LABORATORY TESTS 135 



casually, that he had noted that I always made a better 

 judgment, the more intently he thought of the sheet. 

 Others often admitted that, when I had made an error, 

 they had not imagined the sheet vividly, or had been 

 debating whether or not to decide to think of the neigh- 

 boring sheet — the one I had designated. This indecision 

 could be noticed by the direction of the eyes. But the 

 following table shows how uniform, on the whole, was 

 the behavior of the various persons when under the 

 guidance of the same impulse. The number of tests was 

 200 in each case. All errors were of the same character. 

 Neighboring sheets were mistaken for each other, and 

 the errors were never of more than one position to either 

 side. Their number can easily be obtained by subtracting 

 the percentage of correct inferences from the total, 

 ioo7o. 



Experimenter : v. A. B. C. Mrs. v. H. K. Miss v. L. 



Correct inferences : 88^ 88^ 77^ 81^ 77^ 8z;? 



It will be seen that the number of correct interpretations 

 is quite high and in none of the cases does it deviate far 

 from the mean average of 82%. 



I based my judgment as to the direction of the subject's 

 eyes, upon an imaginary line perpendicular to the center 

 of the cornea. (This perpendicular does not always 

 coincide with the subject's line of vision, which was the 

 thing I was after, but this cannot be directly obtained. 

 This, of course, was what made the judgment a rather 

 difficult matter.) My judgment as to the direction of 

 the head I based largely on the direction of the nose, 

 (to express it more accurately : upon the direction of the 

 median plane.) I purposely noted only the position of 

 the experimenter and not the movement which led up to 



