Cognitive psychology

Improving skills in athletic competition often requires structured guidance from coaches, who direct performers’ intentions and attention toward achieving task objectives. Traditionally, coaching follows a linear top-down model, relying on technical demonstrations, extensive verbal instructions, and corrective feedback to promote the execution of "ideal" movement patterns for improved performance. In contrast, non-linear bottom-up coaching approaches, such as differential learning (DL), intentionally introduce unconventional movement variations that may initially appear random or counterproductive. These variations encourage performers to explore the perceptual-motor landscape and disrupt established movement solutions, thereby fostering adaptability and skill development. The current study explored these considerations by investigating an alternative to the traditional action selection model of the basal ganglia (BG). The proposed model suggests that the BG mediates cortical signals from cognitive and perceptual areas to perform analog computations to generate the appropriate velocity, direction, and force output through negative feedback mechanisms. According to this model, D1 and D2receptors within the direct and indirect pathways modulate adaptive gain in velocity control by fine tuning the final motor output.

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 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.

How do neuronal connectivity and the dynamics of distributed brain networks process
information during bimanual coordination? Contemporary brain theories of cognitive
function posit spatial, temporal and spatiotemporal network reorganization as mechanisms
for neural information processing. In this dissertation, rhythmic bimanual coordination is
studied as a window into neural information processing and subsequently an investigation of
underlying network reorganization processes is performed. Spatiotemporal reorganization
between effectors (limbs) is parameterized in a theoretical model via a continuously varying
cross-talk parameter that represents neural connectivity. Thereby, effector dynamics during
coordinated behavior is shown to be influenced by the cross-talk parameter and time delays
involved in signal processing. In particular, stability regimes of coordination patterns
as a function of cross-talk, movement frequency and the time delays are derived. On the
methodological front , spatiotemporal reorganization of neural masses are used to simulate
electroencephalographic data. A suitable choice of experimental control conditions is used
to derive a paradigmatic framework called Mode Level Cognitive Subtraction (MLCS) which
is demonstrated to facilitate the disambiguation between spatial and temporal components
of the reorganization processes to a quantifiable degree of certainty. In the experimental
section, MLCS is applied to electroencephalographic recordings during rhythmic bimanual
task conditions and unimanual control conditions. Finally, a classification of reorganization
processes is achieved for differing stability states of coordination: inphase (mirror) primarily
entails temporal reorganization of sensorimotor networks localized during unimanual
movement whereas spatiotemporal reorganization is involved during antiphase (parallel)
coordination.

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-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.

This qualitative case study investigated the impact of sand tray on individuals
diagnosed with Alzheimer’s and other forms of dementia. Four participants successfully
completed the creation of sand trays while the researcher observed, interviewed, and
documented the individual sand trays. The intervention established that sand tray allows
the dementia patient to kinesthetically connect to their inner cognitions through the
intentional symbolic expression offered by this unique therapeutic medium. Using a
series of eight sand trays of varying thematic concepts, the participants were offered a
modality to facilitate a synthesization of their continued individuation, presenting a
possible neural pathway to connect and express thoughts, feelings, emotions, concerns,
challenges, and fears. The findings of this study include the fact that all trays were
classified as “empty” and that the majority of the participants placed objects almost
exclusively on the right side of the tray, which is commonly associated with the concreteor conscious side. The use of sand tray allowed each individual the opportunity to create autobiographies in the sand and literally navigate through time – past, present, and future, confronting fears, expressing hope and possibilities. The results of the research study offer insight into the psychotherapeutic effects of using sand tray with dementia patients, as well as a better understanding of the cognitive and expressive abilities and limitations of an individual with impaired memory. The results also offer insight into the difficulties with short-term memory in this population and possibly indicate a potential means for monitoring cognitive decline. Keywords: Neurocognitive disorder, Alzheimer’s, dementia, sand tray, play therapy

A total of 96 adults (mean age 23.5 years) solved simple arithmetic problems in digit and verbal format, using Siegler's choice, no-choice method. In the choice condition, they produced the answer and gave a self report of how they solved it. In the no-choice condition, they were asked to use only retrieval. Naming latencies of numerals in both formats were assessed. Verbal problems were solved more slowly than digit problems in all conditions but format did not interact with problem size effect for reaction times. This latter result does not support an effect of presentation format on calculation processes. Participants also named faster digits than verbal numerals. Smaller reaction times and three times as many errors were associated with the no-choice compared to the choice condition. Mathematical aptitude also had an effect. High arithmetic skill was related to smaller reaction times, more retrieval use and fewer errors.

Little is known about how the minds of dead agents are represented. In Study 1, adult participants with different types of explicit afterlife beliefs were asked in an implicit interview task whether various psychological state types (psychobiological, perceptual, emotional, desire, and epistemic states), as well as pure biological imperatives (e.g., need to eat), continue after death. The results suggest that, regardless of one's explicit reports about personal consciousness after death, those who believe in some form of life after death (and, to a certain extent, even those who do not) implicitly represent dead agents' minds in the same way: psychobiological and perceptual states cease while emotional, desire, and epistemic states continue. The findings are interpreted according to simulation constraints---because it is epistemologically impossible to know what it is like to be dead, individuals will be most likely to attribute to dead agents those types of mental states that they cannot imagine being without. In Study 2, the developmental emergence of such reasoning was investigated. In Experiment 1, 4--6-year-olds and 6--8-year-olds were asked a series of biological questions about a dead agent (e.g., "Does his brain still work?"). Even the youngest children were likely to reason that biological processes cease at death. In Experiment 2, different, similarly aged children and also a group of 10--12-year-olds were asked a series of psychological questions about a dead agent (e.g., "Does he know that he's not alive?"). The youngest children were equally likely to reason that both cognitive (e.g., knowing) and psychobiological states (e.g., hunger) continue after death, while the oldest children were more likely to reason that cognitive states continue. Finally, in Experiment 3, both children and adults were asked about a broad array of psychological states (those used in Study 1). With the exception of the youngest children (M = 5 years), who did not distinguish between any of the psychological state types, older children (M = 11-years) and adults were most likely to attribute to dead agents epistemic, emotional, and desire states, suggesting that developmentally based mechanisms underlie implicit accounts of deceased agents' minds.

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 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.

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 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.

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 (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.