Notes
Outline
Lecture 8

Detection and Discrimination Experiments
Martin Giese
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:"
Suggested readings:
Snodgrass, J.G., Levy-Berger, G., Hayden, M. (1985). Human Experimental Psychology. Oxford University Press, Oxford, UK. Chapter 4.
Elmes, D.G., Kantowitz, B.H., Roediger III, H.L. (1999). Research Methods in Psychology.  Brooks/Cole Publishing, Pacific Grove. Chapter 8.
Additional Literature:
Sekuler, R., Blake, R. (1994). Perception.  McGraw-Hill, New York. Appendix.
Signal Detection Theory
Signal Detection Theory
Signal Detection Theory