Epistemology and the theory of problem solving

Problem solving has recently become a central topic both in the philosophy of science and in cognitive science. This paper integrates approaches to problem solving from these two disciplines and discusses the epistemological consequences of such an integration. The paper first analyzes problem solving as getting a true answer to a question. It then explores some stages of cognitive activity relevant to question answering that have been delineated by historians and philosophers of science and by cognitive psychologists and artificial intelligencers. The traditional opposition between discovery and justification is challenged. It is suggested that epistemology may be conceptualized, in part, as the critical assessment of problem-solving strategies.     

Alcoholic drinking: suppression by a brief time-out procedure

Volunteer chronic alcoholics were given daily access to substantial quantities of alcohol within a residential research setting. Drinking was suppressed to an average of approximately one-half of Baseline levels when 10 or 15 min of physical and social isolation was required as an immediate consequence to receiving each one-ounce drink of 95-proof ethanol. This time-out procedure suppressed the drinking of nine out of ten subjects. Drinking returned to high levels when brief contingent time-out was discontinued. The relevance of such reversible controlling relationships to the treatment of alcoholism is discussed.     

Perceived trait-co-occurrences according to managerial role: A structural representation

Fifty-eight middle managers were presented with three check lists containing effective and ineffective managerial traits previously obtained as free responses from another sample of middle managers. Each manager in the present study was asked to describe a superior, a peer, and a subordinate. Multidimensional scaling solutions were then calculated from these check list data. Ratings, obtained on five properties, were used to interpret the solutions.The findings demonstrated that managers in a highly competitive organization having frequent, formalized evaluative procedures (1) ascribe highly negative attributes to those peers perceived as effective, (2) have relatively undifferentiated views of their ineffective peers and ineffective subordinates, but (3) not their superiors who are viewed critically whether effective or ineffective.     

Passive and participant modelling in exposure treatment of obsessive-compulsive neurotics

The effects of passive modelling and participant modelling in exposure treatment were compared in an experimental study on 10 severe obsessive-compulsive neurotics. These effects were assessed in several ways; by self and independent ratings, attitude scales, a psychometric test and a behavioural avoidance test. On most measures, the modelling treatments were more effective than the placebo relaxation treatment and the participant form was superior to the passive form on most indices. The overall therapeutic results were consistent with those obtained in earlier studies in this series.     

Effects of hippocampal stimulation on acquisition, extinction and generalization of conditioned suppression in the rat.

Rats implanted with electrodes in the dorsal or ventral hippocampus received posttrial stimulation in training sessions with footshock reinforcement. Afterdischarges without overt seizures were consistently without effect on the rate of acquisition of suppression of licking during an auditory conditioned stimulus (CS), although conditioning was retarded by the delivery of distracting stimuli following footshock. The rate of conditioning remained insensitive to elicitation of dorsal hippocampal afterdischarges (DHAD) despite subsequent alterations of session length, intertrial interval and preexposure to the CS. However, faster extinction of suppression occurred following DHAD, suggesting a limited but essential role of the hippocampus in addressing stored information.     

Personality research: components of variance attributable to the person and the situation.

Studies involving personality and situational variables were surveyed. Studies permitting determination of main effects and interactions involving these variables have increased since 1950. In one comparison, situational main effects were significant in 65.5% of the cases, whereas the figure was 31% for individual difference variables and 59.9% for interactions. In another comparison, 35% of situational main effects accounted for more than 10% of the variance, compared with 29% for personality indexes; 19% of the situational variable effects accounted for more than 20% of the variance, compared with 14% of the personality main effects. Low percentages of variance were accounted for by all variables investigated: situational, personality, demographic, and interactions among these variables.