3340529
- Subject Headings
- Gender discrimination, Professional associations, Awards, Sex discrimination
- Format
- Document (PDF)
- Title
- The role of organized labor in education for racial understanding.
- Creator
- Weaver, George
- Date Issued
- 1944
- PURL
- http://purl.flvc.org/FCLA/DT/3332850
- Subject Headings
- Race discrimination -- United States.
- Format
- Document (PDF)
- Title
- RELATIONAL TRAINING ON A DIMENSION AND ITS EFFECT ON TRANSPOSITION BEHAVIOR ON AN ORTHOGONAL DIMENSION.
- Creator
- POMEROY, MICHAEL LEE., Florida Atlantic University
- Abstract/Description
-
An attempt was made to investigate the abstract concept of relation. It was hypothesized that the learning of the relational concept independent of particular stimuli or dimensions is possible even in nonverbal animals. One group of rats was trained on a discrimination that could only be solved with relational learning; a second group of rats was trained on a discrimination that could be solved only with absolute learning. Both groups were then trained on a discrimination that could be...
Show moreAn attempt was made to investigate the abstract concept of relation. It was hypothesized that the learning of the relational concept independent of particular stimuli or dimensions is possible even in nonverbal animals. One group of rats was trained on a discrimination that could only be solved with relational learning; a second group of rats was trained on a discrimination that could be solved only with absolute learning. Both groups were then trained on a discrimination that could be learned in either a relational or absolute manner, and transposition testing was done to determine the method utilized. Results indicated animals with original relational learning solved the second discrimination relationally; animal s with original specific learning solved the second discrimination in an absolute manner.
Show less - Date Issued
- 1974
- PURL
- http://purl.flvc.org/fcla/dt/13671
- Subject Headings
- Relationism, Discrimination learning
- Format
- Document (PDF)
- Title
- TRANSPOSITION: A FURTHER TEST OF ABSOLUTE VERSUS RELATIONAL PREDICTIONS.
- Creator
- BIZAILLON, PAUL DUNN., Florida Atlantic University, Adamson, Robert E.
- Abstract/Description
-
An attempt was made to investigate the intradimensional transfer of a simultaneously presented, double brightness discrimination in male hooded rats. It was hypothesized that in a paradigm designed to emphasize interstimulus cues over individual stimulus cues, subjects would exhibit transposition in testing, even when this involved approaching a previously negative stimulus, and avoiding a previously positive stimulus, under extinction conditions. Results of two tests (with a partial...
Show moreAn attempt was made to investigate the intradimensional transfer of a simultaneously presented, double brightness discrimination in male hooded rats. It was hypothesized that in a paradigm designed to emphasize interstimulus cues over individual stimulus cues, subjects would exhibit transposition in testing, even when this involved approaching a previously negative stimulus, and avoiding a previously positive stimulus, under extinction conditions. Results of two tests (with a partial reinforcement retraining session between them) indicated significant transposition on all measures except trial of first choice on Test I for the group trained to approach the brighter stimulus in any pair presented. Results were interpreted as being in support of relational theory which stresses the importance of dimensional salience in the establishment of relational responding.
Show less - Date Issued
- 1975
- PURL
- http://purl.flvc.org/fcla/dt/13749
- Subject Headings
- Brightness perception, Discrimination learning
- Format
- Document (PDF)
- Title
- FACE-SENSITIVE EVENT-RELATED POTENTIALS: AGE-RELATED CHANGES, RACE EFFECT, CONTACT, AND IMPLICIT BIAS.
- Creator
- Molina, Karla Patricia Molina Valenzuela, Anzures, Gizelle, Florida Atlantic University, Department of Psychology, Charles E. Schmidt College of Science
- Abstract/Description
-
Early face-sensitive event-related potentials (ERPs) are modulated by age and race-of-face. Individual differences in implicit bias and race experience influence such race effects, but this remains largely unexplored. Thus, we examined children’s and adults’ P100s and N170s to own- and other-race faces and their relation with race experience and implicit racial bias. Children showed larger and more delayed P100s and N170s than adults. Also, 8- to 10-year-olds displayed earlier P100s to other...
Show moreEarly face-sensitive event-related potentials (ERPs) are modulated by age and race-of-face. Individual differences in implicit bias and race experience influence such race effects, but this remains largely unexplored. Thus, we examined children’s and adults’ P100s and N170s to own- and other-race faces and their relation with race experience and implicit racial bias. Children showed larger and more delayed P100s and N170s than adults. Also, 8- to 10-year-olds displayed earlier P100s to other-race faces, while 5- to 7- year-olds showed earlier left N170s to own-race faces. In adults, greater own-race experience was associated with delayed left N170s to own-race faces. Greater own-race bias was associated with earlier right P100s to own-race faces in 5- to 7-year-olds and smaller left P100 to N170 peak-to-peak amplitudes to own-race faces in 8- to 10-yearolds. Individual differences in age, race experience, and implicit racial bias should be considered when examining ERPs to own- and other-race faces.
Show less - Date Issued
- 2022
- PURL
- http://purl.flvc.org/fau/fd/FA00013947
- Subject Headings
- Face perception, Discrimination
- Format
- Document (PDF)
- Title
- Visual Exploratory Behavior in the Squirrel Monkey.
- Creator
- Gammon, William D., Michels, Kenneth M., Florida Atlantic University
- Abstract/Description
-
The viewing behavior of three adult male squirrel monkeys (Saimiri soiureus) to several visual incentives was studied by a paired-comparison testing technique. The total number of times and total duration of time that Ss viewed each incentive, at each window of a two-window cubicle, were recorrlerl automatically. The total duration of time Ss spent in visual exploration was relatively stable over days, averaging 40 per cent of the total testing time. Ss spent more time (p
Show moreThe viewing behavior of three adult male squirrel monkeys (Saimiri soiureus) to several visual incentives was studied by a paired-comparison testing technique. The total number of times and total duration of time that Ss viewed each incentive, at each window of a two-window cubicle, were recorrlerl automatically. The total duration of time Ss spent in visual exploration was relatively stable over days, averaging 40 per cent of the total testing time. Ss spent more time (p< .01) viewing another monkey than a toy snake or an empty plexiglass cage. Differences in time spent viewing the latter two incentives were not significant. Habituation to visual incentives (i.e., decrement in mean drration per response) was demonstrated over successive half-hour intervals within days (p < .01), but not over successive days. Differences in rate of habituation between visual incentives were not significant. Differences in rate of extinction following acquisition on each visual incentive were not significant.
Show less - Date Issued
- 1968
- PURL
- http://purl.flvc.org/fau/fd/FA00000767
- Subject Headings
- Visual discrimination, Monkeys--Behavior
- Format
- Document (PDF)
- Title
- Are There Disparate Outcomes by Race in the Market for Reverse Mortgages?.
- Creator
- Tayar, George, Cole, Rebel, Florida Atlantic University, Department of Finance, College of Business
- Abstract/Description
-
Reverse mortgages are designed to allow house-rich but cash-poor homeowners the ability to tap the equity in their homes. This unique mortgage product has several features that distinguish it from a traditional mortgage, including that no principal or interest payments are made to the lender. Using 2018 - 2020 HMDA data, I test for disparate treatment in outcomes by race, ethnicity and gender. I test for redlining disparate outcomes using the census track minority population percentage as a...
Show moreReverse mortgages are designed to allow house-rich but cash-poor homeowners the ability to tap the equity in their homes. This unique mortgage product has several features that distinguish it from a traditional mortgage, including that no principal or interest payments are made to the lender. Using 2018 - 2020 HMDA data, I test for disparate treatment in outcomes by race, ethnicity and gender. I test for redlining disparate outcomes using the census track minority population percentage as a proxy for neighborhood and test for loan pricing disparate outcomes using the interest rate charged. I test for origination disparate outcomes by comparing approval denial rates. My findings indicate (i) that lenders are more likely to reject applications from borrowers in census tracks with higher percentages of minorities, (ii) that lenders are more likely to reject applications from minority borrowers and (iii) that lenders charge higher interest rates to minority borrowers. I do not find that lenders charge higher interest rates in census tracks with higher percentages of minorities.
Show less - Date Issued
- 2022
- PURL
- http://purl.flvc.org/fau/fd/FA00014038
- Subject Headings
- Mortgage loans, Reverse, Discrimination, Minorities
- Format
- Document (PDF)
- Title
- UNDERSTANDING THE OTHER-RACE EFFECT THROUGH EYE-TRACKING, EXPERIENCE, AND IMPLICIT BIAS.
- Creator
- Soethe, Elizabeth, Anzures, Gizelle, Florida Atlantic University, Department of Psychology, Charles E. Schmidt College of Science
- Abstract/Description
-
Face perception and recognition abilities develop throughout childhood and differences in viewing own-race and other-race faces have been found in both children (Hu et al., 2014) and adults (Blais et al., 2008). In addition, implicit biases have been found in children as young as six (Baron & Banaji, 2006) and have been found to influence face recognition (Bernstein, Young, & Hugenberg, 2007). The current study aimed to understand how gaze behaviors, implicit biases, and other-race experience...
Show moreFace perception and recognition abilities develop throughout childhood and differences in viewing own-race and other-race faces have been found in both children (Hu et al., 2014) and adults (Blais et al., 2008). In addition, implicit biases have been found in children as young as six (Baron & Banaji, 2006) and have been found to influence face recognition (Bernstein, Young, & Hugenberg, 2007). The current study aimed to understand how gaze behaviors, implicit biases, and other-race experience contribute to the other-race effect and their developmental effects. Caucasian children’s (5-10 years of age) and young adults’ scanning behaviors were recorded during an old/new recognition task using Asian and Caucasian faces. Participants also completed an Implicit Association Test (IAT) and a race experience questionnaire. Results found an own-race bias in both children and adults. Only adult’s IAT scores were significantly different from zero, indicating an implicit bias. Participants had a greater number of eye to eye fixations for Caucasian faces, in comparison to Asian faces and eye to eye fixations were greater in adults during encoding phases. Additionally, increased nose looking times were observed with age. Central attention to the nose may be indicative of a more holistic viewing strategy implemented by adults and older children. Participants spent longer looking at the mouth of Asian faces during encoding and test for older children and adults, but younger children spent longer looking at own-race mouths during recognition. Correlations between scanning patterns and implicit biases, and experience difference scores were also observed. Both social and perceptual factors seem to influence looking behaviors for own- and other-race faces and are undergoing changes during childhood.
Show less - Date Issued
- 2020
- PURL
- http://purl.flvc.org/fau/fd/FA00013636
- Subject Headings
- Bias, Discrimination, Eye tracking, Face perception
- Format
- Document (PDF)
- Title
- Effects of Non-reinforced Test Trials on Transposition.
- Creator
- Royal, Jackson W., Adamson, Robert E., Florida Atlantic University, Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
-
Ten male albino rats were trained In a brightness discrimination problem where they were reQuired to choose a sttmulus value of 0.053 ft/cd over one of 0.012 ft/cd. Pairs were matched accordlng to the number of trials requtred to reach a criterion of 18/20 correct responses then randomly assigned to one of two grouos for testing In transposition. Both groups were tested on the orlgtnally positive stimulus and a brighter one: 1.25 ft/cd for Group 8-C and 5.38 ft/cd for Group 8-D. By testing...
Show moreTen male albino rats were trained In a brightness discrimination problem where they were reQuired to choose a sttmulus value of 0.053 ft/cd over one of 0.012 ft/cd. Pairs were matched accordlng to the number of trials requtred to reach a criterion of 18/20 correct responses then randomly assigned to one of two grouos for testing In transposition. Both groups were tested on the orlgtnally positive stimulus and a brighter one: 1.25 ft/cd for Group 8-C and 5.38 ft/cd for Group 8-D. By testing for transposttlon wtth non-reinforced trials, contrary to the usual method, a tendency toward converging measures of transposltton was achteved. Transposition for Group 8-D, In the situation most dissimilar to training, was greater than for 8-C. These results were discussed from relational or Gestalt, Spence model, and Adaptation Level positions and It was shown that the results are contrary to traditional Gestalt predictions. It was oredlcted that, according to underlying assumptions of the Spence model, with continued non-reinforced trials, per cent of transposition for both groups would decrease until a chance level of responding was reached. That this did not occur cannot be explained by the Spence model. Because the variability was too great with such a small N, these results did not reach the .05 level of probability.
Show less - Date Issued
- 1968
- PURL
- http://purl.flvc.org/fau/fd/FA00012596
- Subject Headings
- Transfer of training, Discrimination learning, Extinction (Psychology)
- Format
- Document (PDF)
- Title
- CONTRAST EFFECTS IN THE ACQUISITION OF A BRIGHTNESS DISCRIMINATION.
- Creator
- MOORE, JOHN NICHOLAS, Florida Atlantic University
- Abstract/Description
-
An attempt was made to determine the effects of successive shifts in the quality of a reinforcing agent upon the acquisition of a brightness discrimination. Two levels of sucrose concentration (4 and 32%) were combined factorially during preadaptation and discrimination phases. Dependent measures included response rate and the number of errors made during discrimination acquisition. Results indicated non-significant negative contrast effects in errors and, in addition, negative contrast and...
Show moreAn attempt was made to determine the effects of successive shifts in the quality of a reinforcing agent upon the acquisition of a brightness discrimination. Two levels of sucrose concentration (4 and 32%) were combined factorially during preadaptation and discrimination phases. Dependent measures included response rate and the number of errors made during discrimination acquisition. Results indicated non-significant negative contrast effects in errors and, in addition, negative contrast and amount of reward effects in terms of response rate. It was hypothesized that the absence of amount of reward effects in errors and positive contrast in both dependent measures was a function of a partial between groups design and ceiling effects respectively.
Show less - Date Issued
- 1974
- PURL
- http://purl.flvc.org/fcla/dt/13669
- Subject Headings
- Discrimination learning, Brightness perception, Reward (Psychology)
- Format
- Document (PDF)
- Title
- THE RELATIVE EFFICIENCIES OF TWO PROCEDURES FOR THE EXTINCTION OF DISCRIMINATED AVOIDANCE CONDITIONING.
- Creator
- JACKSON, MASON CALVIN, JR., Florida Atlantic University, Otten, Cynthia S., Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
-
Eighteen rats were used to study two procedures for the extinction of discriminated avoidance. One group (OE) was placed on extinction defined by presenting shocks as programmed but independently of the S's responses, while the other group (CE) was placed on classical extinction defined by the removal of all shocks. The two procedures were compared in terms of rate of decline and terminal level of extinction performance. In addition, the two groups were placed on a discrimination reversal...
Show moreEighteen rats were used to study two procedures for the extinction of discriminated avoidance. One group (OE) was placed on extinction defined by presenting shocks as programmed but independently of the S's responses, while the other group (CE) was placed on classical extinction defined by the removal of all shocks. The two procedures were compared in terms of rate of decline and terminal level of extinction performance. In addition, the two groups were placed on a discrimination reversal task in order to assess each procedure's effects on a new learning problem. The CE group reached a lower level of extinction performance in a fewer number of blocks than the OE Ss. Furthermore, the CE Ss were inferior to the OE Ss in terms of discrimination reversal performance as well. An interpretation of the results in terms of the removal and reinstatement of cues was offered although an alternative explanation relating to a change in the motivational states of the two groups during extinction was also presented. The interpretation in terms of the presence or absence of cues seemed to account for more of the present findings than the traditional one advocating changes in motivational levels resulting from the two divergent extinction operations.
Show less - Date Issued
- 1971
- PURL
- http://purl.flvc.org/fcla/dt/13433
- Subject Headings
- Extinction (Psychology), Discrimination learning, Avoidance (Psychology)
- Format
- Document (PDF)
- Title
- Squirrel Monkeys, Discrimination Learning and Sequential Testing: The Redundancy, Relative Position and Complexity of Random Shapes.
- Creator
- McNab, Levie J., Michels, Kenneth M., Florida Atlantic University, Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
-
This study was a partial replication of one previously reported by Nash and Michels (1966). The purpose was to investigate perceptual form discrimination behavior of young squirrel monkeys as affected by contextual variables of the stimulus. The variables examined were Redundancy, Position and, of the form itself, Complexity. In addition, a sequential method of testing and recording was compared with the conventional 50-trial block procedure. Two 17 month old monkeys were tested on eight...
Show moreThis study was a partial replication of one previously reported by Nash and Michels (1966). The purpose was to investigate perceptual form discrimination behavior of young squirrel monkeys as affected by contextual variables of the stimulus. The variables examined were Redundancy, Position and, of the form itself, Complexity. In addition, a sequential method of testing and recording was compared with the conventional 50-trial block procedure. Two 17 month old monkeys were tested on eight twochoice problems in a Purdue General Test Apparatus. The problems each consisted of two slides on which pairs of random shapes were presented. The shapes within each pair of slides were held constant on the parameters investigated. One slide was designated as the positive stimulus and presented in either the right or left position in random order. The number of correct responses for the 50-trial blocks, as examined by an analysis of variance, failed to reach statistical significance for any of the variables investigated. However, graphic inspection of the data suggests general agreement with the findings of Nash and Michels (1966). In comparing the two methods of testing, the sequential test of performance (STOP) was equally as effective as the conventional method and could have provided a substantial savings in test time. Comparison of scores obtained by the two procedures shows good correlation. Although no strong conclusions can be drawn from the data, they do lead to the speculation that there is a relationship between effect and extent of redundancy, and that failure of S to make a correct response in the test situation may be the result of cue sampling rather than a failure to discriminate.
Show less - Date Issued
- 1968
- PURL
- http://purl.flvc.org/fau/fd/FA00012593
- Subject Headings
- Form perception, Visual discrimination, Monkeys--Behavior
- Format
- Document (PDF)
- Title
- The Effect of the Conditioned Emotional Response (CER) on the Subsequent Acquisition of a Temporal Discrimination.
- Creator
- McNeely, Joseph J., Otten, Cynthia S., Florida Atlantic University
- Abstract/Description
-
Twenty 100 day old male rats were trained to behavioral criterion in a CER paradigm. Two shock levels (.1 and .2 ma) were employed to establish these criteria. Half of the Ss reached medium suppression (suppression ratios between .39 and .11) of a bar pressing response; half achieved high suppression (suppression ratios less than .10). The animals were subsequently exposed to 15 daily sessions of FI training utilizing a head, panel pressing response for food. Five of the medium suppression...
Show moreTwenty 100 day old male rats were trained to behavioral criterion in a CER paradigm. Two shock levels (.1 and .2 ma) were employed to establish these criteria. Half of the Ss reached medium suppression (suppression ratios between .39 and .11) of a bar pressing response; half achieved high suppression (suppression ratios less than .10). The animals were subsequently exposed to 15 daily sessions of FI training utilizing a head, panel pressing response for food. Five of the medium suppression group and five of the high suppression group were exposed to the conditioned suppression CS (a light) during the FI acquisition periods . The remaining rats underwent FI training in the absence of the CS. An Index of Curvature was employed to measure each FI period record and to indicate the degree of acquisition of FI scalloping. Analysis of variance for the four groups revealed only the progression over days to be a significant source of variation. Analysis of linear trend indicated a strong linearity in the variance over 15 days for all groups, but revealed no clear differences between the groups. Some tendencies indicate a slight superiority in acquisition by the medium suppression group which was exposed to the CS during FI training. The high suppression group which was exposed to the light was noticeably inferior in FI discrimination. These results possibly demonstrate an "arousal- interference" mechanism for the CER, but the data do not support the conclusion that the conditioned suppression signal (CS) has a differential effect on subsequent acquisition of an unrelated temporal discrimination. A history of shook treatment, or of CER training, may be responsible, however, for the overall poor acquisition of FI scalloping that was demonstrated by all four groups in this study.
Show less - Date Issued
- 1969
- PURL
- http://purl.flvc.org/fau/fd/FA00000799
- Subject Headings
- Emotional conditioning, Discrimination learning, Learning, Psychology of
- Format
- Document (PDF)
- Title
- THE IMPACT OF RACE ON A DESEGREGATED SCHOOL DISTRICT AS PERCEIVED BY SELECTED SCHOOL ADMINISTRATORS.
- Creator
- MILLER, DORSEY COLUMBUS., Florida Atlantic University
- Abstract/Description
-
The purpose of this study was to determine if black and white secondary school administrative assistants perceived a difference in their job opportunities and responsibilities in the Broward County, Florida, School System, and to determine if this difference was attributable to race. The null hypothesis was that differences in questionnaire results between races were not significantly different from zero was rejected at the conventional .01 level. During the 1978-79 school year, there were...
Show moreThe purpose of this study was to determine if black and white secondary school administrative assistants perceived a difference in their job opportunities and responsibilities in the Broward County, Florida, School System, and to determine if this difference was attributable to race. The null hypothesis was that differences in questionnaire results between races were not significantly different from zero was rejected at the conventional .01 level. During the 1978-79 school year, there were 166 secondary school administrative assistants the Broward County School District. Of this number, 58 (35 percent) were black and 108 (65 percent) were white. A questionnaire was the principal means of collecting data. The random sample included 30 black and 30 white secondary school administrative assistants. Among the major findings were the following: (1) A higher percent of blacks tended to choose responses indicating discrimination than did whites. (2) The general tendency for respondents of both races was toward feeling that their race was not a limiting factor in terms of most of the areas covered by the questionnaire. (3) There was a consistent tendency for whites to feel not discriminated against to a greater relative extent than was the case for blacks on each of the 13 items. The transition from a totally segregated to a totally desegregated school system in Broward County has not been completed. Race is only one variable that has had an impact on this process. This dissertation was but one study toward an accumulation of much needed data. Suggestions were made for future research.
Show less - Date Issued
- 1980
- PURL
- http://purl.flvc.org/fcla/dt/11753
- Subject Headings
- Discrimination in employment--United States, Race discrimination--United States, African Americans--Employment
- Format
- Document (PDF)
- Title
- WOMEN UNIVERSITY PRESIDENTS WHO BREAK THROUGH THE GLASS CEILING: AT WHAT PRICE?.
- Creator
- Volnick, Stacy Ann, Floyd, Deborah, Maslin-Ostrowski, Patricia, Florida Atlantic University, Department of Educational Leadership and Research Methodology, Charles E. Schmidt College of Science
- Abstract/Description
-
On average, the American university president is a white man in his early 60s. Progress has been slow for women in this role. This study examined the university presidency with a focus on the woman president experience. The hypothesis was that based on factors such as the glass ceiling and glass cliff, gender affects the experiences of women university presidents. The purpose of this study was to understand the personal and professional meaning-making of breaking through the glass ceiling for...
Show moreOn average, the American university president is a white man in his early 60s. Progress has been slow for women in this role. This study examined the university presidency with a focus on the woman president experience. The hypothesis was that based on factors such as the glass ceiling and glass cliff, gender affects the experiences of women university presidents. The purpose of this study was to understand the personal and professional meaning-making of breaking through the glass ceiling for women who have held or currently hold the position of president in higher education. The research methodology selected for this study was qualitative with a phenomenological design. There were two guiding research questions, which serve to understand the essence of the experiences of women who serve or have served in the role of president in higher education. The research questions are (a) how do women perceive the impact of the glass ceiling and/or the glass cliff on negotiating the role of university president from ascension to attainment? and (b) how do women university presidents perceive the price they have paid, personally and professionally, for breaking through the glass ceiling? The study sample size consisted of seven current or former women university presidents. The data collection method was semi-structured interviews. This study served to provide insight that may help identify support systems for women in the workplace, changes in perceptions of women in leadership, and how gender roles unfold in both the personal and professional lives of women university presidents
Show less - Date Issued
- 2022
- PURL
- http://purl.flvc.org/fau/fd/FA00014085
- Subject Headings
- University presidents, Women college presidents, Glass ceiling (Employment discrimination), Glass cliff (Employment discrimination), Women, Educational leadership
- Format
- Document (PDF)
- Title
- Visual and electrosensory ecology of batoid elasmobranchs.
- Creator
- Bedore, Christine N., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
The electrosensory and visual adaptations of elasmobranchs to the environment have been more studied than most other senses, however, work on these senses is mostly limited to descriptive analyses of sensitivity, morphology, and behavior. The goal of this work was to explore electrosensory and visual capabilities in a more ecological context. To gain an understanding of the content of bioelectric signals, the magnitude and frequency of these stimuli were recorded from a broad survey of...
Show moreThe electrosensory and visual adaptations of elasmobranchs to the environment have been more studied than most other senses, however, work on these senses is mostly limited to descriptive analyses of sensitivity, morphology, and behavior. The goal of this work was to explore electrosensory and visual capabilities in a more ecological context. To gain an understanding of the content of bioelectric signals, the magnitude and frequency of these stimuli were recorded from a broad survey of elasmobranch prey items... Color vision adaptations also correlated to the photic environment of each species; cownose rays inhabit turbid, green-dominated waters and had two cone visual pigments that maximize contrast of objects against the green background... Yellow stingrays were trichromatic and likely possess the ability to discriminate colors in their clear, reef and seagrass habitats, which are spectrally rich. Both species showed evidence of ultraviolet sensitivity, which may aid in predator and conspecific detection as an enhanced communication channel. Future studies should investigate the integration of sensory input and sensory involvement in intraspecific communication to gain more insight into ecological adaptations.
Show less - Date Issued
- 2013
- PURL
- http://purl.flvc.org/fcla/dt/3362337
- Subject Headings
- Visual discrimination, Adaptation (Biology), Animal ecophysiology, Chondrichthyes, Physiology
- Format
- Document (PDF)
- Title
- THE "OBLIQUE EFFECT" IN THE SPATIAL REPRESENTATION OF CHILDREN FOR THE HORIZONTAL AND VERTICAL PLANE.
- Creator
- HILTON, THOMAS FREDERICK, Florida Atlantic University
- Abstract/Description
-
The effect of stimulus plane orientation (horizontal vs vertical) on mirror-image oblique discrimination was investigated for children 5 to 8 years of age. A significant difference in learning rate favoring the vertical plane presentation was obtained. Tracing the stimuli had no effect on learning rate in either the horizontal or vertical plane. The results were explained in terms of egocentricity in the child's representation of spatial relations.
- Date Issued
- 1976
- PURL
- http://purl.flvc.org/fcla/dt/13827
- Subject Headings
- Orientation (Psychology), Discrimination learning, Mirror images, Space perception in children
- Format
- Document (PDF)
- Title
- Predictive discriminant analysis versus logistic regression for two-group classification problems in educational settings.
- Creator
- Meshbane, Alice., Florida Atlantic University, Morris, John D.
- Abstract/Description
-
The cross-validated classification accuracy of predictive discriminant analysis (PDA) and logistic regression (LR) models was compared for the two-group classification problem. Thirty-four real data sets varying in number of cases, number of predictor variables, degree of group separation, relative group size, and equality of group covariance matrices were employed for the comparison. PDA models were built based on assumptions of multivariate normality and equal covariance matrices, and cases...
Show moreThe cross-validated classification accuracy of predictive discriminant analysis (PDA) and logistic regression (LR) models was compared for the two-group classification problem. Thirty-four real data sets varying in number of cases, number of predictor variables, degree of group separation, relative group size, and equality of group covariance matrices were employed for the comparison. PDA models were built based on assumptions of multivariate normality and equal covariance matrices, and cases were classified using Tatsuoka's (1988, p. 351) minimum chi square rule. LR models were built using the International Mathematical and Statistical Library (IMSL) subroutine Categorical Generalized Linear Model (CTGLM), available with the 32-bit Microsoft Fortran v4.0 Powerstation. CTGLM uses a nonlinear approximation technique (Newton-Raphson) to determine maximum likelihood estimates of model parameters. The group with the higher log-likelihood probability was used as the LR prediction. Cross-validated hit-rate accuracy of PDA and LR models was estimated using the leave-one-out procedure. McNemar's (1947) statistic for correlated proportions was used in the statistical comparisons of PDA and LR hit rate estimates for separate-group and total-sample proportions (z = 2.58, a =.01). Total-sample and separate-group cross-validated classification accuracy obtained by PDA was not significantly different from that obtained by LR in any of the 31 data sets for which maximum likelihood estimates of LR model parameters could be calculated. This was true regardless of assumptions made about population sizes (i.e., equal or unequal). Neither theoretical nor data-based considerations were helpful in predicting these results. Although it does not appear from these data to make a difference which classification model is used, use of the method described in this study for comparing PDA and LR models will enable researchers to select the optimal classification model for a specific data set, regardless of data conditions.
Show less - Date Issued
- 1996
- PURL
- http://purl.flvc.org/fcla/dt/12461
- Subject Headings
- Discriminant analysis, Regression analysis, Logistic distribution, Education, Higher--Research
- Format
- Document (PDF)
- Title
- Gender equity at selected National Collegiate Athletic Association Division III institutions.
- Creator
- Jones, Jerry Keith., Florida Atlantic University, Kerensky, Vasil M.
- Abstract/Description
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The purpose of this study was to compare the perceptions of NCAA Division III male and female athletic administrators regarding gender equity in athletics at their institutions. A further comparison of perceptions was made between the administrators of this study and administrators of similar studies, Finally, a comparison was made between the perceptions of current athletic administrators and data presented by the most recent NCAA gender equity study. Data on individual perceptions of equity...
Show moreThe purpose of this study was to compare the perceptions of NCAA Division III male and female athletic administrators regarding gender equity in athletics at their institutions. A further comparison of perceptions was made between the administrators of this study and administrators of similar studies, Finally, a comparison was made between the perceptions of current athletic administrators and data presented by the most recent NCAA gender equity study. Data on individual perceptions of equity were obtained through a mail-out survey sent to a random sampling of 270 individuals in 135 NCAA Division III schools. Of the four hypotheses tested, two were rejected and two failed to be rejected (Alpha = .05). When a series of T-tests and an analysis of variance were performed, significant differences were found at the .05 level. Results indicated that 71% or more of the respondents perceived equity in 13 of the 14 individual items surveyed. No significant difference was found for age. Females perceived less equity than males in all factors. For changes over the last two or three years, both genders indicated females were favored. For all other tested items, when an advantage was perceived, the advantage favored males. Seventy-eight percent of the athletic administrators in this study indicated that they perceived their programs to have attained overall gender equity. The most recent NCAA gender equity data, while indicating some progress toward equity, does not support the perceptions of the administrators in this study.
Show less - Date Issued
- 1999
- PURL
- http://purl.flvc.org/fcla/dt/12587
- Subject Headings
- Sex discrimination in sports, National Collegiate Athletic Association
- Format
- Document (PDF)
- Title
- Studies on information-theoretics based data-sequence pattern-discriminant algorithms: Applications in bioinformatic data mining.
- Creator
- Arredondo, Tomas Vidal., Florida Atlantic University, Neelakanta, Perambur S., College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
- Abstract/Description
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This research refers to studies on information-theoretic (IT) aspects of data-sequence patterns and developing thereof discriminant algorithms that enable distinguishing the features of underlying sequence patterns having characteristic, inherent stochastical attributes. The application potentials of such algorithms include bioinformatic data mining efforts. Consistent with the scope of the study as above, considered in this research are specific details on information-theoretics and entropy...
Show moreThis research refers to studies on information-theoretic (IT) aspects of data-sequence patterns and developing thereof discriminant algorithms that enable distinguishing the features of underlying sequence patterns having characteristic, inherent stochastical attributes. The application potentials of such algorithms include bioinformatic data mining efforts. Consistent with the scope of the study as above, considered in this research are specific details on information-theoretics and entropy considerations vis-a-vis sequence patterns (having stochastical attributes) such as DNA sequences of molecular biology. Applying information-theoretic concepts (essentially in Shannon's sense), the following distinct sets of metrics are developed and applied in the algorithms developed for data-sequence pattern-discrimination applications: (i) Divergence or cross-entropy algorithms of Kullback-Leibler type and of general Czizar class; (ii) statistical distance measures; (iii) ratio-metrics; (iv) Fisher type linear-discriminant measure and (v) complexity metric based on information redundancy. These measures are judiciously adopted in ascertaining codon-noncodon delineations in DNA sequences that consist of crisp and/or fuzzy nucleotide domains across their chains. The Fisher measure is also used in codon-noncodon delineation and in motif detection. Relevant algorithms are used to test DNA sequences of human and some bacterial organisms. The relative efficacy of the metrics and the algorithms is determined and discussed. The potentials of such algorithms in supplementing the prevailing methods are indicated. Scope for future studies is identified in terms of persisting open questions.
Show less - Date Issued
- 2003
- PURL
- http://purl.flvc.org/fau/fd/FADT12057
- Subject Headings
- Data mining, Bioinformatics, Discriminant analysis, Information theory in biology
- Format
- Document (PDF)