Обновление аффективно окрашенной информации в рабочей памяти: роль эмоционального состояния
The aim of the current study was to provide an empirical evidence of an emotional state’s influence on the updating of affective information in working memory. The emotional congruence effect was expected: participants in a happy emotional state would be more successful in updating positive information compared to negative and neutral information. It was also expected that participants in a negative emotional state would show the opposite pattern of results. The sample included 66 subjects (age: M = 18.56; SD = 1.02). To measure updating, an affective n-back task was applied with positive, negative and neutral words as stimuli. To induce an emotional state, a combination of autobiographical memories and music listening was used. No emotional congruence effect has been obtained. The pattern of results for reaction times and accuracy was similar in both groups; most likely, it was partially caused by the sequence effect. In all types of trials, participants responded faster after emotion induction. The accuracy of responses to negative (M = 0.83; SD = 0.12) was significantly different compared to positive (M = 0.78; SD = 0.16) and neutral trials (M = 0.73; SD = 0.21). The results show that the updating of emotional stimuli is more effective compared to neutral stimuli; among emotional stimuli, updating negative stimuli is more effective compared to positive stimuli.
The degree of mental attention in childhood and adolescence determines in the future the effectiveness of working memory (ability to store and manipulate information). Attention has been previously found to be related to the prefrontal and parietal areas of the human cortex. But the relationship between attention and white matter properties are still largely unknown. The goal of this study was to identify the relationships between attention and fractional anisotropy (FA) of diffusion MRI in bilateral superior longitudinal fasciculus (in three subdivisions SLF 1- 3), arcuate fasciculus (AF), and corpus callosum (CC) in children and adolescents. Subjects: 14 children (9-11 years) and 13 teenagers (12-15 years). During the experiments participants had to establish a match between the colors on the screen and the colors on the previous slide. The task had six difficulty levels and both performance accuracy (m-score) and reaction time (RT) were measured. There was a positive correlation for m-score and a negative correlation for RT with FA in СС (levels 1-3) in the children's group (p<0.05). On the contrary, when FA increases in the right SLF 3 (level 6), there is a decrease in m-score, and when FA increases in the left SLF 3 and AF, there is an increase in RT at 2,3,4 and 6 levels. In contrast, a decrease in RT with an increase FA of bilateral SLF 3 (level 6) and left AF (level 4) was observed for adolescents, which reflects the redistribution of the roles between fiber tracts with age. FA values of the left (level 2) and right (level 1) SLF 2 negatively correlated with mscore (p <0.05) in the same group. For females (n=13) (regardless the age), there was only a negative correlation for m-score (2,3,5 levels) and the only positive correlation for RT (level 2) with FA of the right SLF 1, left and right SLF 2, in the left SLF 3 and СС (p<0.05). For males (n=13), on the contrary, there were positive correlations between m-score and FA of the СС (1,3,4 levels) and the left SLF 1 (5 level), and inverse correlations between RT and FA for the same fibers of the white matter (1 level) (p<0,05). Interestingly, an increase in FA with age was found in males in all the components of the white matter (p<0.01), except for the СС, and in females, on thecontrary – only in the СС. Further research is needed, taking into account gender, to fully understand the influence of white matter on the development of mental attention.
This article analyses the capacity of healthy subjects and patients with local brain damage for decision-making based on the mechanism of emotional learning (Damasio’s somatic marker hypothesis). The connection of the decision-making in uncertainty estimated with the Iowa Gambling Task (IGT), emotional processes and execu- tive functions parameters is demonstrated. The data on differences in the IGT performance depending upon the lateralization of the brain damage are obtained.
The theory of constructive operators was used as a framework to design two versions of a paradigm (color matching task, CMT) in which items are parametrically ordered in difficulty, and differ only contextually. Items in CMT-Balloon are facilitating, whereas items in CMT-Clown contain misleading cues. Participants of ages 7–14 years and adults (N = 149) were studied. We found significant model-predicted graded differences in performance between the facilitating and misleading tasks, across and within age groups, expressing age versus items’ demand interactions. Younger children were differentially affected by contextual cues. Even though both task versions were highly correlated with a well-established developmental measure of attentional capacity, CMT-Clown, which contained misleading cues, was a better measure of working memory capacity. These results show a need to estimate degree of misleadingness whenever performance levels in working memory or mental attention tasks are compared and interpreted. Developmental profiles of both tasks are discussed in terms of contextual differences and neoPiagetian stages of development.
Cognitive control is a set of processes that are responsible for flexible goal-directed behaviour. We did a series of electroencephalographic experiments during the auditory condensation task. The findings obtained allow distinguishing three brain networks that carry out adaptive processes after error commission. We also show that increased response time is associated with lower level of attention and higher level of uncertainty.
Working memory (WM) is essential to auditory comprehension; thus, understanding of the nature of WM is vital to research and clinical practice to support people with aphasia. A key challenge in assessing WM in people with aphasia is related to the myriad deficits prevalent in aphasia, including deficits in attention, hearing, vision, speech, and motor control of the limbs. Eye-tracking methods augur well for developing alternative WM tasks and measures in that they enable researchers to address many of the potential confounds inherent in tasks traditionally used to study WM. Additionally, eye-tracking tasks allow investigation of trade-off patterns between storage and processing in complex span tasks, and provide on-line response measures. The goal of the study was to establish concurrent and discriminative validity of a novel eye movement WM task in individuals with and without aphasia. Additionally, we aimed to explore the relationship between WM and general language measures, and determine whether trade-off between storage and processing is captured via eye-tracking measures. Participants with (n=28) and without (n=32) aphasia completed a novel eye movement WM task. This task, incorporating natural response requirements, was designed to circumvent potential confounds due to concomitant speech, motor, and attention deficits. The task consisted of a verbal processing component intermixed with presentation of colors and symbols for later recall. Performance on this task was indexed solely via eye movements. Additionally, participants completed a modified listening span task that served to establish concurrent validity of the eye-tracking WM task. Performance measures of the novel eye movement WM task demonstrated concurrent validity with another established measure of WM capacity – the modified listening span task. Performance on the eye-tracking task discriminated effectively between participants with and without aphasia. No consistent relationship was observed between WM scores and Western Aphasia Battery aphasia quotient and subtest scores for people with aphasia. Additionally, eye tracking measures yielded no trade-off between processing and storage for either group of participants. Results support the feasibility and validity of employing a novel eye-tracking method to index WM capacity in participants with and without aphasia. Further research is required to determine the nature of the relationship between WM, as indexed through this method, and specific aspects of language impairments in aphasia.