Effects of an adult's presence on the social behavior of preschool children

The social behavior of same-sex pairs of nursery school children was observed during two ten-minute play sessions. One half of the pairs played alone during both sessions, and the remaining pairs played in the presence of a passive adult supervisor. Child pairs who played alone were significantly less aggressive and exhibited a moderate but nonsignificant increase in the expression of positive or prosocial behaviors. Unsupervised pairs also tended to verbalize more and engaged in significantly more cooperative play. The absence of adults may encourage children to employ more mature social strategies to achieve a successful relationship with their playmates.     

Rorschach Comprehensive System data for a sample of 506 adult nonpatients from Argentina

This study is composed of 506 nonpatient adults, ages 18 to 65, all from Argentina. The data were gathered by five examiners, who tested most of the participants at their work site. Inclusion and exclusion criteria are described and interrater reliability statistics at the response level are presented along with findings for the Rorschach Comprehensive System (CS; Exner, 1994).     

HIV-positive pregnant women attending the prevention of mother-to-child transmission of HIV/AIDS (PMTCT) services in Ethiopia: economic productivity losses across urban-rural settings

HIV/AIDS impacts significantly on pregnant women and on children in Ethiopia. This impact has a multiplier effect on household economies and on productivity losses, and is expected to vary across rural and urban settings. Applying the human capital approach to data collected from 131 respondents, this study estimated productivity losses per HIV-positive pregnant woman–infant pair across urban and rural health facilities in Ethiopia, which in turn were used to estimate the national productivity loss. The study found that the annual productivity loss per woman–infant pair was Ethiopian birr (ETB) 7,433 or United States dollar (US$) 378 and ETB 625 (US$ 32) in urban and rural settings, respectively. The mean patient days lost per year due to inpatient admission at hospitals/health centres was 11 in urban and 22 in rural health facilities. On average, urban home care-givers spent 20 (SD = 21) days annually providing home care services, while their rural counterparts spent 23 days (SD = 26). The productivity loss accounted for 16% and 7% of household income in urban and rural settings, respectively. These high and varying productivity losses require preventive interventions that are appropriate to each setting to ensure the welfare of women and children in Ethiopia.     

Tactile gap detection and language lateralization

Recent work suggests that hemispheric language lateralization might be related to the fine-grained temporal discriminations that are required for linguistic processing (Nicholls, 1996). Studies concerning tactile processing have also shown a significant left-hemisphere (L-H) advantage for tactile gap detection (Nicholls & Whelan, 1997). We hypothesized that language and tactile processing are both preferentially processed by the left hemisphere because it is specialized for tasks requiring fine-grained temporal resolution. Thirty-two participants (16 right and 16 left handers) were tested for both linguistic processing (using the Fused Dichotic Words Test (FDWT)) and tactile gap detection. Both right and left handers showed a significant L-H advantage for both language processing and tactile gap detection. The present study supports recent claims that language lateralization is attributable to the left hemisphere's better suitability to process tasks that require fine-grained temporal resolution.     

A cognitive-behavioral analysis of parental facilitation of children's social-cognitive problem solving

The present study used a case study framework to examine ways in which parental belief systems and parental teaching strategies interact to enhance children's social-cognitive problem solving and school adjustment. The focus of the investigation was to examine the robustness of several postulated typologies of interrelationship among the key variables, as well as antecedents and consequences of means-ends problem solving exhibited by children. Four intact families with second grade children were observed in the home as they participated in discussion and decision making concerning problematic social situations. The data suggested these major points: Parental behavior was generally consistent with their beliefs; parents could most effectively elicit means-ends verbalizations from children through direct questioning; families differed in the extent to which children's inputs into family decision making were valued and the degree of interparental discord concerning beliefs and strategies. The latter points suggest a reconceptualization of how parental variables can be linked to the development of social-cognitive and behavioral competence in children. Specific implications for theory and recommendations for research are discussed.     

The importance of ‘mass’ in line drawings of faces

Previous research (Davies, Ellis and Shepherd, 1978; Rhodes, Brennan and Carey, 1987) has shown that accurate line drawings of familiar faces are identified rather poorly. However, artists can produce lifelike portraits with pen and ink, and Pearson and Robinson (1985) described an automatic method for producing computer-drawn sketches (‘cartoons’) of faces which appear very similar to those produced by a human artist. In this paper we show that subjects can identify famous faces depicted in such computer-drawn ‘cartoons’ almost as well as full grey-scale images. The cartoon algorithm comprises two components. One component draws lines at the locations of intensity changes corresponding to luminance valleys and edges (the ‘valledge’ detector). The other component applies a ‘threshold’ to the original intensity distribution, and replaces any area darker than threshold with black. Thus the full cartoon contains both ‘line’ and ‘mass’. Neither the valledges nor the threshold components alone were as well identified as full cartoons containing both components. The results suggest that the addition of the threshold component adds significantly to the identifiability of line drawings of faces.     

Patterns of adolescent involvement in problem behaviors: Relationship to self-efficacy,social competence,and life events

Using a sample of 556 adolescents from a suburban community, patterns of various adolescent problem behaviors (e.g., delinquent behavior, smoking, use of alcohol or drugs) and their links to self-efficacy, social competence, and life events were examined. Cluster analysis was conducted to identify four subgroups of adolescents who showed distinct patterns of problem behaviors. These clusters were compared on the measures of self-efficacy, social competence, and life events. Overall results suggest there are meaningful links between adolescents’ problem behavior patterns and self-efficacy, the amount and quality of participation in various after school activities, and life events. For example, a subgroup of adolescents who showed uniformly low prevalence of all problem behaviors reported more positive academic self-efficacy, more active participation in sports and nonsports activities, more positive life events, and fewer negative events than adolescents who were involved in multiple problem behaviors. Implications for prevention and future research on adolescent problem behaviors are discussed.     

“MORE” is “LESS”: Sign language comprehension in deaf and hearing children

Matched groups of deaf children of deaf parents and hearing children of hearing parents were required to indicate which of two glasses contained more or less water. The deaf comprehended the meaning of the highly iconic sign “LESS” across all ages while comprehension of the noniconic sign “MORE” was a function of age. These data, reflecting a “MORE is LESS” effect, were the reverse of the findings for the hearing given speech. When given sign, the performance of the hearing was similar to that of the deaf except for the absence of an age-related increase in “MORE” accuracy. Analyses of response biases revealed differential preferences for the two groups. Results are discussed in terms of the relative iconicity of the two signs and Clark's Semantic Feature Hypotheses.