Time does not pass at constant speed in subjective experience. This common observation has been documented for a long time. What is less documented is the relationship between the quality of the inner state — notably the level of cognitive load — and the specific modifications of subjective duration.
Principal observations
Under high cognitive load, subjective time contracts. Periods of intense engagement in a complex task are experienced as brief. With attention fully mobilised by content, the processing of the temporal flow itself is put on standby. This is not “presence” — it is absorption.
In a state of passive monitoring — waiting without particular content — subjective time dilates. Each moment is processed separately, without fluid integration into a flow. Boredom produces a systematic overestimation of duration.
In a state of active inner observation, subjective duration tends toward a form of neutrality. Trained subjects report a more equitable relationship with time, less dependent on the content of experience.
Absorption in a task and observational presence are two distinct states, although superficially similar in their relation to time. One is a disappearance of the observer. The other is its continuous availability. This distinction has practical implications for anyone seeking to evaluate the quality of their experience at work or outside it.