PSYC 3270 Lecture Notes - Lecture 1: Franciscus Donders, Probability Distribution, Logarithm

• School: York University
• Department: Psychology
• Course: PSYC 3270
• Professor: Laurie Wilcox

Document Summary

Precision repetition: steep slope = high precision (low variability) Accuracy near from the true point/value. Measure the absolute sensitivity: away from the response criteria. One intensity stimulus or no stimulus: hit, miss, false alarm, correct rejection, payoffs. Roc curve (receiver operating characteristic curve: percentage of hits vs percentage of false alarm, probability distributions. Law = constant the size of the ratio: lower number, higher sensitivity. Perceived magnitude & stimulus intensity: suprathreshold one = perceived magnitude. Power function: response expansion, response compression. Standard stimulus: all subsequent stimuli are rated relative to the standard. Logarithm: slopes can be used to compare performance across modalities. Donders: timing of mental processes, measure various mental processes by measuring the amount of time taken to complete certain tasks, the timing of neural activity in response to stimulus is additive, 1. Simple reaction time time taken to detect a stimulus: 2. Response depends on the identity/characteristic of the stimulus.