Prevalence and correlates of substance use among school children in six African countries

An increasing trend of noncommunicable diseases is a worldwide phenomenon, also including the developing countries. Few studies focus on adolescents' substance use in relation to mental distress and protective factors in African countries. The purpose of this study was to assess the prevalence and correlates (mental distress and protective factors) of substance use among school-going adolescents in six African countries. The sample included 20,765 students aged from 13 to 15 years from six African countries (Kenya, Namibia, Swaziland, Uganda, Zambia, Zimbabwe), chosen by a two-stage cluster sample design to represent all students in grades 6, 7, 8, 9, and 10 in each country. The measure used was part of the Global School-Based Health Survey (GSHS) questionnaire, including various domains of health behaviour. Results indicate a prevalence of 12.6% tobacco use (past month), 6.6% risky alcohol use (two or more per day for at least 20 days or more in the past month), and 10.5% of illicit drug use (three or more times ever) in school-going adolescents in six African countries. School truancy, loneliness, sleeping problems, sadness, suicidal ideation, suicide plans, and poverty were associated with substance use (tobacco, alcohol, illicit drugs), while school attendance and parental supervision and connectedness were protective factors for substance use, and peer support protective for tobacco use. It is concluded that tobacco use, risky drinking and illicit drug use were common, clustered together and were associated with school truancy, mental distress, and lack of parental and peer support among adolescent African school children. These findings stress the need for early and integrated prevention programmes.     

A theory of the discovery and predication of relational concepts

Relational thinking plays a central role in human cognition. However, it is not known how children and adults acquire relational concepts and come to represent them in a form that is useful for the purposes of relational thinking (i.e., as structures that can be dynamically bound to arguments). The authors present a theory of how a psychologically and neurally plausible cognitive architecture can discover relational concepts from examples and represent them as explicit structures (predicates) that can take arguments (i.e., predicate them). The theory is instantiated as a computer program called DORA (Discovery Of Relations by Analogy). DORA is used to simulate the discovery of novel properties and relations, as well as a body of empirical phenomena from the domain of relational learning and the development of relational representations in children and adults.     

Learning multiplication facts: a study of children taught by discovery methods in England

The development of multiplication skills was examined in a group of children ages 8 to 12 years who were taught by discovery methods. Strategies used by the children included direct retrieval, retrieval + calculation, and counting-in-series. Repeated addition was not observed. Retrieval was the fastest and least error-prone strategy; counting-in-series was the slowest and most error prone. Children ages 8 and 9 years used mainly mixed strategies. Children ages 10 to 12 years used mainly retrieval or retrieval and calculation for low operands, but reverted to back-up strategies for high operands based on the strategies available for low operands. There was a general shift away from less effective strategies across ages 8 to 12 years but, by the end of the primary school (age 11 years), relatively few children used the most effective strategy of retrieval for all operands. The development of effective strategies was related to nonverbal reasoning ability and to working memory capacity. The results are considered with reference to experiential and pedagogical models of multiplication.     

Support and self-care: professional reflections of six New Zealand high school counsellors

In many Western societies there is increasing demand for counselling; in turn, heightened levels of support needs have been identified for counsellors themselves. Despite calls for practitioners to adopt a more proactive approach to self-care, research suggests many still pay insufficient attention to alleviating on-the-job stress or achieving ‘work–life balance’. These issues were examined within the context of inviting six high school counsellors in New Zealand to talk generally about their professional lives. The authors suggest findings support calls for counsellor education programmes to offer structured opportunities for trainees to reflect upon the task of discursively constructing professional roles.     

Physical fitness of South African primary school children, 6 to 13 years of age: discovery vitality health of the nation study

Basic physical fitness was measured using 8 different measures for 10,295 South African children and youths (5,611 boys, 4,684 girls) ages 6 to 13 years. These measurements included height, weight, Body Mass Index, standing long jump, shuttle run, sit-and-reach, sit-up (EUROFIT testing battery), and cricket ball throw scores. Due to the effects of earlier apartheid laws on separating communities, it was hypothesized that scores for different ethnic groups may differ. Therefore, in addition to the calculation of basic norms and sex differences, ethnic differences were also tested. Height and weight, relative to age, were different between the various ethnic groups (Black, White, and Mixed ancestry) for boys, with Black boys being shorter and lighter than White boys. There were no differences in sit-and-reach flexibility scores between the groups. With the exception of the cricket ball throw for girls, White children had higher scores in most tests. Although not significantly different from the White children, in the majority of cases, the children of mixed ancestral origin had scores that ranged between the other two ethnic groups. These results suggest a need for encouraging fitness in school children, and the reintroduction of formal physical education into the South African school curriculum, especially into schools in which Black children predominate.     

Aggressive rejected children: Implications for school psychologists

By a sociometric rating procedure, 32 third-grade and 32 firth-grade boys were classified as peer-rejected. Standardized teacher ratings were completed for all rejected children in order to identify those children who also exhibited clinically significant levels of aggression. A significant portion of the rejected sample at each grade were rated as highly aggressive (t score≥65). Among third graders, however, 69% of the rejected group were classified as aggressive, but only 41% of the fifth graders were similarly classified. The aggressive rejected groups at both grade levels were also rated as exhibiting lower achievement motivation and higher levels of hostile withdrawal than their nonaggressive rejected counterparts. At the fifth-grade level, nonaggressive rejected children were rated as more anxious than aggressive children. Implications for both the identification and treatment of these children are discussed.     

Accessing similarity and dimensional relations: effects of integrality and separability on the discovery of complex concepts

A series of studies investigated how stimulus integrality and separability impact the cognitive accessibility of similarity and dimensional relations. A good deal of previous work has established that stimulus integrality and separability differentially determine perception; here, the question is whether they also have differential effects on conception. Are the principles that govern perception also principles that can be readily discovered in concept learning tasks? Is a similarity-based rule especially easy to abstract from integral stimuli and a dimensionally-based rule especially easy to abstract from separable stimuli? In Experiments 1 and 2, we measured the relative ease with which the two types of rules (similarity and dimensional) are discovered by adults with the two types of stimuli (integral and separable). In experiment 1, the two rules were made redundant and we asked which rule the subjects learned. In Experiment 2, one rule was made relevant and the other irrelevant, and we compared relative speeds of learning. The results from the studies led us to conclude (a) that dimensionally based rules are more accessible from separable than from integral stimuli; (b) that similarity-based rules are more accessible from integral than from separable stimul; and (c) that, in general, subjects have a bias to access dimensional relations in this type of task. Experiment 3 pursued an additional suggestion from Experiments 1 and 2 that the dimensional relations within integral stimuli are sometimes accessible, more so when larger interstimulus differences are encountered. In confirmation, Experiment 3 demonstrated that adult subjects are more successful in applying a dimensional rule to pairs of integral stimuli that differ by a small amount if they also have exposure to pairs of integral stimuli that differ by a large amount. In a later discussion, it was argued that such a finding is consistent with the notion that the "dimensions" of integral stimuli are merely arbitrary directions in the integral stimulus space, and some relevant pilot data to that effect were presented. Finally, Experiment 4 took up a developmental issue. Young children have sometimes produced perceptual responses governed by similarity relations when presented with stimuli that are separable for adults. Will they more readily access similarity-based or dimensionally-based relations from such stimuli in the concept learning tasks here? The results showed that both kindergarteners and fifth graders more readily access the dimensional relations. A final discussion integrated the findings from the several experiments, taking up the following issues: (a) the relation between the perception and the conception of stimulus relations and (b) the nonprimacy of the dimensional axes in the integral stimulus space.     

Sequential transfer to related oddity problems by nursery school children

The initial learning and subsequent transfer of an oddity principle by children between 4 and 5 years of age were studied. The initial standard oddity problem was learned quickly by most of the children. A high level of performance was maintained on both transfer sets. The results were related to limitations placed on the oddity solutions learned by 4-year-olds by particular aspects of the original learning context.     

Ethnic and sex differences in occupational stereotyping by elementary school children

As part of the formative evaluation of an educational television and print package, fourth-, fifth-, and sixth-grade public school Black, Hispanic, and Anglo children were surveyed regarding career choice and perceptions of the appropriateness of selected occupations for male and female adults and children. Responses were analyzed by ethnic membership and sex. Results indicated that in general Hispanic and Anglo girls chose more non traditional, higher-status occupations than Black girls. For boys, however, there was no clear interaction between sex and ethnic group in career choice. Girls and boys in all three ethnic groups indicated preference for careers stereotyped for their own sex, although girls—particularly Anglo girls—showed a greater tendency to cross sex-stereotyped lines. In addition, while both girls and boys in all three groups stereotyped as appropriate only for females those occupations regarded as traditionally female, traditionally male occupations were stereotyped more frequently by boys than by girls, who tended to consider them appropriate for both sexes. No differences appeared between ethnic groups in boys' responses to male and female adult occupations. In general Black girls tended to hold the most stereotypic views of job appropriateness, while Hispanic girls did not show a clear trend. Black boys tended to stereotype more than the other two groups with reference to child jobs on a boy-stereotype scale. Some differences also appeared in both boys' and girls' responses on the basis of a median split between high and low stereotypers on boy and girl child-job stereotype scales. In general, subjects who stereotyped child jobs tended also to stereotype adult occupations, suggesting a link between the child's current experience and the more remote world of adults. Implications of the findings and suggestions for future research are discussed.