Sensation & Perception Research Designs

• Psychophysical Methods: 1st Focused on Detection Thresholds

• Absolute Threshold -

 

 

 

 

e.g.

 

 

 

 

 

• Difference Threshold -

 

 

 

e.g.

 

 

 

• 3 Types of Methods for measuring Thresholds

1. Method of Limits -

 

 

• Descending series:

 

 

 

 

• Ascending Series:

 

 

 

 

• Advantage:

 

 

 

 

• Disadvantage:

 

1.

 

 

2.

 

 

 

2. Method of Constant Stimuli-

 

 

 

 

 

e.g.

 

 

 

 

 

• Advantage:

 

 

• Disadvantage:

 

 

• Disadvantage:

3. Method of Adjustment -

 

 

 

 

e.g.

 

 

• Advantage:

 

• Advantage:

 

 

• Disadvantage: