PSY 3421

Lab Report

Name:     

Rat’s Name:

Session Type	Reinforcement	Extinction	Reacquisition
Session #	1	2	3	4	5	6
# of Lever Presses

Questions

1. Insert your graph here.

2. Compare the graphs of the sessions and describe any differences in the following:

a. Onset of responding as indicated by how much time passed before the first response:      

b. Rate of responding as indicated by the slopes of the lines.  A steeper slope indicates a higher rate of responding:      

c.  Pattern of responding as indicated by the shapes of the curves, including number and duration of pauses between responses, point at which responding ceases, etc.

d. What do you think these patterns of responses indicate?    

3. Describe any evidence of spontaneous recovery that you may see.      

4. Compare the rate of responding between the reinforcement sessions (1 and 2) to the reacquisition sessions (5 and 6). Why do you think there is a difference? What does this imply?