An assessment of intellectual development in a group of black mineworkers
- Authors: Liddle, Richard Allan
- Date: 2013-03-22
- Subjects: Piaget, Jean, 1896-1980 Intellect Gold miners -- Psychology Black people -- Intelligence levels -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3122 , http://hdl.handle.net/10962/d1006115
- Description: The aim of this research is to investigate intellectual development of a group of Black mineworkers on a South African gold mine, in the light of their exposure to a technical industrial environment. The research was conducted within a Piagetian framework and attempts to establish:- 1. A conceptual profile which would highlight the subject's conceptual abilities in relation to job skill requirements. 2. An empirical analysis of combined Behavioural and 3. Explanatory responses to support the hypothesis that experienced Black mineworkers should perform better on the diagnostic battery than novices: the main reason for this being the contention that conceptual development is facilitated by cognitive adaptation to the demands of a selectively different technological environment. Whether the battery of Piagetian conservation tasks could be evaluated for use as conservation scales with sound statistical properties. A random sample of fifty six Black mine workers was realised and their performance indicated that:- a ) The concept of Force is not actively developed by mining. b) There was no significant difference in the performance of Novice and Experienced subjects. c) The diagnostic battery in its present form is inadequate and would have to undergo some relative modifications. d) Conceptual profiles showed that concept areas tapped were not developed past the stage of Concrete operations, and that in some instances subjects did not conserve concepts which are relevant to the occupation they were selected for on the Classification Test Battery. e) Piagetian methodology could only be selectively applied to the mining industry for purposes of selection and placement. f) Conservation scales were not realised because of anomalies found in the composition of sub-concepts in the battery. , KMBT_363 , Adobe Acrobat 9.53 Paper Capture Plug-in
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- Authors: Liddle, Richard Allan
- Date: 2013-03-22
- Subjects: Piaget, Jean, 1896-1980 Intellect Gold miners -- Psychology Black people -- Intelligence levels -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3122 , http://hdl.handle.net/10962/d1006115
- Description: The aim of this research is to investigate intellectual development of a group of Black mineworkers on a South African gold mine, in the light of their exposure to a technical industrial environment. The research was conducted within a Piagetian framework and attempts to establish:- 1. A conceptual profile which would highlight the subject's conceptual abilities in relation to job skill requirements. 2. An empirical analysis of combined Behavioural and 3. Explanatory responses to support the hypothesis that experienced Black mineworkers should perform better on the diagnostic battery than novices: the main reason for this being the contention that conceptual development is facilitated by cognitive adaptation to the demands of a selectively different technological environment. Whether the battery of Piagetian conservation tasks could be evaluated for use as conservation scales with sound statistical properties. A random sample of fifty six Black mine workers was realised and their performance indicated that:- a ) The concept of Force is not actively developed by mining. b) There was no significant difference in the performance of Novice and Experienced subjects. c) The diagnostic battery in its present form is inadequate and would have to undergo some relative modifications. d) Conceptual profiles showed that concept areas tapped were not developed past the stage of Concrete operations, and that in some instances subjects did not conserve concepts which are relevant to the occupation they were selected for on the Classification Test Battery. e) Piagetian methodology could only be selectively applied to the mining industry for purposes of selection and placement. f) Conservation scales were not realised because of anomalies found in the composition of sub-concepts in the battery. , KMBT_363 , Adobe Acrobat 9.53 Paper Capture Plug-in
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A contribution to the ecology and systematics of the genus Petrotilapia (Pisces : Cichlidae) in Lake Malawi
- Authors: Marsh, Alan Clive
- Date: 2013-03-20
- Subjects: Cichlids -- Nyasa, Lake , Petrotilapia
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5355 , http://hdl.handle.net/10962/d1009513 , Cichlids -- Nyasa, Lake , Petrotilapia
- Description: The nominal species Petrotilapia tridentiger Trewavas, a rock-frequenting fish from Lake Malawi, occurs in three distinct male and female colour forms at Monkey Bay. Field observations on courtship and aggression indicate that the three colour forms are distinct species. The taxonomy of the three species of Petrotilapia that occur at Monkey Bay is revised. R. tridentiger is redescribed and two new species, P. genalutea and P. nigra, are described. The three species are very similar morphologically and are considered to be sibling species. The only morphological character which reliably separates the three sibling species is live coloration: Live coloration is considered to be an important component of the specific mate recognition systems in Petrotilapia species. The coloration of a further fourteen forms of Petrotilapia is described and it is suggested that these forms are valid species. Space resource partitioning plays an important role in facilitating the coexistence of Petrotilapia sibling species. Space is partially partitioned in terms of depth range. In shallow water, where all three species are sympatric, there are differences in the feeding sites used by the various Petrotilapia forms. Changes in niche breadth and overlap, which are associated with changes in the abundance of epilithic algae, indicate that competition for feeding space occurs between the three Petrotilapia species. The Petrotilapia species partition their resources according to a social dominance hierarchy. Dominant forms, such as territorial males, R. tridentiger females and schooling R. genalutea females, have access to rich food supplies which occur within the territories of certain highly aggressive Pseudotronheus species. are facultative and opportunistic .feeders. Petrotilapia species Speciation in allopatry is considered to be the mechanism which adequately explains the current diversity of the genus Petrotilapia. The importance of an integrative approach to future systematic and ecological research on Lake Malawi cichlids is stressed. , KMBT_363 , Adobe Acrobat 9.53 Paper Capture Plug-in
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- Authors: Marsh, Alan Clive
- Date: 2013-03-20
- Subjects: Cichlids -- Nyasa, Lake , Petrotilapia
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5355 , http://hdl.handle.net/10962/d1009513 , Cichlids -- Nyasa, Lake , Petrotilapia
- Description: The nominal species Petrotilapia tridentiger Trewavas, a rock-frequenting fish from Lake Malawi, occurs in three distinct male and female colour forms at Monkey Bay. Field observations on courtship and aggression indicate that the three colour forms are distinct species. The taxonomy of the three species of Petrotilapia that occur at Monkey Bay is revised. R. tridentiger is redescribed and two new species, P. genalutea and P. nigra, are described. The three species are very similar morphologically and are considered to be sibling species. The only morphological character which reliably separates the three sibling species is live coloration: Live coloration is considered to be an important component of the specific mate recognition systems in Petrotilapia species. The coloration of a further fourteen forms of Petrotilapia is described and it is suggested that these forms are valid species. Space resource partitioning plays an important role in facilitating the coexistence of Petrotilapia sibling species. Space is partially partitioned in terms of depth range. In shallow water, where all three species are sympatric, there are differences in the feeding sites used by the various Petrotilapia forms. Changes in niche breadth and overlap, which are associated with changes in the abundance of epilithic algae, indicate that competition for feeding space occurs between the three Petrotilapia species. The Petrotilapia species partition their resources according to a social dominance hierarchy. Dominant forms, such as territorial males, R. tridentiger females and schooling R. genalutea females, have access to rich food supplies which occur within the territories of certain highly aggressive Pseudotronheus species. are facultative and opportunistic .feeders. Petrotilapia species Speciation in allopatry is considered to be the mechanism which adequately explains the current diversity of the genus Petrotilapia. The importance of an integrative approach to future systematic and ecological research on Lake Malawi cichlids is stressed. , KMBT_363 , Adobe Acrobat 9.53 Paper Capture Plug-in
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