Changes in Behaviour and Body Weight Following a Single or Double Social Defeat in Rats

In a series of experiments, the consequences of a single and double social conflict on various behaviours and body weight in rats were studied. Animals were subjected to social defeat by placing them into the territory of an aggressive male conspecific for one hour, either once, or twice at the same time on two consecutive days. To assess the consequences of social defeat, three experiments were performed with independent groups of rats. In the first experiment, an open field test was performed two days after the last conflict. Locomotor activity was strongly reduced after social defeat. There were no differences between the single and double defeat group. To assess the effects of social defeat on subsequent social behaviour, a second experiment was performed in which experimental animals were confronted with an unfamiliar non-aggressive rat two days after a single or double conflict. Social defeat resulted in a reduction of social contact with the unfamiliar conspecific. There was no difference between the single and double conflict group. In the third experiment, the effects of social conflict on food intake, body weight and saccharine preference were measured. Food intake was not affected after a single conflict, but in the double conflict group food intake was decreased for several days. Body weight gain was decreased after both single and double social defeat. The decrease was stronger in the double conflict group. Water intake and saccharine preference were not significantly affected. This study revealed that social defeat in rats causes pronounced changes in various behaviours and body weight. Different aspects of behaviour are differentially affected by defeat with respect to the magnitude and time course of the changes induced. Moreover, different behavioural parameters are differentially sensitive to repetition of the stressor.     

Temporal and interactional effects in short-term storage

The operation of temporal and interactional processes in short-term storage was studied under conditions which require that information about all items presented be stored and the relative retention of all be evaluated concurrently, but preclude further interference after presentation by testing or retrieval effects. Random sequences of twelve two digit numbers from a known set of thirteen were presented visually at 1, 2, or 4 per sec. for full interval and .25 sec. presentation durations to 15 Ss who reported the missing number that was not presented from the set. For 1/sec. full duration presentations the missing scan serial position error distribution shows a linear decrease in errors from first through last presented items. As rate of presentation increases there is a linear increase in total errors, a linearly increasing primacy effect, and an increase of errors over at least the last half of the sequence such that the error distribution remains linear with the same slope. These findings are compatible with the operation of time dependent interactional and perceptual processes in short-term storage but not with autonomous decay.     

Mentoring,job satisfaction,gender, and the legal profession

We examine the prevalence of mentoring among lawyers and the effect mentoring has on their employment situations, with special attention to gender differences. The data come from a 1989 cross-sectional survey of 1132 Georgia lawyers (80% white and 18% black). No significant difference in having mentors was found across racial categories. Results initially show female lawyers are more likely than males to have mentors, but this is due to gender differences in type of law practice and position in them; among associate-level lawyers in law firms there is no gender difference in having a mentor. Having a mentor improves lawyers' job satisfaction; and the size of this benefit is the same for both sexes.A revision of a paper presented at the 1992 annual meeting of the Southern Sociological Society, New Orleans, Louisiana, April 12.     

Relationships between Parental Maltreatment and Adolescents’ School Adjustment: Mediating Roles of Self-Esteem and Peer Attachment

Parental maltreatment of children has been steadily increasing in Korea despite national efforts to curb it. Children and adolescents who experience maltreatment develop psychological and social maladjustment. Therefore, mediating variables alleviating the negative effects of parental maltreatment on child development should be investigated to develop effective intervention programs. We identified the direct effects of parental abuse and neglect on adolescents’ school adjustment and the mediating effects of adolescents’ self-esteem and peer attachment on the relationships between parental abuse and neglect and their school adjustment. We used data from 2351 middle school students who participated in the Korean Children and Youth Panel Survey. Structural equation modeling revealed the following: child neglect directly and negatively related with adolescents’ school adjustment, whereas child abuse did not. Further, while adolescents’ self-esteem and peer attachment mediated the relationship between child neglect and school adjustment, adolescents’ self-esteem alone mediated the relationship between child abuse and school adjustment. These findings imply that there is a need to develop different intervention programs based on child maltreatment types. Finally, we suggested that the negative effects of parental neglect on adolescents’ school adjustment could be alleviated by adolescents’ self-esteem recovery resulting from peer support. On the other hand, in the case of adolescents experiencing parental abuse, self-esteem recovery through education and counseling provided by teachers or respected adults could be prioritized.     

Stimulus-response incompatibility eliminates inhibitory cueing effects with saccadic but not manual responses

There are thought to be two forms of inhibition of return (IOR) depending on whether the oculomotor system is activated or suppressed. When saccades are allowed, output-based IOR is generated, whereas input-based IOR arises when saccades are prohibited. In a series of 4 experiments, we mixed or blocked compatible and incompatible trials with saccadic or manual responses to investigate whether cueing effects would follow the same pattern as those observed with more traditional peripheral onsets and central arrows. In all experiments, an uninformative cue was displayed, followed by a cue-back stimulus that was either red or green, indicating whether a compatible or incompatible response was required. The results showed that IOR was indeed observed for compatible responses in all tasks, whereas IOR was eliminated for incompatible trials—but only with saccadic responses. These findings indicate that the dissociation between input- and output-based forms of IOR depends on more than just oculomotor activation, providing further support for the existence of an inhibitory cueing effect that is distinct to the manual response modality.     

A method for cross-cultural adaptation of a verbal memory assessment

Verbal memory tests—although important to the neuropsychological assessment of memory—are biased to many cultures. In the present article, we highlighted the limitations associated with the direct translation of tests and word matching, as well as the lack of ecological validity and cultural appropriateness when tests developed in one culture are used in another. To overcome these limitations, a verbal memory paradigm was developed that framed the memory assessment with a shopping-list format, but that developed culturally specific stimuli for the different language groups. The aim of the present study was to determine the equivalence of this shopping list memory test in different cultural and language groups. Eighty-three adults from English-, French-, Malay-, and Chinese-speaking cultures participated in four experiments. The results of all the experiments indicated that performance of verbal list learning is equivalent, irrespective of the language used. These results support the use of this methodology for minimizing cross-cultural test bias, and have important implications for testing culturally and linguistically diverse individuals.     

Genograms: Use in Therapy with Asian Families with Diverse Cultural Heritages

This article focuses on the ways in which genograms can be an effective psychosocial tool for use with Asian families of diverse cultural heritages. Using the case examples of Asians from three countries, viz., Malaysia, Japan, and Cambodia, the authors delineate salient therapeutic themes and map changes from a transgenerational perspective with attention to socio-cultural and political processes. An anthropological stance (Becvar, Contemp Fam Ther 30:1–2, 2008) allows a therapist to be curious about Asian family and kinship systems and join with the family in creating a new narrative that broadens spaces for living. Drawing upon surveys from three training contexts, the voices of Asian mental health practitioners, suggesting culture specific issues for the effective use of genograms with Asian families, are included.     

Navigating the Pathway to Leader Emergence in Self-Managed Work Groups Over Time: Should I Self-Promote and Try to Emerge Initially as a Leader?

Despite literature revealing the negative effects of self-promotion on important outcomes for women in interviews, there is limited attention on whether this relationship exists in a peer-to-peer context (e.g., self-managed work groups). Whereas men’s self-promotion is vital to attain interview success, work has shown that self-promoting men are not viewed favorably in a peer-to-peer setting. Moreover, most self-promotion research has focused on a single time point. It is thus a puzzle as to whether and when one should use self-promotion to emerge as a leader in a self-managed work group over time. My study addresses this gap. A longitudinal study spanning a thirteen-week period and involving 165 participants distributed across 44 self-managed work groups was performed. The results showed that, for women, there was a negative effect of self-promotion on leader emergence, and its effects subsequently accumulated. For men, self-promotion was critical to their leader emergence. The findings also indicated that emerging as a leader at the onset of a project serves as a springboard for subsequent leader emergence. Contrary to existing work, gender salience in work groups does not reduce over time. The present findings imply that managers need to be aware of possible biases in leader emergence ratings resulting from self-promotion if such ratings are utilized in their promotion decisions. Despite progressive improvements made with respect to gender-related issues over the years, societal expectations of gender norms in work groups appear to persist.

     

Effects of active navigation on object recognition in virtual environments.

We investigated the importance and efficiency of active and passive exploration on the recognition of objects in a variety of virtual environments (VEs). In this study, 54 participants were randomly allocated into one of active and passive navigation conditions. Active navigation was performed by allowing participants to self-pace and control their own navigation, but passive navigation was conducted by forced navigation. After navigating VEs, participants were asked to recognize the objects that had been in the VEs. Active navigation condition had a significantly higher percentage of hit responses (t (52) = 4.000, p < 0.01), and a significantly lower percentage of miss responses (t (52) = -3.763, p < 0.01) in object recognition than the passive condition. These results suggest that active navigation plays an important role in spatial cognition as well as providing an explanation for the efficiency of learning in a 3D-based program.