342 Information Storage and Neural Control 



nostic category show more GSR coincidence as a pair than would 

 one of tiiese patients and a third patient in a different diagnostic 

 category?" Also of interest is the total number of overlaps for a 

 particular group. At present we are able to analyze only four 

 people at a time, even if the group is composed of 8 to 10 individ- 

 uals; but unfortunately in a four-man group or in a four-man 

 subgroup there are various degrees of "coupling" and communi- 

 cation between members that may change the number or degree 

 of coincident GSR's. For such interpretation the total GSR 

 population should be taken into account because the number of 

 overlaps must be soine function of the total number of GSR's 

 generated. In a very loosely coupled group, such as four people 

 in four different rooms without communication, there is a certain 

 probability of overlap that can be computed theoretically. A 

 somewhat more difficult theoretical problem is that of the expected 



1500 

 Sl«tt 1 



Fig. 8. Scatter Diagram Representing Approximately 50,000 GSR's Recorded in Group 

 Therapy. The number of coincident GSR's between pairs of subjects per group 

 (Sigma 2) plotted against total number of GSR's per group (Sigma 1) shows a 

 linear relationship which may be used as a baseline for interpretation and cor- 

 rection for overlap expected on a probability basis. 



