Binding Time: A Theory of How Flexible and Adaptive Temporal Integration Shapes Perception

This thesis develops a theory of temporal binding, the process by which we temporally integrate sensory features into perceptual experiences. Psychophysical and neurophysiological findings have revealed a remarkable amount of detail into how we engage in temporal binding. However, existing theories in psychology or philosophy do not adequately account for the adaptive and flexible nature of temporal binding, nor do they explain how our capacity to engage in temporal binding connects with our experiences of time more broadly. This thesis addresses these gaps. In Chapter 1, I identify three explanatory problems that a theory of temporal binding must address. It must: (i) account for the many variables that influence temporal binding, (ii) address what I call the problems of neural delay and desynchronisation, and (iii) explicate the relation between the mechanisms underlying temporal binding and our apparent perceptual experiences of time. Chapter 2 argues that so-called brain time theories, which take temporal binding to be the result of synchrony in neural processing, fail to address problems (i) and (ii). In response, I advance my own hybrid theory of temporal binding in Chapter 3. I claim that temporal integration relies on how predictive processing and retrodictive processing are modulated by attention. This theory explains (i) and (ii) by presenting temporal binding as a flexible and adaptive hybrid process that is sensitive to goals, expectations, and actions. I present a range of consequences that follow from this. Chapter 4 addresses how the hybrid theory explains (iii) the explanatory gap between our apparent perceptual experiences of time and the dissociable and fragmented mechanisms that underlie time perception. According to the hybrid theory, our phenomenology that time is perceptually unified is imposed on the world through the attentional modulation of predictive and retrodictive processing. This explanation proposes an alternative to theories that propose the empirically implausible view that the perceived unity is inherited from unity in the mechanisms underlying time perception. While my explanation comes at the ‘cost’ of deflating the phenomenology of our perceived unity of time, these deflations are based on empirically justified arguments. Finally, Chapter 5 presents a framework for empirically testing predictions that the hybrid theory makes about temporal binding. This involves examining three questions about the relation between how the content and our apparent phenomenology of temporal binding depend on attention. I present some hypotheses concerning these questions and new animations that can be used to develop empirical tests of these hypotheses. I end by presenting multiple ways in which we may subjectively inflate the phenomenological richness of our experiences of temporal binding.