Children living with violence within the family and its sequel: A meta-analysis from 1995–2006

Based on 37 articles published in international refereed journals between 1995 and 2006, this meta-analytical review attempted to study the sequel of children living with family violence. It specifically attempted to identify the overall effect size of family violence on children's adjustment outcomes. Moderators that exerted their effects on the relationship were also studied. The overall effect size generated from the 353 study-level effect sizes was rather small (Z_r = .201). Moderating analysis on study designs, sample sources, child developmental stages and gender did not show significant heterogeneity in effect sizes, while there was significant dispersion in effect sizes among different types of child adjustment outcomes. Results of this study are basically resonant with the meta-analyses of Kitzmann et al. [Kitzmann, K. M., Gaylord, N. K., Holt, A. R., & Kenny, E. D., (2003). Child witnesses to domestic violence: A meta-analytic review. Journal of Consulting and Clinical Psychology, 71, 339–352] and Wolfe et al. [Wolfe, D. A., Crooks, C. V., Lee, V., McIntyre-Smith, A., & Jaffe, P. G., (2003). The effects of children's exposure to domestic violence: A meta-analysis and critique. Clinical Child and Family Psychology Review, 6, 171–187], but add new information in that the report source of family violence was not a significant moderator, while that of child adjustment outcomes was.     

Sensitivity to attachment, alignment, and contrast polarity variation in local perceptual grouping

A number of leading theories (e.g., Grossberg & Mingolla, 1985; Kellman & Shipley, 1991; Rensink & Enns, 1995) commonly assume that perceptual grouping by contour alignment occurs preattentively across reversing contrast polarity elements. We examined this notion in seven visual search experiments. We found that only grouping by attachment supported preattentive visual search and that grouping by contour alignment required attention in order to operate. Both attachment grouping and grouping by contour alignment were sensitive to contrast reversals. Further results showed that contour alignment was a strong grouping cue only among elements with the same contrast sign but that it did not facilitate grouping across reversing contrast. These results suggest that grouping by contour alignment operates only on inputs of consistent contrast polarity.     

Distractor interference stays constant despite variation in working memory load

Previous studies have shown that working memory (WM) plays an important role in selective attention, so that high WM load leads to inefficient distractor inhibition, in comparison with low WM load. In the present study, we examined the effect of WM on distractor processing while the extent of attentional focus was held constant. Our results show that WM load affected distractor processing only when it was positively correlated with the extent of attentional focus. When the latter was held constant, the effect of WM became negligible. Furthermore, when low WM load was paired with a wide attentional focus and high WM load was matched with a narrow attentional focus, greater distractor processing was found when the WM load was low than when it was high. These results suggest that efficient distractor inhibition may require only minimal WM resources and that the effect of WM on distractor processing is more complex than has previously been assumed.     

The virtual haptic display: A device for exploring 2-D virtual shapes in the tactile modality

In order to understand better the processes involved in the perception of shape through touch, someelement of control is required over the nature of the shape presented to the hand and the presentation timing. To that end, we have developed a cost-effective, computer-controlled apparatus for presenting haptic stimuli using active touch, known as a virtual haptic display (VHD). The operational principle behind this device is that it translates black and white visual images into topographic, 2-D taxel (tactile pixel) arrays, along the same principle using in Braille letters. These taxels are either elevated or depressed at any one time representing white and black pixel colors of the visual image, respectively. To feel the taxels, the participant places their fingers onto a carriage which can be moved over the surface of the device to reveal a virtual shape. We conducted two experiments and the results show that untrained participants are able to recognize different, simple and complex, shapes using this apparatus. The VHD apparatus is therefore ideal at presenting 2-Dshapes through touch alone. Moreover,this device and its supporting software can also be used for presenting computer-controlled stimuli in cross-modal experiments.     

Parents’ perceptions of children’s executive functions across different cities

Culture is thought to strongly influence the development of executive functions (EF), such that ethnic groups with similar cultural origins are generally assumed to exhibit comparable levels of EF performance. However, other characteristics, such as urbanization and Westernization, may also affect EF performance in societies comprising different ethnic groups, even if the ethnic groups share a similar cultural origin. The present study aimed to compare the perceptions of parents in three cities [China–Shenzhen (ZH group), China–Hong Kong (HK group), and Singapore (SG group)] regarding the EF performances of their children, all of whom share the same genetic and cultural (i.e., Chinese) origin. The study recruited 95 children aged 5–6 years (ZH group = 32; HK group = 32; SG group = 31). Their parents were invited to complete the Behavior Rating Inventory of Executive Function (BRIEF). The ZH group had significantly lower BRIEF scores compared to both the HK and SG groups. However, the BRIEF scores of the HK and SG groups only differed significantly in terms of the Organization of Materials domain. The results suggest city-related differences in parents’ perceptions of their children’s EF performances, despite their similar genetic and cultural backgrounds. We additionally discuss further interpretations of our results and the limitations of this study.     

Who Suffers More from Job Insecurity? A Meta‐Analytic Review

The present meta‐analysis examined the tenure, age, and gender differences in the relationship between job insecurity and its job‐related and health‐related consequences. A total of 133 studies, providing 172 independent samples, were included in the analysis. Our results basically replicated Sverke et al.'s (2002 ) meta‐analytic findings with an updated methodological approach and a larger database. The main differences between our findings and Sverke et al.'s are that the negative association between job insecurity and job performance was significant and that the relationship between insecurity and job involvement was smaller in our study. The moderator analysis also indicated that: (1) the positive association between job insecurity and turnover intention was stronger among employees with shorter tenure than those with longer tenure, and was stronger among younger than older employees; (2) the negative effect of insecurity on its health outcomes was more severe among employees with longer tenure than those with shorter tenure, and was more severe among older than younger employees; (3) the relationship between insecurity and the criterion variables was similar across gender. Results are discussed with reference to Hulin's (1991 ) theory of job adaptation and Greenhalgh and Rosenblatt's (1984 ) job dependence perspective. La présente méta‐analyse étudie les différences de statut (titulaire ou non), d’âge et de genre dans la relation entre l’insécurité de l’emploi et ses conséquences relatives au travail et à la santé. Un total de 133 recherches, comprenant 172 échantillons indépendants, a été inclu dans l’analyse. Nos résultats, obtenus avec une approche méthodologique actualisée et sur une plus grande base de données, sont pour l’essentiel congruents avec ceux de la méta‐analyse de Sverke et al. (2002 ). Les différences principales entre nos résultats et ceux de Sverke et al. sont les suivantes: d’une part, entre l’insécurité de l’emploi et la productivité la relation est significativement négative, d’autre part la relation entre l’insécurité de l’emploi et l’engagement au travail est moindre dans notre étude. L’analyse indique aussi que: (1) la relation positive entre l’insécurité de l’emploi et l’intention de le quitter est plus forte parmi les employés ayant un contrat à courte durée contrairement à ceux ayant un contrat à plus longue durée et est plus forte parmi les employés les plus jeunes; (2) l’effet négatif de l’insécurité sur la santé est plus important parmi les employés ayant un contrat de longue durée que pour ceux ayant un contrat de plus courte durée, ce qui est aussi le cas pour les employés les plus âgés; (3) le genre n’a pas d’effet sur la relation entre l’insécurité et les variables choisies. Les résultats sont discutés en référence à la théorie de l’adaptation au travail de Hulin (1991 ) et la perspective de dépendance au travail de Greenhalgh et Rosenblatt (1984 ).     

Enhanced Hippocampal CA1 LTP but Normal Spatial Learning in Inositol 1,4,5-trisphosphate 3-kinase(A)-Deficient Mice

To define the physiological role of IP₃3-kinase(A) in vivo, we have generated a mouse strain with a null mutation of the IP₃3-kinase(A) locus by gene targeting. Homozygous mutant mice were fully viable, fertile, apparently normal, and did not show any morphological anomaly in brain sections. In the mutant brain, the IP₄ level was significantly decreased whereas the IP₃ level did not change, demonstrating a major role of IP₃3-kinase(A) in the generation of IP₄. Nevertheless, no significant difference was detected in the hippocampal neuronal cells of the wild-type and the mutant mice in the kinetics of Ca²⁺ regulation after glutamate stimulation. Electrophysiological analyses carried out in hippocampal slices showed that the mutation significantly enhanced the LTP in the hippocampal CA1 region, but had no effect on the LTP in dentate gyrus (DG). No difference was noted, however, between the mutant and the wild-type mice in the Morris water maze task. Our results indicate that IP₃3-kinase(A) may play an important role in the regulation of LTP in hippocampal CA1 region through the generation of IP₄, but the enhanced LTP in the hippocampal CA1 does not affect spatial learning and memory.     

Reduced lateralization in verbal dichotic listening in adolescent psychopaths

One possible explanation for previous findings of abnormal linguistic processing in psychopaths is that they are less lateralized for verbal processes. This study tests the hypothesis that adolescent psychopaths show evidence of reduced lateralization on a verbal dichotic listening task. Four self-report and behavioral measures of psychopathy were used to define psychopathy using cluster analytic techniques in 40 juvenile offenders aged 13 to 18 years. Psychopaths were found to have reduced ear asymmetries relative to nonpsychopaths, a result indicating reduced lateralization for verbal material. The effect does not appear to be mediated by group differences in age, ethnic background, IQ, overall performance, left-handedness, selective attention to one ear, or interhemispheric transfer deficits. This result suggests that the previous finding by Hare and McPherson is robust, provides some preliminary validity for the assessment of psychopathy before age 18, and indicates initial support for the utility of cluster analytic techniques in the assessment of psychopathy.