The purpose of the research was to investigate the effectiveness of using multimedia as a means of teaching physical science to learners. The underlying theoretical assumption was that a multimedia presentation would help to reduce the cognitive load experienced by learners when they learn physical science content, compared to a traditional mode of presentation, and that this reduction may have a positive effect on the ease with which they master the content. Physical science learners in Grade 11 viewed a presentation consisting of multimedia screens and screens depicting the learning content in a traditional layout – in order to compare the level of knowledge gained as well as the cognitive load experienced for the multimedia and traditional instructions. Pre- and post-test questionnaires were used to determine the knowledge gained, while cognitive load was measured using a dual-task methodology. A multivariate analysis of variance was used to analyse the data. The results did not reveal a statistically significant increase in knowledge gained via the multimedia approach when compared to the traditional mode of instruction, but when focussing the analysis on learners with a lower-knowledge base in physical science though, statistically significant results were found. However, no significant results were found to support the hypothesis that multimedia would help to reduce learners’ cognitive load. It was concluded that the multimedia design principles are more effective in increasing knowledge for physical science learners of low-knowledge than traditional instructional designs. / M. Sc. (Psychology)

Summaries in English and Afrikaans / The second fully democratic election in South Africa is scheduled to take place in May 1999. In the five years since the first election, it appears that very little attention has been paid to the political literacy of the electorate in general, and the youth in particular. The purpose of this study was to establish adolescents' level of political knowledge and whether they are able to think critically about political issues or not. The first part of the literature study which was concerned with critical thinking revealed that the major aspects of critical thinking are: deductive reasoning, inductive inference, recognition of assumptions, credibility, and problem solving. The second part of the literature study was an analysis of which factors may play a role in the development of critical thinking of an adolescent. with particular reference to a political context. The third part was an examination of important current political and social issues. These were: the new Constitution. Truth and Reconciliation Commission, housing, land redistribution, education, labour, health, crime, political violence, environment, and the next election. A reliable measuring instrument was developed in order to measure adolescents' knowledge of political issues, and their ability to think critically about these issues. The results of the empirical study revealed that intellectual potential and academic achievement were significantly related to critical thinking ability, while gender, environment, and personality appeared not to play a role. There was a significant correlation between political knowledge and critical thinking in a political context, implying that critical thinking is subject-specific. Cultural background also played a significant role in critical thinking in a political context. In terms of political knowledge, boys were found to be at a significantly higher level than girls. The subjects from urban areas were also at a significantly higher level than those from rural areas. There was also a positive correlation between intellectual potential, academic achievement, and political knowledge. Finally, some recommendations for improving the levels of political knowledge and critical thinking abilities with regard to political issues of South African adolescents were given. / Die tweede ten valle demokratiese verkiesing in Suid-Afrika is geskeduleer om in Mei 1999 plaas te vind. In die vyf jaar sedert die vorige verkiesing is baie min aandag gegee aan die politieke geletterdheid van die verkiesingspubliek in die algemeen en die jeug in besonder. Die doel van hierdie studie was om adolessente se vlak van politieke kennis te bepaal en om vas te stel of hulle in staat is om krities oar politieke kwessies na te dink. Die eerste deel van die literatuurstudie wat verband hou met kritiese denke het uitgewys dat die hoofaspekte van kritiese denke die volgende is: deduktiewe redenering, induktiewe inferensies, herkenning van aannames, geloofwaardigheid en probleemoplossing. Die tweede deel van die literatuurstudie behels 'n analise van die faktore wat 'n rol kan speel in die ontwikkeling van die kritiese denke van die adolessent, met spesifieke verwysing na 'n politieke konteks. Die derde deel is 'n ondersoek na belangrike teenswoordige politieke en sosiale kwessies. Hierdie kwessies sluit in: die nuwe Grondwet, die Waarheids- en Versoeningskommissie, behuising, herverdeling van grand, opvoeding, arbeid, gesondheid, misdaad, politieke geweld, die omgewing en die volgende verkiesing. 'n Betroubare meetinstrument om adolessente se kennis van politieke kwessies asook hul vermoe om krities daaroor na te dink, is ontwikkel. Die resultate van die empiriese ondersoek het aangetoon dat intellektuele potensiaal en akademiese prestasie betekenisvol verband hou met kritiese denkvermoe, terwyl geslag, omgewing en persoonlikheid klaarblyklik nie 'n rol speel nie. Daar is ook 'n betekenisvolle korrelasie tussen politieke kennis en kritiese denke in 'n politieke konteks wat impliseer dat kritiese denke vakspesifiek is. Kulturele agtergrond speel ook 'n betekenisvolle rol in kritiese denke in 'n politieke konteks. Ten opsigte van politieke kennis is daar bevind dat seuns op 'n betekenisvolle hoer vlak is as dogters. Respondente uit stedelike gebiede is oak op 'n betekenisvolle hoer vlak as diegene uit plattelandse gebiede. Oaar is oak 'n betekenisvolle korrelasie tussen intellektuele potensiaal, akademiese prestasie en politieke kennis. Ten slotte is aanbevelings gemaak om die vlakke van politieke kennis en kritiese denkvermoens met betrekking tot politieke aangeleenthede by Suid-Afrikaanse adolessente te verbeter. / Psychology of Education / D. Ed. (Psychology of Education)

Summaries in English and Afrikaans / The second fully democratic election in South Africa is scheduled to take place in May 1999. In the five years since the first election, it appears that very little attention has been paid to the political literacy of the electorate in general, and the youth in particular. The purpose of this study was to establish adolescents' level of political knowledge and whether they are able to think critically about political issues or not. The first part of the literature study which was concerned with critical thinking revealed that the major aspects of critical thinking are: deductive reasoning, inductive inference, recognition of assumptions, credibility, and problem solving. The second part of the literature study was an analysis of which factors may play a role in the development of critical thinking of an adolescent. with particular reference to a political context. The third part was an examination of important current political and social issues. These were: the new Constitution. Truth and Reconciliation Commission, housing, land redistribution, education, labour, health, crime, political violence, environment, and the next election. A reliable measuring instrument was developed in order to measure adolescents' knowledge of political issues, and their ability to think critically about these issues. The results of the empirical study revealed that intellectual potential and academic achievement were significantly related to critical thinking ability, while gender, environment, and personality appeared not to play a role. There was a significant correlation between political knowledge and critical thinking in a political context, implying that critical thinking is subject-specific. Cultural background also played a significant role in critical thinking in a political context. In terms of political knowledge, boys were found to be at a significantly higher level than girls. The subjects from urban areas were also at a significantly higher level than those from rural areas. There was also a positive correlation between intellectual potential, academic achievement, and political knowledge. Finally, some recommendations for improving the levels of political knowledge and critical thinking abilities with regard to political issues of South African adolescents were given. / Die tweede ten valle demokratiese verkiesing in Suid-Afrika is geskeduleer om in Mei 1999 plaas te vind. In die vyf jaar sedert die vorige verkiesing is baie min aandag gegee aan die politieke geletterdheid van die verkiesingspubliek in die algemeen en die jeug in besonder. Die doel van hierdie studie was om adolessente se vlak van politieke kennis te bepaal en om vas te stel of hulle in staat is om krities oar politieke kwessies na te dink. Die eerste deel van die literatuurstudie wat verband hou met kritiese denke het uitgewys dat die hoofaspekte van kritiese denke die volgende is: deduktiewe redenering, induktiewe inferensies, herkenning van aannames, geloofwaardigheid en probleemoplossing. Die tweede deel van die literatuurstudie behels 'n analise van die faktore wat 'n rol kan speel in die ontwikkeling van die kritiese denke van die adolessent, met spesifieke verwysing na 'n politieke konteks. Die derde deel is 'n ondersoek na belangrike teenswoordige politieke en sosiale kwessies. Hierdie kwessies sluit in: die nuwe Grondwet, die Waarheids- en Versoeningskommissie, behuising, herverdeling van grand, opvoeding, arbeid, gesondheid, misdaad, politieke geweld, die omgewing en die volgende verkiesing. 'n Betroubare meetinstrument om adolessente se kennis van politieke kwessies asook hul vermoe om krities daaroor na te dink, is ontwikkel. Die resultate van die empiriese ondersoek het aangetoon dat intellektuele potensiaal en akademiese prestasie betekenisvol verband hou met kritiese denkvermoe, terwyl geslag, omgewing en persoonlikheid klaarblyklik nie 'n rol speel nie. Daar is ook 'n betekenisvolle korrelasie tussen politieke kennis en kritiese denke in 'n politieke konteks wat impliseer dat kritiese denke vakspesifiek is. Kulturele agtergrond speel ook 'n betekenisvolle rol in kritiese denke in 'n politieke konteks. Ten opsigte van politieke kennis is daar bevind dat seuns op 'n betekenisvolle hoer vlak is as dogters. Respondente uit stedelike gebiede is oak op 'n betekenisvolle hoer vlak as diegene uit plattelandse gebiede. Oaar is oak 'n betekenisvolle korrelasie tussen intellektuele potensiaal, akademiese prestasie en politieke kennis. Ten slotte is aanbevelings gemaak om die vlakke van politieke kennis en kritiese denkvermoens met betrekking tot politieke aangeleenthede by Suid-Afrikaanse adolessente te verbeter. / Psychology of Education / D. Ed. (Psychology of Education)