EXPERIMENTAL RESULTS 



11 



TABLE I 

 COMPLETE TIME AND ERROR EECORDS FOR THE YELLOW FAMILY IN THE MAZE TEST 



In the first column is given the catalogue number, color and sex of the 

 animals. In the second are the time averages (in seconds) for the first two 

 trials; in the third, for the next five trials; in the fourth, the last ten trials, and 

 in the fifth column the average of the two preceding columns. The error average 

 for the last 15 trials is given in the last row of figures. This order is followed in 

 all the subsequent tables, but in Tables III and VI averages are added for the last 

 group of five trials, and in addition these tables give the time ad error averages 

 for two interference tests of two and ten trials respectively; a retention test of 

 ten trials, and finally the averages for the multiple choice test of 23 trials, which 

 is divided, first, into a group of the two first trials, next the following five trials, 

 next the last 18 trials, next the last 23 trials, next the last five trials, and finally 

 the error averages for the last 23 trials. 



One day's record has been omitted for mice Nos. 27, 28, 29 and 31 because 

 the poor records for that day were obviously due to a constant error, on account 

 of traveling, etc. These are the only cases where such a condition has occurred. 



(c) RESULTS FOB THE MAZE TEST 



Fig. 4 gives the complete record curves for all the tests given in 

 the maze, showing curves based upon the average and the median 

 record for each day, and, as indicated in the drawing, these may be 

 divided into three main parts: first, an initial learning period of 

 seventeen trials, second, the interference groups, consisting of two 

 and ten trials, and finally a retention test of ten trials. 183 mice 

 were tested in the first group of seventeen trials, and 71 in each of 

 the succeeding groups. 8 Two daily record curves were calculated 

 for teach test, and in the upper curve (represented in the figure by 

 a solid line and marked "average") the records for all the individ- 

 uals in each group were averaged for each successive trial, and the 



8 The tests that followed the initial learning period of seventeen trials were 

 not instigated until the experiment was well started and the writer had become 

 familiar with the peculiarities of the behavior of his subjects. Some animals 

 died during the rather long period in which they were observed, and their incom- 

 plete records, although given in the tables, are not averaged in Fig. 4. 



