All-or-None versus Incremental Learning of Errorless Shock Escapes by the Rat

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Science  26 Jan 1962:
Vol. 135, Issue 3500, pp. 318-319
DOI: 10.1126/science.135.3500.318


Investigation showed that in a two-choice correction procedure the probability of an errorless response in those rats which have consistently made errors is not constant, as required by the all-or-none model, but increases with trials. Even an all-or-none model which provides for accidental error and accidental success is inadequate.