Below you will see the data from a learning experiment. There are 20 rats (S1, S2, S3, etc) who ran through a maze for ten trials sessions (on ten different days). The numbers in the body of the graph represent the percentage of trials on that day that the rat successfully completed the maze. Compute the learning curve for the data below where Day Number is the X-axis and Percentage Completed is the Y-axis. To figure out the percentage completed for each day number add up the percentages for all the subjects on that day number and divide by the number of subjects.

DAY NUMBER

1 2 3 4 5 6 7 8 9 10

S1 0 0 100 100 100 100 100 100 100 100

S2 0 100 100 100 100 100 100 100 100 100

S3 0 0 0 0 100 100 100 100 100 100

S4 0 0 0 0 0 0 100 100 100 100

S5 0 100 100 100 100 100 100 100 100 100

S6 0 0 0 0 0 0 0 0 0 100

S7 0 0 0 0 0 0 0 0 0 0

S8 0 0 0 0 100 100 100 100 100 100

S9 0 100 100 100 100 100 100 100 100 100

S10 0 100 100 100 100 100 100 100 100 100

S11 0 0 0 0 0 0 0 0 0 0

S12 0 0 0 0 0 100 100 100 100 100

S13 0 0 0 0 0 0 0 100 100 100

S14 0 0 0 0 100 100 100 100 100 100

S15 0 0 0 100 100 100 100 100 100 100

S16 0 100 100 100 100 100 100 100 100 100

S17 0 0 0 0 100 100 100 100 100 100

S18 0 0 0 0 0 0 0 0 0 0

S19 0 0 0 0 100 100 100 100 100 100

S20 0 0 0 100 100 100 100 100 100 100

Questions:

1. Compute the Day Number by Percentage Completion Learning Curve for the Above Data--- as discussed in the opening paragraph.

2. When you look at an individual subject, say rat S4 what does his data suggest about how he learned the maze?

3. What does the overall learning curve computed in Question #1 suggest about the nature of learning?