PSY 3108 Study Guide - Midterm Guide: Basilar Membrane, Absolute Threshold, Sound Intensity

• School: University of Ottawa
• Department: Psychology
• Course: PSY 3108
• Professor: Levente Orban

Document Summary

3. sound frequencies higher than the middle range also display progressively (cid:1) detection thresholds (cid:1) higher threshold values (cid:1) (cid:1) (cid:1) Provides portrayal of how sensory thresholds vary in relation to a particular stimulus parameter (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) fields (cid:1) Determinants of intensity discrimination ability: higher intensity sounds produce travelling waves of greater magnitude that in turn produce a greater spread of excitation along basilar membrane, as intensity increases, spread of excitation increases the discharge of, intensity discrimination of single tones therefore based on comparison neurons at diff points along the basilar membrane of discharge patterns across broad range of auditory neurons. Experimental procedures required subjects to rate intensity of stimulus (method of magnitude estimation) or identify pairs of stimulus intensities that generated certain ratio of loudness sensations such as half or double (method of fractionation) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1)