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- Title
- Age-related changes in executive function and the influence of processing speed.
- Creator
- Jurado Noboa, Maria Beatriz., Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
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Healthy aging has been associated with declines in executive functioning (EF) but it remains unclear how different subprocesses of EF are affected by age and by other possibly mediating variables. The principal aim of the present study was to investigate the effects of age and processing speed on three executive functions: set-shifting, planning, and attentional control. Four age groups (20-29 years, 60-69 years, 70-79 years, and 80-89 years) were compared on the Wisconsin Card Sorting Test ...
Show moreHealthy aging has been associated with declines in executive functioning (EF) but it remains unclear how different subprocesses of EF are affected by age and by other possibly mediating variables. The principal aim of the present study was to investigate the effects of age and processing speed on three executive functions: set-shifting, planning, and attentional control. Four age groups (20-29 years, 60-69 years, 70-79 years, and 80-89 years) were compared on the Wisconsin Card Sorting Test (WCST), the DKEFS Tower Test, the Conner's Continuous Performance Test, and a Letter comparison test of processing speed. Results suggested that increased age was associated with decreased performance on most of the studied executive measures, but not all EF are equally affected by age. A slowdown in processing speed mediates some, but not all, decrements in executive performance. The results are interpreted in light of recent neuroimaging data on age-related changes in brain functioning.
Show less - Date Issued
- 2009
- PURL
- http://purl.flvc.org/FAU/187213
- Subject Headings
- Aging, Psychological aspects, Cognitive psychology, Memory disorders in old age, Ability, Influence of age on, Context effects (Psychology), Cognition, Age factors
- Format
- Document (PDF)
- Title
- Preserved and deficient calculation processes in Alzheimer's disease and mild cognitive impairment.
- Creator
- Jurado Noboa, Maria Beatriz., Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
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Two skills necessary for the execution of proficient calculation, retrieving arithmetic facts from memory and accessing number magnitude information, were studied in a group of patients diagnosed with Alzheimer's disease (AD), mild cognitive impairment (MCI), and healthy controls to try to elucidate the locus of impairment in AD-related calculation deficits. This was achieved through the use of an arithmetic production task and a number-matching task as measures of explicit and implicit...
Show moreTwo skills necessary for the execution of proficient calculation, retrieving arithmetic facts from memory and accessing number magnitude information, were studied in a group of patients diagnosed with Alzheimer's disease (AD), mild cognitive impairment (MCI), and healthy controls to try to elucidate the locus of impairment in AD-related calculation deficits. This was achieved through the use of an arithmetic production task and a number-matching task as measures of explicit and implicit retrieval of arithmetic facts, and a numerical Stroop task that assesses automatic access to number magnitude representation. AD patients, but not MCI patients, showed high response latencies and a high number of errors when performing multiplications in the production task, and reduced automatic retrieval of arithmetic task in the number-matching task. All participants showed the classic problem-size effect often reported in the mathematical cognition literature. Performance on the numerical Stroop task suggests that access to number magnitude information is relatively resistant to cognitive impairment. ... Results for the AD group are consistent with a pattern of preserved and impaired cognitive processes that might mediate the reported calculation deficits in AD.
Show less - Date Issued
- 2013
- PURL
- http://purl.flvc.org/fcla/dt/3362384
- Subject Headings
- Aging, Psychological aspects, Cognitive psychology, Memory disorders in old age, Alzheimer's disease, Diagnosis, Context effects (Psychology)
- Format
- Document (PDF)
- Title
- The influrence of language on recognition memory for motion.
- Creator
- Karaman, Ferhat., Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
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Satellite-framed languages and verb-framed languages differ in how they encode motion events. English encodes or lexicalizes Path in verb particles, prepositional phrases, or satellites associated with the main verb. In contrast, Turkish tends to encode Path in the main verb of a clause. When describing motion events, English speakers typically use verbs that convey information about manner rather than path, whereas Turkish speakers do the opposite. In this study, we investigated whether this...
Show moreSatellite-framed languages and verb-framed languages differ in how they encode motion events. English encodes or lexicalizes Path in verb particles, prepositional phrases, or satellites associated with the main verb. In contrast, Turkish tends to encode Path in the main verb of a clause. When describing motion events, English speakers typically use verbs that convey information about manner rather than path, whereas Turkish speakers do the opposite. In this study, we investigated whether this crosslinguistic difference between English and Turkish influences how the speakers of these languages perform in a non-linguistic recognition memory task. In a video description task, English speakers used more manner verbs in the main verb of sentences than Turkish speakers did. In the recognition memory task, English speakers attended more strongly than Turkish speakers did to path of motion. English and Turkish speakers attended equally to manner of motion, however, providing no support for the linguistic relativity hypothesis.
Show less - Date Issued
- 2013
- PURL
- http://purl.flvc.org/fcla/dt/3362478
- Subject Headings
- Psycholinguistics, Computational neuroscience, Cognitive psychology, Context effects (Psychology), Transference (Psychology), Motion segmentation
- Format
- Document (PDF)
- Title
- The effects of language proficiency and task type on executive function and working memory performance in bilingual adults.
- Creator
- Lalwani, Laxmi N., Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
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Research shows that bilingualism confers substantial cognitive benefits in children and the elderly. Bilingual advantages on nonverbal working memory, updating, shifting and inhibition tasks are widely reported. However, advantages are not always observed in young adults. These disparities may be due to varied proficiency levels and task types (verbal versus nonverbal) administered. This study sought to detect bilingual performance advantages on executive function and working memory tasks ...
Show moreResearch shows that bilingualism confers substantial cognitive benefits in children and the elderly. Bilingual advantages on nonverbal working memory, updating, shifting and inhibition tasks are widely reported. However, advantages are not always observed in young adults. These disparities may be due to varied proficiency levels and task types (verbal versus nonverbal) administered. This study sought to detect bilingual performance advantages on executive function and working memory tasks (verbal and nonverbal working memory, updating, shifting and inhibition tasks) between groups of 37 high and 37 low proficiency Spanish-English bilingual and 40 English monolingual young adults. ... Young adulthood may represent a lull during which bilingualism does not confer cognitive advantages for functions examined.
Show less - Date Issued
- 2012
- PURL
- http://purl.flvc.org/FAU/3358602
- Subject Headings
- Bilingualism, Psychological aspects, Psycholinguistics, Cognition, Memory, Cognitive psychology
- Format
- Document (PDF)
- Title
- Selective Activation of the SK1 Subtype of Small Conductance Ca2+ Activated K+ Channels by GW542573X in C57BL6J Mice Impairs Hippocampal-dependent Memory.
- Creator
- Rice Kuchera, Claire A., Stackman, Robert W., Florida Atlantic University, Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
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SK channels are small conductance Ca2+-activated K+ channels expressed throughout the CNS. SK channels modulate the excitability of hippocampal CA1 neurons by affecting afterhyperpolarization and shaping excitatory postsynaptic responses. Such SK-mediated effects on activity-dependent neuronal excitability and synaptic strength are thought to underlie the modulatory influence of SK channels on memory encoding. Here,the effect of a new SK1 selective activator, GW542573X, on hippocampal...
Show moreSK channels are small conductance Ca2+-activated K+ channels expressed throughout the CNS. SK channels modulate the excitability of hippocampal CA1 neurons by affecting afterhyperpolarization and shaping excitatory postsynaptic responses. Such SK-mediated effects on activity-dependent neuronal excitability and synaptic strength are thought to underlie the modulatory influence of SK channels on memory encoding. Here,the effect of a new SK1 selective activator, GW542573X, on hippocampal-dependent object memory, contextual and cued conditioning, and trace fear conditioning was examined. The results demonstrated that pre- but not post-training systemic administration of GW542573X impaired object memory and trace fear memory in mice 24 h after training. Contextual and cued fear memory were not disrupted. These current data suggest that activation of SK1 subtype-containing SK channels impairs long-term memory. These results are consistent with converging evidence that SK channel activation suppressed behaviorally triggered synaptic plasticity necessary for encoding hippocampal-dependent memory.
Show less - Date Issued
- 2015
- PURL
- http://purl.flvc.org/fau/fd/FA00004541, http://purl.flvc.org/fau/fd/FA00004541
- Subject Headings
- Cellular control mechanisms, Cognitive neuroscience, Cognitive psychology, Hippocampus (Brain), Mice as laboratory animals, Neurotransmitter receptors
- Format
- Document (PDF)
- Title
- Not what you think: judgement transformation through nonconscious thought.
- Creator
- Parkin, Steven S., Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
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Perceiver's use of thought suppression to maintain a consistent attitude toward another person ironically leads to nonlinear changes in their evaluations over time. In this study of interpersonal evaluation, 157 participants across three conditions (high-level mindset, low-level mindset, and control) observe the same person in seven counter-balanced videotaped social interactions depicting helpful, rude, and ambiguous behaviors. The high-level prime instructed participants to focus on the...
Show morePerceiver's use of thought suppression to maintain a consistent attitude toward another person ironically leads to nonlinear changes in their evaluations over time. In this study of interpersonal evaluation, 157 participants across three conditions (high-level mindset, low-level mindset, and control) observe the same person in seven counter-balanced videotaped social interactions depicting helpful, rude, and ambiguous behaviors. The high-level prime instructed participants to focus on the target's goals and intentions ; low-level participants focused on the target's specific concrete behaviors. High-level participants better resisted the influence of conflicting information by surpressing thoughts inconsistent with their initial evaluation of the target. From the dynamical systems perspective, such suppressed information over time becomes organized as an alternative attractor, nonconsciously influencing the perceiver's cognitive system, leading to change away from an initial attitude, as measured by the Mouse Paradigm procedure.
Show less - Date Issued
- 2012
- PURL
- http://purl.flvc.org/FAU/3355871
- Subject Headings
- Emotions and cognition, Subconsciousness, Unconscious (Psychology), Cognitive psychology
- Format
- Document (PDF)
- Title
- THE CAUSAL ROLE OF THETA OSCILLATIONS IN THE FRONTOPARIETAL NETWORK ON COGNITIVE FLEXIBILITY.
- Creator
- Yoon, Yosun, Hong, Sang Wook, Florida Atlantic University, Department of Psychology, Charles E. Schmidt College of Science
- Abstract/Description
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Cognitive flexibility is crucial for efficient goal-directed behavior, especially in rapidly changing environments. While recent studies have consistently shown enhanced theta power and synchronization in the frontoparietal network during flexible task-switching, direct evidence establishing a causal link between theta-rhythm brain oscillation and cognitive flexibility remains limited. In this study, we applied transcranial alternating current stimulation (tACS) to the frontoparietal network...
Show moreCognitive flexibility is crucial for efficient goal-directed behavior, especially in rapidly changing environments. While recent studies have consistently shown enhanced theta power and synchronization in the frontoparietal network during flexible task-switching, direct evidence establishing a causal link between theta-rhythm brain oscillation and cognitive flexibility remains limited. In this study, we applied transcranial alternating current stimulation (tACS) to the frontoparietal network at a theta frequency (6 Hz) with a phase difference of either 0° (inphase) or 180° (antiphase) to explore its impact on task-switching performance. The results showed no significant tACS modulation effects on switch costs or neural oscillatory synchronization in the frontoparietal network. However, a consistent negative correlation was observed between frontoparietal theta power in the early time window of cue-target interval and task switching performance, implying the close relationship between proactive control in task switching and frontoparietal theta activities.
Show less - Date Issued
- 2023
- PURL
- http://purl.flvc.org/fau/fd/FA00014340
- Subject Headings
- Theta Rhythm, Cognition, Cognitive psychology
- Format
- Document (PDF)