Camden McKenna

This thesis presents a novel theory of temporal experience. While time as measured by the clock is a perennially popular topic, the time of experience remains relatively neglected and poorly understood despite its centrality to our existence. This thesis therefore sets out to address the following questions: 1) How should we characterize experiential time and the experienced present? 2) How might such distinctively temporal experience arise in the first place? While the first of these is a “what is it like” question, and thus in the realm of phenomenological analysis, the second is ostensibly closer to the realm of scientific inquiry in that it concerns an empirical phenomenon. The goal of this thesis is to synthesize plausible answers to both of these questions. As to the first question, there is already a lively debate ongoing in the philosophy of mind between various camps, each offering what they see as the most plausible analysis of the phenomenology of time. Regarding the second, there is an interdisciplinary investigation of mechanisms at various levels of abstraction, notably the levels of neurophysiology and information processing. This thesis proposes, among other contentions, that the time of experience is best characterized by a combination of retentional and extensional phenomenological analyses. This means the actual temporal extension of experience and its correlates determines, to some degree, the felt temporal character of experience. At the same time, perhaps the greater part of temporal phenomenology is determined by content: mental processes can be about temporal properties in addition to their primary contents and the way they are so partially determines the temporal character of experience as well. This analysis dovetails nicely with contemporary theories of consciousness that maintain the brain is fundamentally a complex predictive engine actively and adaptively guiding behavior. The thesis thus represents a multi-level framework for understanding the experience of time and the mechanisms underpinning it. It is my hope this perspective advances the debate on time-consciousness and can guide further work towards understanding this most fundamental aspect of our lives.

I argue for constraining the nomological possibility space of temporal experiences and endorsing the Succession Requirement for agents. The Succession Requirement holds that the basic structure of temporal experience must be successive for agentive subjects, at least in worlds that are law-like in the same way as ours. I aim to establish the Succession Requirement by showing non-successively experiencing agents are not possible for three main reasons, namely that they (1) fail to stand in the right sort of causal relationship to the outcomes of their actions, (2) exhibit the wrong sort of epistemic status for agency, and (3) lack the requisite agentive mental attitude of intentionality. I conclude that agency is incompatible with non-successive experience and therefore we should view the successive temporal structure of experience as a necessary condition for agency. I also suggest that the Succession Requirement may actually extend beyond my main focus on agency, offering preliminary considerations in favor of seeing successive experience as a precondition for selfhood as well. The consequences of the Succession Requirement are wide-ranging, and I discuss various implications for our understanding of agency, the self, time consciousness, and theology, among other things.

In the flash-lag effect a non-moving object is quickly flashed directly underneath a moving object, which leads us to perceive the non-moving object as “lagging” the moving object, even though the two objects actually occupy the same horizontal position at the time of the flash. In the example above, for instance, a red square moves across a screen. At the midpoint of the red square’s journey from one side to the other, a green square is quickly presented (flashed) just below. Despite the fact that the two stimuli are presented at the same coordinates along the x axis, the stationary square is perceived as behind the moving square. The perceived lag of the flashed stationary object becomes greater when the speed of the moving object is increased and vice versa (Nijhawan 1994).

The philosophical investigation of perceptual illusions can generate fruitful insights in the study of subjective time consciousness. However, the way illusions are interpreted is often controversial. Recently, proponents of the so-called dynamic snapshot theory have appealed to the Waterfall Illusion, a kind of motion aftereffect, to support a particular view of temporal consciousness according to which experience is structured as a series of instantaneous snapshots with dynamic qualities. This dynamism is meant to account for familiar features of the phenomenology of time, such as succession, continuity, and change. Previous theories have typically appealed to a subjective present occupying an interval of time; that is, a “specious present.” I argue, through analysis of motion aftereffect illusions and the rare condition of akinetopsia, i.e. motion-blindness, that the Waterfall Illusion fails to support the dynamic snapshot theory as intended. Furthermore, I suggest that future theories of subjective time should see temporal phenomenology as the result of non-localised processes closely tied to the mechanism underlying consciousness generally.