Stimulus can be held in memory without loss up to one second {attention span}|. Attention changes every few seconds.
If number of objects increases {attentional load}, perceptual-task difficulty increases. If attentional load increases, inattentional blindness and change blindness increase.
While looking at location or object, people can attend to another object or place {covert attention scanning} [Rizzolatti et al., 1994].
When organisms respond to environment changes, unconscious skin responses {electrodermal response} {electrodermal activity} can happen with orienting response (OR) or to defensive response (DR). Electrical skin activity changes skin potential {endosomatic response} and skin electrical resistance or conductance {exosomatic response}.
biology
Sympathetic nervous system controls electrodermal activity.
Bulbar reticular formation stimulation inhibits electrodermal response. Amygdala removal inhibits skin conductance.
factors: sweat
Sweat affects exosomatic responses.
factors: schizophrenia
Schizophrenia patients can have no or large electrodermal response.
Before people attend to stimulus or time or space location, they mentally prepare {preattentive processing}.
People can pay attention to different stimulus parts {selective attention} [Broadbent, 1958].
6-Psychology-Cognition-Attention
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Date Modified: 2022.0225