With the maturation of the child custody investigative process, the role of investigators and the process of these investigations have come under increasing scrutiny. The investigators are expected to be objective, neutral, and professional while following procedures that conform to model standards. However, this assumption of a lack of bias has been largely overlooked in the literature regarding the investigative process. It is assumed that investigators should self-monitor to ensure that their stance is objective and neutral. Furthermore, this position of neutrality and objectivity is assumed to be intuitive and natural. By using a case study, this thesis investigates and describes the process of a child custody investigation predicated on a constructivist epistemology. It highlights the impossibility of any investigator to be objective and neutral in any investigation automatically, regardless of the procedures and methods employed. The thesis highlights the participant observer status of investigators. An aim of the thesis is thus to sensitise investigators to this inevitable vulnerability with the expectation that such an awareness may allow investigators to establish processes to render investigations consciously more balanced, considered, and transparent. A further aim is to describe a child custody evaluation from an eco-systemic perspective by contextualising the investigation in the larger ecosystem to which it belongs. This description includes the investigation as part of an evolving problem-determined system. An awareness of this wider and evolving context may enable investigators to approximate a position of objectivity and neutrality more effectively. It may also act as an inoculation against the ‘contamination’ of the investigator by the investigative system. With the maturation of the child custody investigative process, the role of investigators and the process of these investigations have come under increasing scrutiny. The investigators are expected to be objective, neutral, and professional while following procedures that conform to model standards. However, this assumption of a lack of bias has been largely overlooked in the literature regarding the investigative process. It is assumed that investigators should self-monitor to ensure that their stance is objective and neutral. Furthermore, this position of neutrality and objectivity is assumed to be intuitive and natural. By using a case study, this thesis investigates and describes the process of a child custody investigation predicated on a constructivist epistemology. It highlights the impossibility of any investigator to be objective and neutral in any investigation automatically, regardless of the procedures and methods employed. The thesis highlights the participant observer status of investigators. An aim of the thesis is thus to sensitise investigators to this inevitable vulnerability with the expectation that such an awareness may allow investigators to establish processes to render investigations consciously more balanced, considered, and transparent. A further aim is to describe a child custody evaluation from an eco-systemic perspective by contextualising the investigation in the larger ecosystem to which it belongs. This description includes the investigation as part of an evolving problem-determined system. An awareness of this wider and evolving context may enable investigators to approximate a position of objectivity and neutrality more effectively. It may also act as an inoculation against the ‘contamination’ of the investigator by the investigative system. xviii In South Africa, we have yet to formulate a document that establishes a model standard of practice or specific, dedicated training in this area. This thesis identifies what could be included in both areas (in addition to the expected protocols and procedures) by describing the investigator’s position as an expert learner, rather than just an ‘expert’. In line with current literature, it highlights the benefits of thinking consciously and in a considered manner. Furthermore, it indicates the benefits of a team approach to investigations, which could be considered an area for further investigation. In South Africa, we have yet to formulate a document that establishes a model standard of practice or specific, dedicated training in this area. This thesis identifies what could be included in both areas (in addition to the expected protocols and procedures) by describing the investigator’s position as an expert learner, rather than just an ‘expert’. In line with current literature, it highlights the benefits of thinking consciously and in a considered manner. Furthermore, it indicates the benefits of a team approach to investigations, which could be considered an area for further investigation. / Psychology / D. LITT et. Phil. ( Psychology)

À l’issue de ce travail de thèse, je propose une approche basée sur le formalisme des modèles à base de contraintes, pour étudier la dynamique d’un système métabolique. En associant l’échantillonnage de l’espace des solutions avec l’utilisation d’une contrainte de « faisabilité » entre les périodes de temps considérées, cette approche permet de modéliser la dynamique d’un système métabolique en prenant en compte la variabilité des mesures expérimentales. La contrainte de faisabilité entre les périodes permet de garantir que chaque « trajectoire solution » correspond à une succession de cartes de flux qui conduit à des cinétiques de concentrations cohérentes avec les mesures expérimentales. Les populations de trajectoires solutions générées autorisent différents types d’analyses. D’une part, les répartitions de flux prédites peuvent être utilisées afin d’estimer les répartitions de flux les plus plausibles au sein du réseau étudié. D’autre part, la distribution des concentrations prédites permet d’évaluer le modèle utilisé pour étudier le réseau métabolique. Le fait que cette approche soit basée sur le formalisme de la modélisation à base de contraintes permet, moyennant l’utilisation de l’hypothèse d’état stationnaire du système, d’étudier des réseaux métaboliques de taille relativement grande, et d’utiliser des données expérimentales qui sont aisément mesurables, par exemple les concentrations en biomasse et en métabolites extracellulaires. Cette approche par « trajectoires solutions » a été utilisée afin d’étudier la dynamique du métabolisme de Corynebacterium glutamicum, lorsqu’elle est cultivée en condition de limitation en biotine. Les résultats obtenus ont permis d’une part d’attester du fonctionnement de la méthode, et d’autre part de proposer plusieurs hypothèses quant aux phénomènes biologiques qui ont lieu pendant cette condition particulière de croissance. / In this thesis, I propose an approach based on the formalism of constraint-based models to study the dynamics of a metabolic system. By combining the sampling of the solutions space and the use of a "feasibility" constraint between the considered time periods, this approach allows to model the dynamic of a metabolic system taking into account the variability of experimental measurements. The feasibility constraint between time periods ensures that each "solution trajectory" corresponds to a succession of flux maps which leads to some kinetics of concentrations that are consistent with the experimental measurements. The generation of a population of solution trajectories allows several analyses. On the one hand, the predicted flux maps can be used to estimate the most plausible flux within the network studied. On the other hand, the distribution of predicted concentrations enables to assess the model used for studying the metabolic network. The fact that this approach is based on the formalism of constraint-based modeling allows, using the steady-state assumption of the system, to study metabolic networks of relatively large size, and to use experimental data that are easily measurable, such as biomass concentration and extracellular metabolites concentration. This approach by "solution trajectories" has been used to study the dynamics of the metabolism of Corynebacterium glutamicum, when grown under biotin-limited condition. The results allowed, first, to attest the functioning of the method, and second, to propose several hypotheses about biological phenomena that take place during this particular growth condition.

The purpose of this study was to gain a better understanding of how a problem-determined system developed around a case of drug addiction within the context of a system of relatedness. The epistemological framework informing this qualitative study was constructivism. The six participants who took part in the study represent the most prominent role players in the particular context of living. The individual battling with drug addiction, his parents, older sister, maternal grandmother and maternal aunt were interviewed. The methods of data collection employed were semi-structured interviews, a family-chronological event chart, genograms, and an eco-map. The interviews were interpreted using the hermeneutic approach. The different themes that emerged from each participant’s story were integrated in relation to each other and with respect to the collaborative sources of data. The most dominant themes extracted within this study are the initial reactions to Andrew’s drug addiction, life changes experienced due to Andrew’s drug addiction, support, as well as the meanings attributed to Andrew’s drug addiction. Further research into problem-determined systems in different cultures is recommended. / Psychology / Thesis (M.A. (Clinical Psychology)) Psychology

With the maturation of the child custody investigative process, the role of investigators and the process of these investigations have come under increasing scrutiny. The investigators are expected to be objective, neutral, and professional while following procedures that conform to model standards. However, this assumption of a lack of bias has been largely overlooked in the literature regarding the investigative process. It is assumed that investigators should self-monitor to ensure that their stance is objective and neutral. Furthermore, this position of neutrality and objectivity is assumed to be intuitive and natural. By using a case study, this thesis investigates and describes the process of a child custody investigation predicated on a constructivist epistemology. It highlights the impossibility of any investigator to be objective and neutral in any investigation automatically, regardless of the procedures and methods employed. The thesis highlights the participant observer status of investigators. An aim of the thesis is thus to sensitise investigators to this inevitable vulnerability with the expectation that such an awareness may allow investigators to establish processes to render investigations consciously more balanced, considered, and transparent. A further aim is to describe a child custody evaluation from an eco-systemic perspective by contextualising the investigation in the larger ecosystem to which it belongs. This description includes the investigation as part of an evolving problem-determined system. An awareness of this wider and evolving context may enable investigators to approximate a position of objectivity and neutrality more effectively. It may also act as an inoculation against the ‘contamination’ of the investigator by the investigative system. With the maturation of the child custody investigative process, the role of investigators and the process of these investigations have come under increasing scrutiny. The investigators are expected to be objective, neutral, and professional while following procedures that conform to model standards. However, this assumption of a lack of bias has been largely overlooked in the literature regarding the investigative process. It is assumed that investigators should self-monitor to ensure that their stance is objective and neutral. Furthermore, this position of neutrality and objectivity is assumed to be intuitive and natural. By using a case study, this thesis investigates and describes the process of a child custody investigation predicated on a constructivist epistemology. It highlights the impossibility of any investigator to be objective and neutral in any investigation automatically, regardless of the procedures and methods employed. The thesis highlights the participant observer status of investigators. An aim of the thesis is thus to sensitise investigators to this inevitable vulnerability with the expectation that such an awareness may allow investigators to establish processes to render investigations consciously more balanced, considered, and transparent. A further aim is to describe a child custody evaluation from an eco-systemic perspective by contextualising the investigation in the larger ecosystem to which it belongs. This description includes the investigation as part of an evolving problem-determined system. An awareness of this wider and evolving context may enable investigators to approximate a position of objectivity and neutrality more effectively. It may also act as an inoculation against the ‘contamination’ of the investigator by the investigative system. xviii In South Africa, we have yet to formulate a document that establishes a model standard of practice or specific, dedicated training in this area. This thesis identifies what could be included in both areas (in addition to the expected protocols and procedures) by describing the investigator’s position as an expert learner, rather than just an ‘expert’. In line with current literature, it highlights the benefits of thinking consciously and in a considered manner. Furthermore, it indicates the benefits of a team approach to investigations, which could be considered an area for further investigation. In South Africa, we have yet to formulate a document that establishes a model standard of practice or specific, dedicated training in this area. This thesis identifies what could be included in both areas (in addition to the expected protocols and procedures) by describing the investigator’s position as an expert learner, rather than just an ‘expert’. In line with current literature, it highlights the benefits of thinking consciously and in a considered manner. Furthermore, it indicates the benefits of a team approach to investigations, which could be considered an area for further investigation. / Psychology / D. Litt. et Phil. ( Psychology)

The purpose of this study was to gain a better understanding of how a problem-determined system developed around a case of drug addiction within the context of a system of relatedness. The epistemological framework informing this qualitative study was constructivism. The six participants who took part in the study represent the most prominent role players in the particular context of living. The individual battling with drug addiction, his parents, older sister, maternal grandmother and maternal aunt were interviewed. The methods of data collection employed were semi-structured interviews, a family-chronological event chart, genograms, and an eco-map. The interviews were interpreted using the hermeneutic approach. The different themes that emerged from each participant’s story were integrated in relation to each other and with respect to the collaborative sources of data. The most dominant themes extracted within this study are the initial reactions to Andrew’s drug addiction, life changes experienced due to Andrew’s drug addiction, support, as well as the meanings attributed to Andrew’s drug addiction. Further research into problem-determined systems in different cultures is recommended. / Psychology / Thesis (M.A. (Clinical Psychology)) Psychology

Disputes concerning care and contact arrangements for the minor children of divorcing couples present special challenges for professionals in the legal and psychological professions. Care and contact (custody) disputes, which are complex undertakings, are a point of debate in the professional arena in South Africa. Clinical psychologists are often included in the professional cohort that assists the high court, as the upper guardian of minor children, in the decision making process regarding contested care arrangements of children. This field is further challenged by the lack of training programmes and practice guidelines, the intense adversarial nature of disputes and litigation processes, as well as the increase in board complaints levelled against psychologists at the Health Professions Council of South Africa. These challenges contribute to the reluctance of psychologists to become involved in care and contact matters. This study therefore aimed first to explore the current practices and contributions of clinical psychologists in care and contact disputes in South Africa, and second to evaluate the procedures used by clinical psychologists to inform their recommendations to the court. In such matters, clinical psychologists adhere to the best interest of the child (BIC) principle. The final aim of the study was to identify and propose guidelines for a model of better practice. The study was guided by a Constructivist Epistemology and a Social Constructionist paradigmatic framework. A qualitative research approach was employed. Data were collected through face- to-face interviews with clinical psychologists and advocates and were analysed using Thematic Network Analysis of Attride-Stirling. The findings, which indicated that that the practices of psychologists are plenteous, revealed significant shortfalls in current practices. In addition, the findings designated that creating a universal model for care and contact evaluations to fit with the legal professions’ empiricist tendency poses a paradigmatic dilemma and a practical challenge. A position of observer-dependence and a reflective position on the part of the psychologist is instead indicated. / Psychology / Ph. D. (Psychology)