The health status of a substantial number of South African children can be classified as “children at risk” (Luiz, 1999) as the majority of children are influenced by factors such as poverty, poor living conditions and the HIV/AIDS epidemic. These are only some of the influences that contribute significantly to the health status of South African children and consequently their development. It can thus be argued that developmental assessment is imperative in the South African context. One of the most important reasons are that children with special needs in South Africa can be identified and given the opportunity to catch up developmentally and cope successfully as opposed to those who are identified much later (Foxcroft & Roodt, 2006). Furthermore, children in South Africa must begin Grade one in the year in which they turn seven. They may only enter grade one if the school has an opening and if the necessary evidence is provided to the Department of Education that the child will be able to cope with the demands of formal schooling (Department of Education, 2002). Developmental assessment measures therefore needs to be appropriate, accurate and informative in the modern South African context. The need for a measuring instrument to assess children’s overall development and thus their developmental readiness to cope with the demands of formal schooling could be satisfied by the Griffiths Mental Development Scales – Extended Revised (GMDS-ER). This recently revised measure has not been normed on a representative, contemporary South African sample. The purpose of the study was therefore to generate information on the applicability of British norms for the contemporary South African population. This study compared and explored the performance of South African and British children aged 5-years and 6-years on the Griffiths Mental Development Scales - Extended Revised (GMDS-ER). A contemporary South African sample was obtained by testing children between the ages of 5-years and 6-years on the GMDS-ER, whilst the British sample was drawn from the United Kingdom and Eire standardization sample. The British sample was screened for normality and a similar process was followed to establish normality for the South African sample. A matched simple frequency distribution technique (taking into account age, socioeconomic status and gender as variables) was employed to approximate the equivalence between the samples. The profiles were compared by conducting an independent sample t-test with subsequent post hoc analyses to explore potential differences in the performance of the two samples. The major findings of the present study were as follows: 1. There is a significant difference between the South African and British children’s overall developmental profiles (as measured by the GMDS-ER). 2. Generally, South African children performed better on the Locomotor subscale and the Personal Social Subscale (although not statistically significant), whilst British children performed statistically better on the Language, Eye and Hand Co-ordination, and Practical Reasoning Subscales. 3. No significant differences were found for the Performance Subscale which could indicate that South African and British children’s performances on this scale are similar. Further investigations into the applicability of the GMDS-ER for the contemporary South African context are recommended and the establishment of South African norms for clinical utilization is essential. Caution with regard to the utilization of the British–based norms in the South African context is final recommendations.

Doctorat en sciences psychologiques / info:eu-repo/semantics/nonPublished

The purpose of this study was to compare the performance of children on the Wechsler Preschool and Primary Scale of Intelligence-Revised (WPPSI-R) with their performance on the Stanford-Binet Intelligence Scale: Fourth Edition (SB:FE). One hundred and four children between 3 and 7 years of age were administered both tests. A moderate correlation was found between the WPPSI-R Full Scale IQ and the SB:FE Composite Score with a Pearson product-moment correlation of .46. This correlation suggests that the two tests are not interchangeable measures of children's intelligence. They may measure different, equally important aspects of intelligence. As both tests used are relatively new, the current findings should be considered one step in the accumulation of knowledge about the usefulness of the WPPSI-R.

M.A. / Intelligence testing in cross-cultural assessment settings where traditional intelligence tests are used, often reveals inappropriate test content and invalid test scores for various cultures, language or socio-economic groups (SES). This moved some test users to conclude that traditional intelligence tests are not culture fair and are not suitably constructed for use across different cultures. As a result, these traditional intelligence tests often show invalid score variability when used across different socio-economic groups and culture. The purpose of this study was to investigate the suitability of the Snijders-Oomen Non-verbal Intelligence Test-Revised (SON-R) on a group of primary school learners from different language, socio-economic status (SES) and gender groups and grade levels in the Johannesburg metropolitan area. The aim of the study was to establish psychometric properties of the SON-R and to demonstrate that the SON-R can minimise the influence of home language, SES, age, grade level and gender on sub-test scores. Five postulates and four specific hypotheses were formulated for the purpose of the study. The sample of this study consisted of 400 primary school children from schools in Roodepoort and Melville. The test was administered to all subjects individually in their respective home languages within their school premises. Various statistical procedures, e.g. multiple analysis of variance (MANOVA), analysis of variance (ANOVA), Principal Axis Factoring, Pearson Correlation coefficients, Cronbach alpha internal consistency coefficients and post-hoc tests (Scheffe and Dunnett T3) were used to analyse the data. The findings on item difficulty analysis, in terms of the first and second mistakes committed on each sub-test, shows that items of the SON-R generally correspond to the theory of item difficulty underlying the items of the SON-R. Furthermore, the difficulty levels of the sub-test items appeared to be compatible with the cognitive levels of the subjects. The findings on the relationship of socio-economic status, age, as well as gender, with the sub-test scores were not statistically significant, indicating that sub-test scores of the SON-R were not influenced by those variables. The relationship between home language as well as grade evel with sub-test scores was statistically significant. The two variables have caused significant differences on sub-test scores of the SON-R. Cronbach alpha internal consistency coefficients were relatively high. In general, the correlation coefficients between sub-test scores and academic performance in school subjects were high, indicating significant predictive ability of the SON-R for scholastic purposes. A single factor solution for the combined group data, indicated one general factor of non-verbal intelligence for all four language groups. The study has raised research questions, which should be considered for future research on the SON-R. In general, the data has successfully supported the postulates and the specific hypotheses of the study.

M.Ed. (Educational Psychology) / This research inquiry employs the Rasch model of measurement to assess the contemporary quality of the items that constitute an intelligence test developed in South Africa during the 1980s. The Rasch model of measurement will be used as an analytical tool for exploring the quality of items constituting the performance scales of a translated version of the Junior South African Intelligence Scales (JSAIS). The JSAIS was translated into Sesotho and was used to assess grade 1 Sesotho home language learners. This study is part of the Soweto Panel Research Programme (SPRP), which aims to investigate the development of children in a specific Soweto school from preschool (grade R, age 5 and 6) to the end of the Foundation Phase (grade 3). Within this school, the research projects include the assessment of cognitive abilities, numeracy, literacy and the households of the children. I am involved in assessing the cognitive abilities of these children and work in collaboration with three Educational Psychology Master’s students from the University of Johannesburg. The cognitive abilities project aims to assess and track the cognitive development of young children from grade R to grade 3 over a period of four years. Cognitive development focuses on how children learn, process information and attain a veridical view of the world (Gopnik & Meltzoff, 1997), it entails the development of the thinking and organizing systems of the mind, and is composed of language, thinking, reasoning, problem solving, and memory development (Oakley, 2004).

The purpose of this study was to compare the WISC-R subtest score scatter patterns and obtain preliminary normative data on the WISC-R Adjunctive tests (Digit Span Forward; Digit Span Backward; Digit Supraspan; Coding Immediate Recall and Coding Delayed Recall) on a non-clinical population of South African English (n= 15) and Xhosa (n= 12) speaking, standard six children, studying in English medium schools. Tests were administered to 27 subjects, both male (n=19) and female (n=8), with a mean age of 14.1 years (range = 13.3-15.3). The results show that White English speaking children outperform Black Xhosa speaking children on Verbal, Performance and Full Scale IQs and all subtests, but that these differences tended to disappear when Full Scale IQ and school grade average were controlled for. No subtest score scatter was present for either group although more specific test items appeared to be more difficult for Xhosa speaking subjects and may have contributed to generally lowered scores. Results suggest that caution must be employed in assigning Xhosa speaking South African children to absolute IQ categories. However, the WISC-R has validity for diagnostic use on both White English speaking and Black Xhosa speaking South African children as there was no evidence of a significant Verbal IQ/Performance IQ discrepancy, or significant low subtest scatter for either group. Normative tables are presented for the use of WISC-R Adjunctive tests. / KMBT_363 / Adobe Acrobat 9.54 Paper Capture Plug-in

Despite the concept of twins and twinning being a highly explored area of research for many years, limited research has been conducted on the comparison of first and second born twin development. The nature of twins leads people to believe that twins will present with similar characteristics, however, this study explores the possibility that due to their ordinal position they could in fact present with differing characteristics and could differ developmentally. The early holistic development of a child influences the rest of their lives. Concerning twins, the development of individuality and self-knowledge is especially important. Theorists, such as Piaget (1950), propose that child development takes place in stages and that although the order in which children proceed through these stages is the same, the pace at which this takes place can vary. The necessity of monitoring the child’s journey through these stages highlights the value of child developmental assessment. This form of assessment needs to be holistic, needs to involve a multidisciplinary team of professionals and needs to utilize assessment measures that are valid, reliable, culture-fair and standardized. The Griffiths Mental Development Scales-Extended Revised (GMDS-ER) is one such measure. This study, focusing on twin development, aimed to contribute and provide valuable information to a larger research project that is currently under way aiming to increase the applicability of the Griffiths Mental Development Scales-Extended Revised (GMDS-ER) in the South African context. The primary aim of the study, however, was to explore and compare the performance of normal first born and second born twins, aged between 2 and 8 years 4 months old, on the GMDS-ER. The purpose of the study was to generate information on the relationship between first born twins’ general development and second born twins’ general development. An exploratory, descriptive quantitative design was used. Participants were selected through a combination of non-probability purposive, convenience and snowball sampling. Data was analysed using descriptive statistics and dependent sample t-tests were employed to compare the General Quotients (GQ’s) of the first and second born twins in the sample. Results showed that no significant differences were found between the first and second born twins’ general development. Information generated from this study contributed to 1) child development research; 2) twin developmental research within a South African context; and 3) a greater group of studies on the GMDS-ER, currently underway in the United Kingdom and South Africa, aiming to contribute to the international credibility of this measure

Traumatic brain injury (TBI) is the leading cause of death and disability among children and adolescents in the US. Children and adolescents who sustain moderate and severe head injuries are much more likely to evidence significant deficits in neuropsychological functioning when compared with children with mild head injuries. Information about the recovery process and functional sequelae associated with moderate and severe head injuries remains limited, despite clear indications that children who experience such injuries typically exhibit notable deficits in intellectual functioning, particularly during the acute phase of recovery. Thus, the present study was conducted to augment research on intellectual functioning in children with moderate or severe head injuries. To accomplish this, the study first examined the proposed factor model of the WISC-III in children with moderate and severe TBI. Given high prevalence rates and similar trends in cognitive impairment, particularly within the frontal lobe structures (e.g., disrupted cognitive flexibility and divided attention), the study also examined this same factor model for a group of children with attention-deficit/hyperactivity disorder (ADHD) and compared it with the model fit from the TBI group. In the second phase of the study, both the TBI and AHDH groups were evaluated to determine if distinct WISC-III index score cluster profiles could be identified. Lastly, the cluster groups for both the TBI and ADHD samples were validated using important demographic and clinical variables, as well as scores from independent neuropsychological measures of attention, executive functioning, and working memory. Parent reports of psychological and behavioral functioning were also used in an attempt to further distinguish the cluster groups. Study limitations and future research implications were also discussed.

Bibliography / Thesis (M.A.) -- Stellenbosch University, 1988.

Doctorat en sciences psychologiques / info:eu-repo/semantics/nonPublished