A term coined by parapsychologist Charles Stuart implying
susceptibility to feedback in a situation where the subject in an
ESP test is told the score on the previous run and asked to estimate
the score on the next run. In this context, ‘‘affectable’’
subjects were those who consistently gave estimates that reflected
their score on the immediately previous run; ‘‘unaffectable
subjects’’ were not so influenced. Stuart also used the term ‘‘affectable’’
for subjects who were markedly extreme in expressing
likes or dislikes to various possible interests, while ‘‘unaffectable’’
subjects were relatively indifferent to many of these
interests. By measurement on a Stuart Interest Inventory, Stuart
claimed that unaffectable subjects appeared to score higher
than affectable on ESP perception. However, the term ‘‘affectability’’
can be applied generally to the degree of suggestibility
of a subject.
Stuart, Charles. ‘‘An Analysis to Determine a Test Predictive
of Extra-chance Scoring in Card-calling Tests.’’ Journal of Parapsychology
vol. 5 (1941).
———. ‘‘An Interest Inventory Relation to ESP Scores.’’
Journal of Parapsychology vol. 10 (1946).

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