Psych 2115A Nov. 28 2012
o Is there a limit to the number of things perceived?
o Perception is not a capacity process, does not require attention.
Span of perception
Limited capacity perception
Everything is perceived
Present cue soon enough after stimuli are presented, people perceive all.
Showed a bunch of stimuli, presented cue.
Made participant report only some of the stimuli and they were successful
which means since they didn’t know which stimuli they would be asked,
they must attend to all.
Stimulus Sensory Memory Memory
4, 8, 12 or 16 stimuli presented. Was there a T or an F in stimulus?
People did worse as number of things increased
o i.e., did worse with 16 than 4.
Estes and Taylor 1964
o Sensory memory exp. is too simple
Stimulus Sensory Memory Some Memory Short Term
o A person perceives everything but we get a roadblock in deciding what was
o Not limited but unlimited
o T/F detection test. 3 Conditions 1. T 80% correct. 1 perceive 1 decision
2. . O T 80% Correct. 4 perceive 1 decision
3. T T 40% Correct. 4 perceive 4 decision
Participants were convinced there
was neither a T nor an F and that,
T T in fact, they were all hybrids.