Fig. 9.

The data from Figures 5 and 8 have been combined to produce two hypothetical stages in formation of long-term motor memory. The data points that constitute the decaying stage are the amount of anterograde interference that was recorded (as a percentage of that recorded at 5 min) as subjects attempted learning of a second field at different times. The data points that constitute the rising curve are a measure of memory retained from the first field after learning of a second field at different times.