Psychology 2115A/B Lecture Notes - Lecture 5: Cross-Matching, Matched Grip

• School: Western University
• Department: Psychology
• Course: Psychology 2115A/B
• Professor: Stephen Lupker

Document Summary

What is the relationship between the physical intensity and psychological response (3rd q) Indirect scaling- not asking people to give responses to stimuli, but deriving the relationship on his own. Log fn"s: differences in low end of intensity, big psychological impact. High end differences in intensity, less psychological impact. Take a stimulus, and instead of asking for a number for it, vary how hard they grip a gadget that measures hand grip fore. match grip with loudness. So instead of making a number response to a loudness or brightness, use grip force. So, equate hand grip force and, in stevens" case, heaviness. Used the equation for hand grip (n=1. 7), and the equation for heaviness(n=1. 45) What you"re doing now is equating them, cross matching them. Their psychological responses should be equivalent if this is true, which is why you can equate them. 1. 45 log ph = 1. 7 log pg.