A note on the alternation of guesses.

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Abstract
In one experiment, 192 students guessed five times in a row what side of a coin the experimenter was looking at. One group guessed once every 20 sec., one group once every 8 min. In a control series, both groups wrote longer responses with the non-preferred hand to increase the effortfulness of the task. In a second experiment, 58 students pressed one of two levers, trying to press the one the experimenter was "thinking about." Part of the group responded every 25 sec., part every 5 sec. "The predictions made on the basis of reactive inhibition postulates or responseproduced negative drive stimuli were not substantiated by our experimental evidence . . … One conclusion would appear to be that the subjects were responding on the basis of higher verbal processes, involving personal conceptions of the nature of 'chance' . . … The problem in demonstrating the operation of negative drive stimulation would appear to involve the use of a task that was so effortful that it would outweigh the verbal biases of the subjects." (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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