Senile dementia 4 "


A comparison of our pathological with our normal material _en
masse_ reveals in the former evidence of a weakening of the normal
tendency to respond by common reactions. This is shown in Table II.


TABLE II.

Common Doubtful Individual
reactions. reactions. reactions.
1,000 normal subject 91.7% 1.5% 6.8%

247 insane subjects 70.7% 2.5% 26.8%


It seems evident from this that pathological significance attaches
mainly to individual reactions, so that our study resolves itself
largely into (1) an analysis and classification of individual
reactions and (2) an attempt to determine what relationship, if any,
exists between the different types of reactions and the different
clinical forms of mental disease.



Sec. 2. CLASSIFICATION OF REACTIONS.


Those who have attempted to use the association test in the study of