Every THREE SECONDS, the present moment starts over.
Three Seconds: A Temporal Platform for Conscious Activities
Pöppel, E. (2002). Three Seconds: A Temporal Platform for Conscious Activities. In: Grunwald, A., Gutmann, M., Neumann-Held, E.M. (eds) On Human Nature. Wissenschaftsethik und Technikfolgenbeurteilung, vol 15. Springer, Berlin, Heidelberg.
"...The subjective present as a basic temporal phenomenon interested psychologists for more than one hundred years (e.g.. James. 1890; Stern. 1897). We are now in a situation to indicate how long such a subjective present actually lasts. This numerical answer can be derived from a number of different experiments which all converge to a value of approximately 2 to 3 seconds. Support comes from different domains like temporal perception proper, speech. movement control. vision and audition, and also memory. All these observations suggest that conscious activities are temporally segmented into intervals of a few seconds and that this segmentation is based on an automatic (pre-semantic) integration process providing a temporal platform conscious activity.
It should be stressed that the temporal platform does not have the characteristics of a physical constant but that an operating range of approximately 2 to 3 seconds is basic to mentation ..."