104 EUPHA FOLEY TUGMAN 



whether or not these periods of stupidity or stubbornness come 

 at regular intervals. But she was unable to decide from the 

 data at hand. 



(e) Relation of time to failure or success of judgment. The 

 human subjects thought that the hasty judgments were more 

 often correct than the deliberate ones. The observer, as stated 

 before, kept account of the time required to make each choice. 

 Then she averaged about 500 of these times for each bird. The 

 500 times were taken as representative of the total data. They 

 include the time required to make the choice for each of a day's 

 series selected at intervals throughout the whole experiment. 

 These times were averaged — the time of the correct choices 

 in one column and the time of incorrect choices in another' col- 

 umn. The results are shown in Table VII. 



TABLE VII 



Relation of time of choice to failure and success of judgment. Average of 500 

 choices taken at random throughout the experiment. Correct choices required less 

 time than incorrect ones except in case of Female V, all of whose choices were very 

 rapid. 



Male. IV 



Time of correct choices average 28 seconds. 



Time of incorrect choices average 30 seconds. 



Female V 



Time of correct choices average 18 seconds. 



Time of incorrect choices average 17 seconds. 



Male V 



Time of correct choices average 31 seconds. 



Time of incorrect choices average 47 seconds. 



Female VI 



Time of correct choices average 1 min. 20 seconds. 



Time of incorrect choices average 1 min. 49 seconds. 



Female V made the quickest choices and gave the poorest 

 results. Male IV gave the best results and made rather hasty 

 judgments. Female VI gave the next best results and was 

 the slowest of them all in making her choices. 



It is noticeable that, with one exception, the time required to 

 make the choice was shorter for the correct choices and longer 

 •for the incorrect choices. This coincided with the opinion of 

 the human subjects. 



However, there were too few birds experimented upon to 

 draw any definite conclusions as to the relation of the time 

 required to make a choice and the success or failure of the judg- 

 ment. This is a most interesting problem for further investi- 

 gation. 



