The main objective of this thesis was to examine gender differences in co-rumination using observational, experimental, and diary methods. At the start of this project there were no existing studies which had assessed co-rumination in this way and this thesis intended to be an exploratory investigation of co-rumination using these methods. Rose (2002) defined co-rumination as ‘excessively discussing problems within a dyadic relationship’ (p. 1830) and used it to explain why females have closer, more supportive, friendships (Rose & Rudolph, 2006) but are also more susceptible to depression (Weissman & Klerman, 1977). Her findings suggest that co-rumination has maladaptive outcomes for females (increased depression and anxiety) but not for males. The six studies within this thesis aimed to investigate the outcomes of co-rumination using adult (Studies 1- 4), adolescent (Studies 5 and 6) and child samples (Study 6). The first three studies within this thesis assessed co-rumination using dyadic analyses of observational and experimental data. The results of these studies indicated that scores from the co-rumination questionnaire (CRQ) and the co-rumination coding scheme (CRCS) were associated with affect, but that the co-rumination manipulation used in Study 3 had no effect on levels of affect. CRCS was mainly predictive of depressive outcomes whereas CRQ was predictive of both depressive and anxious outcomes. The research indicated that CRQ scores positively correlated across the two dyad members. However, each dyad member’s score showed different associations with affect, depending on whether the dyad member was presenting his or her own problem for discussion. The diary studies indicated that co-rumination was best assessed using daily items which were more predictive of changes in positive and negative affect than the CRQ. It was clear from the studies within this thesis that co-rumination did not only have negative outcomes for females, and that future research should examine the outcomes of co-ruminative discussions for males and females. It was suggested that future researchers should conduct similar experimental research to Study 3 but that they should include multiple co-ruminative interactions and more immediate assessments of co-rumination in the days following a co-ruminative interaction.

This thesis addresses decision mechanisms in foraging situations, using laboratory experiments with European starlings (Sturnus vulgaris). Building on previous work from the Behavioural Ecology Research Group, I chose the Sequential Choice Model (SCM; reviewed in Kacelnik et al., 2011 − Appendix 1) as a starting point, and tested its premises and predictions generalising it to different experimental protocols. Classical decision models do not relate choice preferences to behaviour towards isolated options, and assume that choices involve time-consuming evaluations of all alternatives. However, previous work found that starlings’ responses to isolated options predict preference in choices, and that response times to single-option encounters are not reliably longer than response times in choices. Since, in the wild, options are normally encountered sequentially, dealing with isolated options can be considered of greater biological, and possibly psychological, significance than simultaneous decisions. Following this rationale, the SCM postulates that when multiple simultaneous stimuli are met they are processed in parallel, each competing against the memory of background opportunities, rather than comparing present options to each other. At the time of launching this research, these ideas had only been applied to protocols involving just two deterministic alternatives and offering no chance to explore the influence of learning history (i.e., how animals learn to choose; see Chapter 4). To increase their relevance and offer more rigorous tests, I generalised them to situations with multiple (see Chapters 2, 4 and 5), and in some cases probabilistic alternatives (see Chapter 3), controlling the learning regime. I combined these extensions with tests of economic rationality (see Chapter 6), a concept that is presently facing sustained debates. Integrating the result of all experimental chapters (see Chapter 7), my results support the notion that behaviour in single-option encounters is fundamental to understand choice behaviour. The important issue of whether choices involve a decision time cost or the opposite, a shortening of response times, remains unsolved, as neither could be evidenced reliably.

This thesis investigates individual and interpersonal predictions of future affect and explores their relation to implicit theories of emotion, prediction recall, debiasing, and focalism. Studies 1, 2, and 3 assessed affect predictions to upcoming reasoning tests and academic results, and Studies 4, 5, and 6 concerned predictions for self-identified events. The first study investigated the influence of implicit theories of emotion (ITE; Tamir, John, Srivastava, & Gross, 2007) on impact bias and prediction recall manipulating ITE between participant pairs who predicted and reported their affective reactions to feedback on a test of reasoning skills. Neither impact bias nor recalled predictions were affected by the manipulation. Recalled affect predictions differed from original affect predictions, but were not influenced by experienced affect. Study 2 further investigated the effects of target event timing on impact bias and affect prediction recall. The results showed no differences between individual and interpersonal impact biases across conditions. Again, recalled predictions differed from original predictions, and were not influenced by experienced affect. Study 3 investigated the influence of prior information about impact bias on interpersonal affective forecasting involving real-world exam results. The results demonstrated no differences in predictions due to information, however, significantly less unhappiness was predicted for participants’ friends compared to self-predictions. Study 4 examined the effect of different de-biasing information on affective predictions. The results demonstrated no differences in affective predictions by condition and found that participants’ ITE were not associated to affect predictions. Study 5 examined individual and interpersonal affect predictions using a between-subjects design in place of the within-subjects design. The results demonstrated no differences between the affect predictions made for self and for friends, and ITE were not associated with predictions. Study 6 examined the impact bias in interpersonal affective forecasting and the role of focalism. The results demonstrated distinctions between individual and interpersonal affecting forecasting with individual impact bias for positive reactions for negative events and individual and interpersonal reverse impact bias for calm emotional reactions to positive events. Immune neglect was found not to be associated with predictions. Overall, the studies found evidence for similar individual and interpersonal predictions which are resistant to influence.

The historically black and historically white universities in South Africa were shaped by apartheid policies. Within this socio-political context the project started when I, who was a lecturer at a historically black university (HBU), was confronted by violent interactions between lecturers and students, and a perceived passivity on the part of management when lecturers were threatened by students with violence in social and academic settings. Based on socio-historical factors and my personal experiences, I explored the experiences of lecturers at an HBU, i.e. their relationship with students and management, to form an understanding about how the lecturers’ experiences influenced the unconscious dynamic processes of the intergroup transactions between themselves and the students and management. A qualitative research method was chosen because it allowed for the in-depth analysis and interpretation of the lecturers’ experiences in a particular HBU. Hermeneutic phenomenology, using the systems psychodynamic perspective, allowed for the description and interpretation of the lecturers’ experiences. Data collection entailed hermeneutic conversations with the nine lecturers from an HBU. In the analysis, interpretation and reporting of the findings, the interpretive stance proposed by Shapiro and Carr (1991) was used. This analysis and interpretation entailed a collaborative dimension – the analysed data was sent to the lecturers to ascertain whether the analysis was a reflection of their experiences, as well as to experts in the systems psychodynamic perspective to ascertain whether the interpretations were plausible. The relationship between students, lecturers and management was contradictory, because it was marked by hope for an effective working relationship and by continuing conflict and violence – resulting in the (k)not of relationship based on the (k)not of achievement apparent in the lecturers’ relationship with students, and the (k)not of performance evident in their relationship with management. The intergroup transactions between students, lecturers and management were marked by a reign of terror as threats of violence, or actual physical violence, were directed at lecturers by students with little or no intervention by management. By integrating the findings with systems psychodynamic literature, several working hypotheses and two research hypotheses regarding the (k)not of relationship between the three stakeholders were generated. / Psychology / D.Litt. et Phil. (Psychology)

The historically black and historically white universities in South Africa were shaped by apartheid policies. Within this socio-political context the project started when I, who was a lecturer at a historically black university (HBU), was confronted by violent interactions between lecturers and students, and a perceived passivity on the part of management when lecturers were threatened by students with violence in social and academic settings. Based on socio-historical factors and my personal experiences, I explored the experiences of lecturers at an HBU, i.e. their relationship with students and management, to form an understanding about how the lecturers’ experiences influenced the unconscious dynamic processes of the intergroup transactions between themselves and the students and management. A qualitative research method was chosen because it allowed for the in-depth analysis and interpretation of the lecturers’ experiences in a particular HBU. Hermeneutic phenomenology, using the systems psychodynamic perspective, allowed for the description and interpretation of the lecturers’ experiences. Data collection entailed hermeneutic conversations with the nine lecturers from an HBU. In the analysis, interpretation and reporting of the findings, the interpretive stance proposed by Shapiro and Carr (1991) was used. This analysis and interpretation entailed a collaborative dimension – the analysed data was sent to the lecturers to ascertain whether the analysis was a reflection of their experiences, as well as to experts in the systems psychodynamic perspective to ascertain whether the interpretations were plausible. The relationship between students, lecturers and management was contradictory, because it was marked by hope for an effective working relationship and by continuing conflict and violence – resulting in the (k)not of relationship based on the (k)not of achievement apparent in the lecturers’ relationship with students, and the (k)not of performance evident in their relationship with management. The intergroup transactions between students, lecturers and management were marked by a reign of terror as threats of violence, or actual physical violence, were directed at lecturers by students with little or no intervention by management. By integrating the findings with systems psychodynamic literature, several working hypotheses and two research hypotheses regarding the (k)not of relationship between the three stakeholders were generated. / Psychology / D.Litt. et Phil. (Psychology)