The thesis herein explores the relationship between early and late information in judgement and decision-making and tests a quantitative model of this relationship based on contemporary dual-process theory. The first chapter reviews literature regarding early information as a potential biasing factor in judgement and decision-making, the neglect of dual-process theory in the domain and the tendency to rely on static modelling techniques derived from economic theory. The first empirical chapter concludes that a synthesis of a static-economic decision model (prospect theory) with contemporary dual-process theory principles can better predict choice behaviour than either one approach alone. I conclude that dual-process theory provides a strong theoretical basis for understanding the cognitive processes involved in early-informational biases, but also that the quantitative approaches to modelling choice behaviour can provide valuable additional insights. The third chapter acts on this conclusion by developing a dynamic-stochastic choice model (based on a sequential sample process) which reflects four contemporary dual-process theory concepts that are relevant to early-informational biases. Simulation results of the model are presented in order to demonstrate the choice behaviour predicted by this approach. The rest of the thesis is dedicated to empirical studies designed to test the implications of these simulation results and these predicted behaviours. The empirical studies cover a range of domains including biased predecision processing during evidence gathering, stereotype bias in multi-attribute decision-making under time-pressure and the impact of expectation and accuracy motivation on visual-search decision-making. I conclude that the dynamic-stochastic modelling approach demonstrates some clear value in understanding the cognitive processes involved in these domains and the results support the use of contemporary dual-process theory as a framework for understanding judgement and decision-making. Based on this conclusion I outline some future developments for a more nuanced dynamic model including integration with a more sophisticated way of modelling type 2 processing and expansion to account for hypothetical thinking principles. I also suggest future research domains for application of the model such as expert decision-making and multi-alternative decision problems.

This thesis seeks to explore everyday aspects of time. Traditionally, the psychological study of time has been defined as the processes by which a person adapts to and represents temporal properties in order to synchronise external events. On the other hand, a good understanding of time is also vital when it comes to occupational and social organisation. How should time be considered across psychology remains an open question. While time perception is an established field in cognitive psychology, previous research has often focussed on either the perception of very short time intervals (milliseconds), or psychobiological effects of celestial time cycles (e.g. sleep/wake cycle or seasonal affective disorder). However, there remain several other aspects of time that while categorically different are no less important for example, 'mental time travel' or chronesthesia is the ability to mentally project into the future or past. While these phenomena are well acknowledged, it is only in the last few decades that research has started to document other 'higher level' cognitive processes that exist beyond traditional psychophysical constructs. By combining a range of experimental and secondary data analysis methodologies, this thesis examines the relationship between everyday units of time and systematic changes in behaviour across socially derived time cycles (i.e. the calendar week and the working day). It also considers the effects of individual differences on aspects of interpersonal organisation (e.g. punctuality and watch wearing). The main findings indicate that research into psychological time can and should go beyond minutes and seconds as present-day cognitive models are inadequate when it comes to accounting for everyday time processing errors. In addition, understanding the mechanisms behind higher-level timing processes may only become apparent if the topic makes a concentrated effort to become integrated with day-to-day cognition and behaviour. The results also have several applied implications including practical recommendations for optimising appointment systems in the National Health Service. Finally, these findings are discussed in relation to the ongoing debate regarding where psychological time research should focus future efforts if it is to maintain its current momentum from a theoretical and applied perspective.

Background: The scope of postpartum pelvic dysfunction and perineal trauma is under-researched. Instrumental vaginal delivery or 3rd/4th degree tears were recognised risk factors for pelvic/perineal dysfunction; caesarean delivery was not implicated. Aims: • To analyse obstetrical/biological factors associated with pelvic dysfunction after caesarean or non-instrumental vaginal delivery • To compare these associations between groups after determining frequencies • To evaluate severity of pelvic/perineal dysfunction, including quantifying maternal perception of the psychosocial impact Participants and Methods: 284 primiparae (184 caesarean, 100 vaginally delivered) had domiciliary, in-depth medical interviews using structured and open questioning. Results: Caesarean (elective, emergency) vs. vaginally delivered were compared: Stress incontinence manifested in 60/184 (33%, 33%) vs. 54/100 (54%), anal incontinence in 94/184 (53%, 50%) vs. 44/100 (44%), dyspareunia in 50/184 (28%, 27%) vs. 46/100 (46%), haemorrhoids in 3/184 (2%) vs. 5/100 (5%) and double incontinence with dyspareunia in 33/284 (14%, 10% vs. 12%). Sixty sustained perineal trauma. Delivery mode and non-labour factors were predictors. Severity was evaluated by devising a psychosocial measure tailored to maternal functioning. New faecal incontinence necessitated continuous perineal protection in two pre-labour caesarean and one vaginally delivered mother. Severe dysphoria was associated with incontinence (p=0.038, OR 2.334, CI 1.049, 5.192), dyspareunia (p=0.005, OR 2.231, CI 1.272, 3.914) and post-caesarean wound problems (p=0.022, OR 3.620, CI 1.203, 10.896). Incontinence impaired leisure activities (p=0.036, OR 2.165, CI 1.051, 4.463) and employment (p=0.023, OR 1.912, CI 1.093, 3.345); caesarean mode affected social-networking (p=0.018, OR 2.438, CI 1.166, 5.099) and employment (p=0.031, OR 1.967, CI 1.064, 3.636). Conclusions: Pelvic/perineal dysfunction was: ▪ Predicted by caesarean or non-instrumental vaginal delivery, with anal incontinence being more prevalent post-caesarean ▪ Comparable following elective or emergency caesarean ▪ Associated with severe and quantifiable biopsychosocial maternal morbidity.