Alternative bases for choice in probabilistic discrimination.

On the Ecological Relevance of Psychological Research

“…Differential maximizing came next with the best fit for 20 per cent of the subjects. Essentially similar results were obtained in a study by Summers (1968).…”

From probability learning to sequential processing: A critical review.

“…The P(Ai|T 2 ) statistic decreased with increases in j3. Others (Summers, 1968) have suggested that the relative contrast of event frequencies on cue trials with overall TT may have determined the subjects' responding in Shaffer's study.…”

Learning of several simultaneous probability learning problems as a function of overall event probability and prior knowledge.

“…Two cues were used to test Atkinson's (1958) observing response model (e.g., Atkinson, 1961;Myers & Cruse, 1968) and to relate S's "strategy" to the validity of the cue (e.g., Bjorkman, 1967Bjorkman, , 1969Summers, 1968). Schipper (1967) used three cues to test Brunswik's (1939) statement that extreme probabilities (i.e., .00 and 1.00) are qualitatively different in a probability learning situation from probabilities less extreme (e.g., .10 and 0.90).…”

“…While there is some evidence that performing several independent probability learning tasks does result in overshooting (e.g., Erickson, 1966;Summers, 1968), other results indicate that the relationship is more complex. Some results (e.g., Kroll, 1967;Myers & Cruse, 1968) suggest that overshooting is more likely when one of the tasks has an event probability near 1.0 or .0; i.e., 6" is more likely to overshoot to Q, where P(^ Q) might equal .70, if P(E 1 |C 2 ) is .9 or .1 than if P(E t |C 2 ) is .5.…”