Effects of working memory capacity on mental set due to domain knowledge

The present set of studies examines how working memory capacity (WMC) relates to performance on a Remote Associates Task (RAT), originally designed by Mednick as a quantifiable creative problem solving assessment. The source of fixation was manipulated across two sets of RAT items. One set was neutral with no specific fixation embedded in them, while the second set was baseball-misleading, designed so that prior knowledge of baseball would lead to an incorrect solution attempt. WMC scores were positively related to performance on RAT items in all conditions, except one. High baseball knowledge participants' WMC scores did not relate to performance on the baseball-misleading RAT. While in general WMC may lead to better RAT performance, these results suggest that when there is a candidate solution strongly activated by prior knowledge, WMC may actually lead to too much focus on the incorrect solution and exacerbate mental sets.     

Emotional competence and willingness to seek help from professional and nonprofessional sources

We sought to determine the relationship between emotional competence and willingness to seek help for emotional problems and suicidal ideation. A survey of 300 university undergraduates assessed emotional competence (skill at emotion perception, managing self-relevant emotions, and managing others' emotions), hopelessness, willingness to seek help from health professionals (e.g. counsellor) and nonprofessionals (friends, family), and perceived usefulness of past help-seeking experience. Those who reported feeling less skilled at managing emotions were less willing to seek help from family and friends for both emotional problems and suicidal ideation and less willing to seek help from health professionals for suicidal ideation. These relationships held even after controlling for hopelessness, sex, and past help-seeking experience. Mediational analysis suggested that people low in managing others' emotions were less willing to seek help from professionals because they had had poorer experiences with mental health professionals in the past. There was no significant relationship between emotion perception skill and willingness to seek help. People most likely to be in need of help (those poor at managing emotions) were the least willing to seek it, and if they did seek it, were the least likely to benefit from it.     

The effects of three different television programs on young children's peer interactions and toy play

The current study investigated the impact of different television programming on the social interactions and toy play of preschool children. Same-sex pairs of young children were observed during three types of television programs: cartoons, Sesame Street, and situation comedies. Children were also observed when the television screen was black. Children visually attended to the cartoons the most, Sesame Street less often, and the situation comedy the least. Cartoons dramatically depressed social interaction. Sesame Street elicited the most verbal imitation. Both Sesame Street and the situation comedy allowed the children to divide activity among their peers, the toys, and the television program. Girls verbally imitated program content more than boys. This pattern of findings remained after the children's visual attention to the television was statistically controlled. Several developmental trends were detected. The image of children “mesmerized” in front of the television set, foresaking social interactions and active involvement with their object environment, held true for only one type of programming, namely, cartoons. During the other programs, the children remained active and socially involved.     

The Effects of Selective Cholinergic Basal Forebrain Lesions and Aging upon Expectancy in the Rat

The effects of selective cholinergic cell loss within the basal forebrain (BF) were determined using a task that requires shifting of attention between two visual stimuli. Discriminability between two stimuli and response bias were determined in young and old F-344 rats given BF injections of IgG-192 saporin (100 ng). The lesion reduced ChAT activity in the frontal and parietal cortices, hippocampus, and olfactory bulbs. The lesion did not significantly alter Na⁺/K⁺-ATPase activity in cortex, hippocampus, or olfactory bulbs, or endogenous levels of neuropeptide Y and neurokinin B within the BF. The BF lesions impaired both stimulus discriminability and response bias in young and old rats. The BF lesions had a significantly greater effect upon stimulus discriminability and response bias in aged rats, compared to young rats, only when the stimulus duration was very brief, i.e., when the task was most difficult to solve. At longer stimulus durations, aging and lesions showed no interaction. The results suggest that the selective loss of cholinergic cells in the BF, but not normal aging, impairs the ability to discriminate between independent sensory stimuli. The loss of these cells confers a response bias in simple operant tasks involving motor responses to reward-related visual stimuli.     

Effective Approaches to New Faculty Development

The author provides research-based and practical advice on how to foster the career development of new and junior faculty. She first reviews who the new and junior faculty are and highlights research findings on the work and career experiences of these faculty members. She then describes model programs and successful strategies to support the newest members of the professoriat, including exemplary programs for orientation, mentoring, research, and teaching development.     

Ear asymmetries on a selective attentional task

To ascertain whether there are ear-hemisphere asymmetries of selective attention, signal stimuli (tonal sequences) were presented monaurally with and without complex maskers (music and speech). The right ear-left hemisphere was more disrupted by language maskers; the left ear-right hemisphere was more disrupted by music maskers. These results suggest that there are hemispheric asymmetries of selective attention and that the ear hemisphere that usually processes a class of stimuli has greater difficulty filtering out those stimuli than does the nonspecialized hemisphere.