15 



10 



Sig. 8 

 BPPECT 0? rSIAL. CONTINUATIOt^ ON TIME SPPICISNCY 

 0? SIX SIXTY-PIVS DAY RATS 



o 10 15 20 25 27 



TESTS 

 Each point on the curve rsprsssnts bhs average for 16 trials 

 167 trials shown here as 27 



The asterisk (*) indicates the point of efficiency which had been reached 

 in the learning proper, i.£,,the last six trials of learning. 



