260 



LINUS WARD KLINE 



several forms of reaction time. Bergstrom (3) in his memory 

 experiments has used cards marked by words and letters. Kline 

 and Kellogg (26) have described at some length the many ad- 

 vantages of cards, and especially playing cards, for psychologi- 

 cal apparatus. Since completing the present research, there has 

 come to the author's notice the paper of Professor Washburn 

 (42) on the speed of motor learning, and Culler's '(11) card sort- 



Distri bvfion GaSe, Plan I ^ toO,Oto4>, <to<> % C>T C?. 



DIAGRAM 1. Showing the arrangement of the boxes in the Distribution Case. 

 Plan I S to D, D, to C, to C, H, to H. To be read: Spades are thrown to dia- 

 mond boxes, diamonds to club boxes, clubs to club boxes, and hearts to heart 

 boxes. 



ing experiment in his study of Interference and Adaptability. 

 The latter used " Flinch" cards. In neither case were the cards 

 stacked in a constant order. 



A distributing case 3 feet by 4 feet 8 inches was constructed out 

 of 54 individual boxes, having 6 in the vertical dimension and 9 

 in the horizontal. This arrangement furnished a box for each 

 card of the pack of 52, and at the same time preserved an ap- 



