Clark's nutcrackers (Nucifraga columbiana) and the effects of goal--landmark distance on overshadowing

Three groups of Clark's nutcrackers (Nucifraga columbiana) were trained to find a goal location defined by an array of 4 landmarks that varied in goal--landmark distance. The arrays for each group differed in the distance of the closest landmark and contained goal--landmark distances that were common across groups, allowing for the examination of the effects of both relative and absolute goal--landmark distance on encoding of a landmark array. All 3 groups readily learned the task and were subsequently tested in probe tests with only single landmarks from the array available. Search error in tests with single landmarks was compared both within and across groups. Results demonstrated that both relative and absolute goal-landmark distances are important in spatial search.     

Grammatical language impairment and the specificity of cognitive domains: relations between auditory and language abilities

Grammatical-specific language impairment (G-SLI) in children, arguably, provides evidence for the existence of a specialised grammatical sub-system in the brain, necessary for normal language development. Some researchers challenge this, claiming that domain-general, low-level auditory deficits, particular to rapid processing, cause phonological deficits and thereby SLI. We investigate this possibility by testing the auditory discrimination abilities of G-SLI children for speech and non-speech sounds, at varying presentation rates, and controlling for the effects of age and language on performance. For non-speech formant transitions, 69% of the G-SLI children showed normal auditory processing, whereas for the same acoustic information in speech, only 31% did so. For rapidly presented tones, 46% of the G-SLI children performed normally. Auditory performance with speech and non-speech sounds differentiated the G-SLI children from their age-matched controls, whereas speed of processing did not. The G-SLI children evinced no relationship between their auditory and phonological/grammatical abilities. We found no consistent evidence that a deficit in processing rapid acoustic information causes or maintains G-SLI. The findings, from at least those G-SLI children who do not exhibit any auditory deficits, provide further evidence supporting the existence of a primary domain-specific deficit underlying G-SLI.     

Healthy and unhealthy emotion regulation: personality processes, individual differences, and life span development

Abstract Individuals regulate their emotions in a wide variety of ways. Are some forms of emotion regulation healthier than others? We focus on two commonly used emotion regulation strategies: reappraisal (changing the way one thinks about a potentially emotion‐eliciting event) and suppression (changing the way one responds behaviorally to an emotion‐eliciting event). In the first section, we review experimental findings showing that reappraisal has a healthier profile of short‐term affective, cognitive, and social consequences than suppression. In the second section, we review individual‐difference findings, which show that using reappraisal to regulate emotions is associated with healthier patterns of affect, social functioning, and well‐being than is using suppression. In the third section, we consider issues in the development of reappraisal and suppression and provide new evidence for a normative shift toward an increasingly healthy emotion regulation profile during adulthood (i.e., increases in the use of reappraisal and decreases in the use of suppression).     

Can semantic information be transferred between hemispheres in the split-brain?

Data from experiments with split-brain patients, who have had their left and right hemispheres disconnected, suggests a remarkable specialization of function within each hemisphere. At the same time, these patients conduct their daily lives with great proficiency. This ability suggests that some information integral to coordinated function between the hemispheres is available in the absence of the corpus callosum. Is information about the semantics of words one type of information that is shared? An experiment by suggests that it may be. Lambert reported that living/nonliving word categorization was delayed when disconnected hemispheres processed words belonging to the same category. Although other interpretations are plausible, Lambert described this effect as having a semantic source. We attempted to replicate the original effect with two additional split-brain patients, J.W. and V.P., and to extend the original design to clarify the source of the putative semantic effect. Our results indicate that any semantic interaction between the split hemispheres is not reliable. As such our study adds to the growing literature indicating that subcortical transfer of semantic information is more illusory than real.     

Body esteem and body fat in British school children from different ethnic groups

The aim of the study was to examine the relationship between body esteem and body fat in British school children. Two hundred and seventy seven, 11–14-year-old children from central England took part in the study. Body esteem was measured using the Body Esteem Scale for children and percent body fat was determined by skin-fold measures. Results indicate that body esteem and adiposity were negatively related for the whole sample, for boys and girls and for White children, Black children and Asian children. Factorial ANOVA also indicated differences in body esteem according to gender and ethnicity. Boys and Black children had significantly higher body esteem than girls and Asian children respectively. Differences in body fat were also evident according to gender with boys being leaner than girls. No differences in body esteem or body fat were evident across school years.     

Attachment categories as reflections of multiple dimensions: comment on Fraley and Spieker (2003)

Ainsworth's system of classifying patterns of attachment behavior has served the field well and will not be easily displaced--not because of a commitment by attachment researchers to the taxonomic status of these categories but rather because of difficulties lying in the way of a dimensional approach. Foremost among these is the large number of dimensions used in making classifications and the need to develop reliable scales to tap them. Other problems include the need to capture how behavior changes across age and across the episodes of the Strange Situation. Others will debate R.C. Fraley and S.J. Spieker's (2003) arguments concerning taxonomic status. However, whether taxa or not, Ainsworth's categories at the least have represented well the multidimensional space underlying attachment behavior in conditions of mild stress. Only when an alternative approach is demonstrated to predict (with equal power, in practice) the vast range of outcomes associated with Ainsworth's categories will it be a candidate for substitution.