Several theories have stressed the importance of intersensory integration for development but have not identified specific underlying integration mechanisms. D4 synthesizes current knowledge about the development of intersensory temporal perception and applies a theoretical model based on epigenetic systems theory, proposing that responsiveness to 4 basic features of multimodal temporal experience--temporal synchrony, duration, temporal rate, and rhythm--emerges in a sequential, hierarchical fashion. The model postulates that initial developmental limitations make intersensory synchrony the basis for the integration of intersensory temporal relations and that the emergence of responsiveness to the other, increasingly more complex, temporal relations occurs in a hierarchical, sequential fashion by building on the previously acquired intersensory temporal processing skills.


Super-linear increase in ability to sustain state-of-quiet-alertness.

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