β Scribed by Wason, P. C.
No coin nor oath required. For personal study only.
Two experiments were carried out to investigate the difficulty of making the contra-positive inference from conditional sentences of the form, βif P then Q.β This inference, that not-P follows from not-Q, requires the transformation of the information presented in the conditional sentence. It is suggested that the difficulty is due to a mental set for expecting a relation of truth, correspondence, or match to hold between sentences and states of affairs. The elicitation of the inference was not facilitated by attempting to induce two kinds of therapy designed to break this set. It is argued that the subjects did not give evidence of having acquired the characteristics of Piaget's βformal operational thought.β
π SIMILAR VOLUMES
In a companion paper [1] we described the concept of saturation, the situation in a program in which so many knowledge sources (KSs ) are potentially useful at each invocation cycle that it is unrealistic to consider unguided, exhaustive invocation. We argued that saturation appears almost inevitabl
This study investigated adolescent offenders' (81 felons and 83 misdemeanants) evaluations of three types of societal rules (moral, conventional, and personal) on dimensions pertaining to importance, sanctions, authority, and individual choice. In addition, participants selected the acts which shoul