18 



ROBERT M. YERKES 



Below are presented for each of the several problems (1) the 

 numbers of the settings presented in series; (2) the numbers of 

 the doors open ; (3) the number of doors open in each setting and 

 for the series of ten settings; and (4) the number of the right door. 



First mechanism at left of group 



No. of 

 doors open 

 ..3.. 

 ..2.. 

 -.5.. 

 ..3.. 

 ..5.. 

 ..3.. 

 ..3.. 

 ..5.. 

 ..3.. 

 ..3.. 



Total 35 



No. of 

 right door 

 ..1 

 ..8 

 ..3 

 ..7 

 ..2 

 ..6 

 ..5 

 ..4 

 ..7 

 ..1 



Problem 2. Second mechanism from the right end of group 



No. of 

 right door 

 .8 

 .3 

 .6 

 .5 

 .7 

 .2 

 .4 

 .8 

 .3 

 .7 



Total 50 



Problem 3. Alternately the first mechanism at the left and the first at 

 the right end of the group 



Total 50 



