Three experiments were conducted within the framework of correspondent inference theory. In each of the experiments the subjects were instructed to estimate the “true” attitude of a target person after having either read or listened to a speech by him expressing opinions on a controversial topic. Independent variables included position of speech (pro, anti, or equivocal), choice of position vs. assignment of position, and reference group of target person. The major hypothesis (which was confirmed with varying strength in all three experiments) was that choice would make a greater difference when there was a low prior probability of someone taking the position expressed in the speech. Other findings of interest were: (1) a tendency to attribute attitude in line with behavior, even in no-choice conditions; (2) increased inter-individual variability in conditions where low probability opinions were expressed in a constraining context; (3) that this variability was partly a function of the subjects' own attitudes on the issue; (4) that equivocation in no-choice conditions leads to the attribution that the equivocator opposes the assigned position. The main conclusion suggested is that perceivers do take account of prior probabilities and situational constraints when attributing private attitude, but perhaps do not weight these factors as heavily as would be expected by a rational analysis.