Lecture 8
Detection
and Discrimination Experiments
What you should learn
today
A Detection Experiment
Detection Experiment:
Results
Detection Experiment:
Interpretation
Detection and
Discrimination Experiments
Psychophysics
Psychophysics
Possible Measurements
Psychometric Function
(for Detection)
Psychometric Function:
Quantification
Psychometric Function:
Quantification
Difference Thresholds
(for Discrimination)
Difference Thresholds:
Quantification
Difference Thresholds:
Quantification
Weber’s Law
Fechner’s Law
Fechner’s Law
Psychophysical Functions
Psychophysical Functions
Classical Methods of
Psychophysics
Fechner’s Classical
Methods
Fechner’s Classical
Methods
Fechner’s Classical
Methods
Fechner’s Classical
Methods
Staircase Method
Staircase Method
Forced Choice Methods
Forced Choice Methods
Forced Choice Methods
Forced Choice Methods
Influence of the Response
Criterion
Slide 33
Theories about Thresholds
Models for Thresholds
Models for Thresholds
Signal Detection Theory
Signal Detection Theory
Models for Thresholds
Receiver Operating
Characteristics (ROC)
Receiver Operating
Characteristics (ROC)
Receiver Operating
Characteristics (ROC)
Receiver Operating
Characteristics (ROC)
Scaling Methods
Magnitude Estimation
Power Laws
Power Laws
Power Laws
Power Laws
Multi-dimensional Scaling
Multi-dimensional Scaling
"Suggested readings:"
Signal Detection Theory
Signal Detection Theory
Signal Detection Theory