The measures of decision-making behaviors were obtained from four decision situations developed by the experimenter. Closedmindedness was assessed using Rokeach's (1960) Dogmatism (D) scale.Persons with high D-scores tended to arrive at decisions on the basis of less information than persons with low D-scores (r = -.22, p < .05) and to make more appropriate use of information (r = +. 40, p < • 01) , yet they showed no tendency to differ in either accuracy (r = +.06, p > .05) or confidence (r = -.18, p> .05). Furthermore, they showed no tendency to be less able to reverse an earlier decision (r = +.04, p>. .05). of a decision but also in decision-making behaviors. Variations in --decision-making behaviors are attributab+e, at least in part, to the individual's emotional make-up and the relationship of the emotional make-up to the individual's cognitive structure. Frenkel-Brunswick (1949) is prominent among the many who have pointed to this relationship between personality and cognitive variables. She found that variations in parental behavior result in yariations in the child's ability to tolerate ambiguity. According to Vacchiano et al. (1969), later studies have supported this view.One personality dimension that has been linked widely with cognitive functioning is dogmatism, or closedmindedness. Rokeach (1954) defines closedmindedness "(a) a relatively closed cognitive organisation of beliefs and disbeliefs about reality, (b) organized around a central set of beliefs about absolute authority which in turn, (c) provides a framework for patterns of intolerance toward others" (p. 195). Rokeach's measure of closedmindedness is dogmatism (D-scale). Allport (1947) observed, many years ago, that whether or not facts are ignored or falsified is the result of both intellectual and emotional forces existing in the individual. Ignoring or falsifying facts on the basis of value structures present in the individual has the potential effect of warding 2 off threats from reality (Allport, 1947). At the same time, according to Maslow (1954), it gives the individual the feeling of understanding reality. Thus, closedmindedness has come to be seen as a cognitive defense mechanism. One would expect· it to discriminate individual decision-making behaviors.This study focuses on two pre-decisional and two post-decisional aspects of decision-making behavior. The pre-decisional behaviors meas- Table ·1 for a sunrrnary comparison of selected findings.).Pruitt (1961) specifically focused on how many pieces of information were requested by an individual prior to making a decision. His subjects were asked to decide whether a red or a green light was more likely to flash. Information consisted of a sequence of flashes of these lights.Under one condition, a subject could make this decision only once per sequence, whereas under another condition, prior to seeing any lights, an initial decisio~ had to be made, but this decision could later be changed once. Using the expected-value model of decision-making, Pruitt calculated the expecte...