Time to perceive an event (e.g. percieve pattern of letter S )
MHP says: Response time of perceptual processor is proportional to intensity of stimulus Information is stored in memory according to the type of stimuli (e.g. acoustic, visual) Information ‘decays’ from working memory and may be stored in long term memory
Period: About 100msec
Measurement Measure by determining smallest perceivable event (e.g. moving image on film)