6 T. L. Bolton and Donna L. IVithey "i^^H 



to press the hand forward against the cork ; this was done by 

 straightening- out the hand. The scale beam bearing the weight 

 was then raised and lowered. The amount of movement allowed 

 the hand was from one-half to three-quarters of an inch. This 

 will be known as the palm pressure with hand reaction. After 

 taking thirty-six series of observations, it was thought the steps 

 between the stimulus magnitudes were too large for the hand 

 reaction, and accordingly they were reduced from twenty to ten. 

 The series in the second set of palm pressure with hand reaction 

 presented the stimulus magnitudes represented by 150, 160, 170, 

 180, 190, 200, and 210. 



In the third set of experiments the support for the back of the 

 hand was taken away entirely and the pressure was allowed to 

 rest against the tip of the third finger. The finger and arm were 

 then made to react against the cork, raising the scale beam up 

 and down. This set will be known as finger pressure with arm 

 reaction. Observations were not taken upon the naive reagents 

 in this set. Again, the s'teps between the successive stimulus 

 magnitudes were reduced and so were represented by 150, 155, 

 160, 165, 170, 180, and 190. 



In the following tables are presented the results of each set of 

 experiments : 



Table T. Passive Palm Pressure 



S. M. means stimulus magnitudes. To the right of each stimulus mag- 

 nitude the designations S. means "same," D. S. means "doubtfully same," 

 D. H. means "doubtfully heavier," and H. means "heavier." The figures 

 represent the actual number of judgments rendered. The number of series 

 for reagent W. was 36 and for reagent B. 41. 



180 



