SHS 311 Final Test Questions with 100%
Correct Answers
What are objective and subjective psychophysics?
Objective Psychophysics
- Tasks: detection, discrimination, recognition
- Goal: What can a listener hear?
Subjective Psychophysics
- Tasks: sensory scaling, matching
- Goal: what does a listener hear?
Define absolute and difference thresholds
- Absolute threshold: the stimulus amplitude that an observer can barely detect
- Difference threshold: the minimum change from a constant stimulus parameter value that
produces a noticeable perceptual difference
What is a psychometric function? How is threshold computed on a psychometric
function?
- psychometric functions relate a measure of listener's performance (percent of time that a
stimulus
is detected) to a measure of the stimulus (stimulus intensity level)
- thresholds are derived from psychometric functions (ex: the level at which the stimulus is
detected 50% of the time)
What is the limitation of the method of constant stimuli?
response bias
Correct Answers
What are objective and subjective psychophysics?
Objective Psychophysics
- Tasks: detection, discrimination, recognition
- Goal: What can a listener hear?
Subjective Psychophysics
- Tasks: sensory scaling, matching
- Goal: what does a listener hear?
Define absolute and difference thresholds
- Absolute threshold: the stimulus amplitude that an observer can barely detect
- Difference threshold: the minimum change from a constant stimulus parameter value that
produces a noticeable perceptual difference
What is a psychometric function? How is threshold computed on a psychometric
function?
- psychometric functions relate a measure of listener's performance (percent of time that a
stimulus
is detected) to a measure of the stimulus (stimulus intensity level)
- thresholds are derived from psychometric functions (ex: the level at which the stimulus is
detected 50% of the time)
What is the limitation of the method of constant stimuli?
response bias
