PSYCH 140M Lecture Notes - Lecture 2: Psychoacoustics, Sensory Memory, Psych
Document Summary
Results declined varied brightness of pre-field and post-field (bright/dark) investigated brightness masking effects. Brightness of pre-field and post-field affected how rapidly performance. When pre-field and post-field are bright, performance declined very rapidly by a half-second delay, performance was no better than with whole-report method. When pre-field and post-field are dark, performance declined more slowly. It took 4 or 5 seconds to reach performance level found with whole- report method. An image immediately goes into a memory store he called visual information storage (vis), though it starts to decay fairly rapidly. This information is available to be reported through a process he called scanning. Sperling found that scanning occurs at a rate of about 1 letter every 10ms. He showed this through a pattern masking experiment. Pre-field either dark or noise made up of little scattered bits of letters (a. With dark pre-field, subjects could report an additional letter about every 10ms.
