A large number of subjects was required for a series of choice-reaction experiments. An ample supply of volunteer subjects was obtained without excessive trouble by sending a circular letter to every undergraduate in Trinity College, Cambridge. Several different types of circular were compared, but none of them proved any more effective than the others. A probabilistic model is developed which accounts adequately for the times times taken by the undergraduates to reply. The discussion following covers the implication of this model, and a technical reason why the different letters should appear equally effective.
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References
1.
FellerW. (1957). An Introduction to Probability Theory and its Applications, 2nd ed.New York: Wiley Vol. 1.
2.
KendallM. G. (1945). The Advanced Theory of StatisticsLondon: Griffin.
3.
LamingD. R. J. (1962). A statistical test of a prediction from information theory in a card-sorting situation. Quart. J. exp. Psychol.14, 38–48.
4.
LamingD. R. J. (1967). The Information Theory of Choice-reaction Times E.P.S. Monograph No. 3.
5.
SiegelS. (1956). Nonparametric Statistics for the Behavioral SciencesNew York: McGraw-Hill.
6.
SnedecorG. W. (1956). Statistical Methods, (5th ed.)Iowa: Iowa State College Press.
