A two-state model of simple reaction time

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untrained ones, or did not specify the kind of the subjects.
Considering the three difficulties above, the author felt
the need to carry out the series of experiments, which satisfy
the following conditions;
1) Discriminability between the FPs is not so high.
2) Lengths of the FPs are not too long and not too short.
3) Kind of the subjects is controlled. In the experiemnts
which will be reported here, all subjects are untrained at least
with respect to reaction time experiments.
4) Ranges of the FPs used in the experiments are as equal to
each other as possible.
In this dissertation, four of the experiments which were
made will be reported. Experiments I and II are concerned to
the phenomena which can be interpreted as effects of change in
expectation. Experiments III and IV are concerned to the sequential
effects.
EXPERIMENT I