Social cognitions measured in 4 to 6 year olds are predictive of objectively measured physical activity

Objective: This study tested whether social cognitions from the reasoned action approach (RAA) can be reliably measured in a sample of primary school children (aged 4–6 years) and whether these RAA measures are predictive of physical activity.

Design: Longitudinal observational study with repeated measures over six months.

Measures: RAA variables were measured using a novel choice paradigm between physically active and sedentary pastimes. Relative reinforcing value, covariates (sex, age, deprivation and BMI) and physical activity by accelerometry (primary outcome) were also measured.

Results: RAA cognitions could be measured with acceptable retest reliability and discriminant validity and social norms regarding parents and teachers (but not friends) were correlated with physical activity and change in physical activity when relative reinforcing value and other covariates were controlled for.

Conclusions: RAA cognitions can be reliably measured in primary school children aged 4–6 and RRA measures appear useful in understanding children’s activity choices and may potentially inform future interventions.     

Structural studies of ultrathin zirconia dielectrics

We present detailed structural and chemical studies on ultrathin zirconia films grown by ultraviolet oxidation and natural (no ultraviolet light) oxidation of Zr precursor metal layers on SiO2-passivated Si(100) wafers. Quantitative electron-energy-loss spectroscopy (EELS) was used to obtain the chemical composition and electronic structure on an atomic scale. The EELS OK near-edge fine structure was used as a fingerprint to study the stoichiometry and composition variation in the dielectric stacks. X-ray absorption spectroscopy studies were performed in order to aid interpretation of the EELS results. The electronic structure data are correlated with the electrical performance of the films.     

Cross-cultural similarities in category structure

Categories, as mental structures, are more than simply sums of property frequencies. A number of recent studies have supported the view that the properties of categories may be organised along functional lines and possibly dependency structures more generally. The study presented here investigates whether earlier findings reflect something unique in the English language/North American culture or whether the functional structuring of categories is a more universal phenomenon. A population of English-speaking Americans was compared to a population of Cantonese-speaking Hong Kong Chinese. The findings clearly support the view that functional influences on category centrality are universal (or at least common to Cantonese-speaking Hong Kong Chinese and English-speaking Americans), albeit with specific cross-cultural/cross-linguistic group differences in the particular properties that are considered central to categories.     

Towards an Understanding of Nurturing and Restraining Relational Patterns in School Communities

This study aimed to understand the nature of nurturing and restraining relationships in a school communiy. The inquiry entailed a single instrumental case study of a selected school community in a semi-urban context in South Africa. Participants were learners (n=720), teachers (n=33) and administrative and terrain staff members (N=8) as well as two parents. Data on participants' perceptions of relationships in the school community were collected using work sessions/nominal group techniques, visual representations, and focus group interviews. Thematic analysis of the data revealed connectedness, respect, care and transparent communication as aspects that nurture relationships. Limited connectedness between people, the abuse of power, shifting of responsibility and disrespect for one another were revealed as aspects that restrain relationships.     

Anxiety and affiliation in children

Hypotheses about the relationship between anxiety and affiliation derived from the psychoanalytic, drive, and social comparison models were tested by exposing high anxious (HA) and low anxious (LA)Ss to stress and subsequently to conditions meant to fulfill either nurturance or information needs. Unstressed and non-need fulfilled control groups were included. (N=224 grade school children.) Stress significantly increased the strength of adult affiliating in HA Ss; nurturance reduced it. Peer affiliating was not influenced by stress or information, nor did the conditions affect the affiliation of LASs. Results supported the hypothesis that dependency motives mediate the anxiety-affiliation relationship.This study is based on a doctoral dissertation completed at Yale University. The author thanks Prof. Seymour Sarason, who directed the thesis, and the children, teachers, and school psychologists of Milford, Conn. whose cooperation made this study possible.     

Social Determinants of HIV Among Men Who Have Sex with Men in Cape Town

Little is known about how social factors influence vulnerability to, and consequences of, HIV infection among men who have sex with men (MSM) in South Africa. This study aimed to analyse social stratification and its links with HIV among MSM in Cape Town, South Africa. Six interviews and six focus group discussions (n = 25) were conducted. Tools were based on the World Health Organisation’s Commission on the Social Determinants of Health framework. Directed content analysis was used to analyse data. Race and education were directly linked to social position. MSM from lower social positions were more vulnerable to HIV, and had more negative consequences of HIV infection, compared to wealthier MSM. Engagement with community leaders, health workers and police to promote inclusion could reduce vulnerability of MSM to HIV. Increased access to free, non-discriminatory HIV-related services would reduce inequities in access to HIV services by MSM.     

The fate of unattended stimuli and emotional habituation: Behavioral interference and cortical changes

The interference produced by the viewing of emotional distractors has been interpreted as evidence that emotional cues are processed in a fairly mandatory fashion, and that they divert attention from the primary ongoing task. However, few studies have examined how behavioral emotional interference varies with repeated presentation of the same emotional distractors. In two experiments, while participants were engaged in a parity judgment task, we investigated the effects of repetition of task-irrelevant emotional pictures, as reflected in both behavioral interference (Experiments 1 and 2) and neural activity (Experiment 2). Both experiments showed that the slowing of reaction times that was observed when viewing emotional, compared to neutral, scenes disappeared after only a few repetitions, suggesting diminished attention allocation to repeated emotional pictures. Conversely, in Experiment 2, neural correlates of picture processing revealed that the late positive potential (LPP) amplitude continued to be enhanced for emotional, compared to neutral, distractors despite picture repetition and the presence of a concurrent task. Altogether, these findings suggest that while evaluative processes are mandatory, and continue to engage cortico-limbic appetitive and defensive systems even after massive repetition, as suggested by the affective modulation of the LPP, attentional processes are not necessary after several repetitions of the same stimulus, as indicated by the rapid decline of behavioral emotional interference.