*Doubtful Reactions* have already been defined (p.40): any
reaction word which is not found in the table in its identical form,
but which is a grammatical variant or derivative of a word found
there, is placed in this group.



Sec. 4. INDIVIDUAL REACTIONS; EXPLANATION OF GROUPS AND METHODS OF
APPLICATION.


*Normal Reactions.*--Inasmuch as the frequency tables do not exhaust all
normal possibilities of reaction, a certain number of reactions which
are essentially normal are to be found among the individual reactions.
In order to separate these from the pathological reactions, we have
compiled an appendix to the frequency tables, consisting mainly of
specific definitions of groups of words to be included under each
stimulus word in our list. This appendix will be found at the end of
this paper.

A word of explanation is perhaps due as to the manner in which the
appendix has been compiled. It was developed in a purely empirical
way, the basis being such individual reactions, given by both normal
and insane subjects, as seemed in our judgment to be obviously normal.

It must be acknowledged that the appendix falls short of all that
might be desired. In the first place, its use involves to some slight
extent the play of personal equation, and it therefore constitutes a
source of error; in the second place, it is in some respects too