PSYC 212 Lecture Notes - Lecture 8: Response Bias, Central Tendency, Haloperidol

• School: McGill University
• Department: Psychology
• Course: PSYC 212
• Professor: Mathieu Roy

Document Summary

Time: the indefinite continued progress of existence and events that occur in apparently irreversible succession from the past through the present to the future: the fourth dimension, whatever the clock reads. Vierordt"s law: experiment participants have to guess amount of time btwn 2 claps, shorter intervals are overestimated, longer intervals are underestimated, there is an indifference point for which time is perfectly estimated. Perceived present: the indifference point is representative of the perceived present, events outside this range fall into the past or future. Central tendency: response bias towards the mean of the presented intervals, reason for vierordt"s law inconsistent. Scalar properties of interval timing: estimation error increases in proportion to the target interval, the ratio of error/mean is a constant, adheres to weber"s law. Effects of dopamine: amphetamines speed up the internal clock, haloperidol (dopamine antagonist) slows down internal clock. Auditory stimuli are perceives as longer bc hearing automatically captures attention but visual stimuli requires controlled attention.