Stimulus- response compatibility and the rate of gain of information

Fifty-four Ss responded vocally at three levels of stimulus uncertainty to visually presented Arabic numerals. Responses were paired with stimuli in three ways to create ensembles that demonstrated high, intermediate, and low S-R compatibility effects. RT was found to be an increasing linear function of the amount of information transmitted (Ht); the degree to which RT is influenced by Ht was found to be an inverse function of the degree of S-R compatibility.