Behavior takes place in an environmental, or psychophysical field in which interacting forces compete until a stable state is reached. Pragnanz, a figure becomes regular, symmetical, simple, stable. Attention can be seen as directing of energy into the grouping processes. Sensation refers to immediate and basic experiences generated by isolated, simple stimuli. Perception involves the interpretation of those sensations, giving them meaning and organisation.
Cognition involves the acquisition, storage, retrieval, and use of knowledge.
Measuring a threshhold, or limen, an average value of the stimulus. Subliminal and supraliminal. JND, just noticeable difference. Techniques for evaluating perceptual processes. Generally focus on pitch, timbre, rhythm, and localization, resulting from the frequency, duration, and intensity attributes of the acoustic signal.