Irrelevant sensory stimuli interfere with working memory storage: Evidence from a computational model of prefrontal neurons

The encoding of irrelevant stimuli into the memory store has previously been suggested as a mechanism of interference in working memory (e.g., Lange & Oberauer, Memory, 13, 333–339, 2005; Nairne, Memory & Cognition, 18, 251–269, 1990). Recently, Bancroft and Servos (Experimental Brain Research, 208, 529–532, 2011) used a tactile working memory task to provide experimental evidence that irrelevant stimuli were, in fact, encoded into working memory. In the present study, we replicated Bancroft and Servos’s experimental findings using a biologically based computational model of prefrontal neurons, providing a neurocomputational model of overwriting in working memory. Furthermore, our modeling results show that inhibition acts to protect the contents of working memory, and they suggest a need for further experimental research into the capacity of vibrotactile working memory.     

Effects of emotion regulation on concurrent attentional performance

We explored the attentional demands of unpleasant picture viewing and emotion regulation strategies. Participants received instructions to view, reappraise, or suppress their emotional experience to unpleasant and neutral pictures, while performing a concurrent auditory discrimination task, both during and after the picture presentation period. Reaction times (RTs) were slower during unpleasant than neutral pictures, which persisted into the post-picture period. RTs were also slower during reappraisal and suppression than viewing and for earlier than later tones following picture onset. An enduring effect of negative emotion was found in the picture and post picture period for suppression but not reappraisal. Findings suggest that both viewing emotional stimuli and regulating one’s emotions using either reappraisal or suppression draw upon common attentional resources, but with suppression resulting in the distinct cost of maintaining the effects of negative emotion.     

The stress of food allergy issues in daily life

Objective: Food allergies are a growing health concern, but their implications for daily psychological functioning are unknown. This micro-longitudinal study investigated the daily frequency of food allergy issues and how this related to experiences of stress, mood and physical energy.

Design: One hundred and eight adults with physician-diagnosed food allergies completed an initial Internet survey followed by a 2-week Internet daily diary survey.

Main outcome measures: The initial survey collected socio-demographic and food allergy information. The daily survey collected information about the participants’ experiences of stress, mood, physical energy and food allergy issues during that day.

Results: Commonly experienced allergy issues included negative physical symptoms, higher food prices, anxiety about safety of food, trouble maintaining a healthy diet and anxiety/stress at social occasions. Furthermore, multilevel modelling analyses showed that stress and negative mood were significantly higher on days with more allergy issues. Older adults experienced lower positive mood and physical energy on days with more issues.

Conclusion: This is the first study to incorporate near to real-time tracking to examine the frequency of food allergy issues and the implications for daily psychological functioning. Targeting the issues we identified could reduce stress in patients with food allergies and improve their overall quality of life.     

Counting your blessings: Positive memories among grateful persons

We conducted two studies investigating the relationship of gratitude to autobiographical memory of positive and negative life events. Gratitude was assessed with an attitudinal measure and college students were asked to recall both positive and negative events from their past. In both studies, a significant positive relationship was found between trait gratitude and a positive memory bias. In Study 2 it was found that gratitude still reliably predicted positive memory bias after controlling for depression. Further, it was found that a positive intrusive memory bias was associated with gratitude in both studies. Thus, an important component of gratitude may be an enhanced tendency to recall positive events from one's life.     

Who do students with mild disabilities nominate as cool in inclusive general education classrooms?

Examined the nominations that elementary students with mild disabilities made for peers they perceived as cool. The total sample was comprised of 948 students (496 girls, 452 boys) from the metropolitan Chicago area and North Carolina and included 107 (11.3%) students with mild disabilities. Overall, students with mild disabilities nominated prosocial and athletic peers who affiliate with students with mild disabilities. However, aggressive boys who are central in the social network were highly likely to view aggressive peers as cool. Results are discussed in relation to implications for social interventions for students with mild disabilities.     

An Exploration of the Relationship Between Spirituality and State and Trait Anger Among Medical Students

There is a dearth of studies exploring spiritual attitudes of medical students from developing countries and its relationship to anger. This study was conducted to assess spiritual attitudes and their relationship with anger in a set of medical students in southern India. In this cross-sectional observational study, medical students who were undergoing clinical rotations were offered participation. Selected demographic data were obtained. The participants were rated using the Spiritual Attitudes Inventory [SAI, which comprises of Duke Religiosity Index, Existential Well-Being Scale (EWBS), Negative Religious Coping and Multidimensional Health Locus of Control scale] and State and Trait Anger Expression Inventory 2. Out of 98 students approached, 82 participated (response rate 83.6 %). The mean age of sample was 20.7 years (±0.9 years) with a slight preponderance of females (54.9 %). SAI scores correlated well significantly with subscale scores. Gender had no difference on the SAI or subscale score. Differences were found between self-reported religion and EWBS scores (Kruskal–Wallis χ ² = 8.891, p = 0.012). Total SAI score had a significant negative correlation with state anger, trait anger and anger expression. High levels of spirituality may be correlated with lower levels of state anger, trait anger and anger expression in medical students.     

Depression in children: Parent,teacher, and child perspectives

Depressed and nondepressed children were found to differ in the types of behavior problems manifested at home and at school. Children rated as depressed by their parents on the Personality Inventory for Children evidenced significantly more conduct problems, anxiety, impulsive hyperactivity, learning problems, psychosomatic problems, perfectionism, and muscular tension at home than children rated as nondepressed. Depressed children were rated by their teachers as displaying more inattentionpassivity than nondepressed children. A significant but modest relationship was found between parent report and child selfreport of the child's depression. Depressed children attributed positive events to external causes and negative events to internal causes significantly more than did nondepressed children. The specificity of these results to depression was also examined;the particular features of childhood depression are compared to the features of adult depression. The investigators would like to thank Jim McFerren and Ralph Zalazar for their work as research assistants and David Watson for his help with the statistical analyses. The helpful comments of Eric Klinger and Auke Tellegen are gratefully acknowledged. The cooperation of Dr. Loren Benson, director of personnel services of the Hopkins School District #274; Mr. Edward Ryshavy, principal of Glen Lake Elementary School; and the teachers of that school is greatly appreciated.     

Stroop interference with response,comparison, and encoding stages in a sentence-picture comparison task

The paper discusses a Stroop variant of the word-picture comparison task analyzed by Chase and Clark (1971). The locatives above or below were printed at the center of a reference square, and Ss reported “Yes” if there was a word or an array of Xs in the location specified and “No” if there was not. Under the control (Xs) conditions, above displays were classified faster than below displays and true displays faster than false displays. These effects were unaltered when the words “yes” or “no” or “right” or “wrong” were printed in place of the Xs, although there was a small overall increase in response latency under these Stroop conditions that was independent of agreement or disagreement between the distractor and the response to be made. When the locatives up and down were printed on the display, a substantial Stroop effect was observed, and the above-below and true-false effects were eliminated. These results are discussed in relation to theories about the nature of Stroop interference and processes involved in sentence-picture comparisons.