Kinematic information feedback for learning a rapid arm movement

The experiments reported examine the notion that knowledge of results (KR) about the outcome of a response does not provide the necessary information for optimizing performance in many skilled activities. The effect of traditional KR was contrasted with various kinematic feedback parameters in the acquisition of a single degree of freedom response requiring the minimization of movement time. Experiment 1 showed that the presentation of discrete kinematic information feedback (peak accelaration, time to peak accelaration, and velocity at the target location) did not facilitate performance over movement-time KR. Experiment 2 revealed that presentation of a computer generated velocity-time representation of the movement as terminal information feedback improved performance over movement-time KR. This facilitation occured even without knowledge of the kinematics for optimal performance. The findings suggest that the task criterion specifies the appropriate information feedback for skill learning in that the information feedback must match the constraints imposed upon response output.     

Sex differences in symbol-digit substitution and speeded matching

Sex differences in digit-symbol substitution and speeded matching tests have not been adequately explained. Recent attempts have suggested the importance of the comparison processes, associative memory, and a possible difference in processing verbal and spatial information. Four experiments, two on speeded matching and two on symbol-digit substitution, supported the hypothesis that both tests involve comparison processes and that the sex difference in these processes depends upon the type of information. A female advantage is clearest with verbal material on both matching and symbol-digit substitution tasks. A male advantage was found on a symbol-digit substitution test only after training on the symbol-digit associations and when symbol discrimination involved spatial orientation. These results question previous interpretations of the clerical speed and symbol-digit substitution tests in terms of perceptual encoding speed, attentional shifts or sex differences in motor skills.     

Sex-role self-concept and persistence in a traditional vs nontraditional college major for women

This article reports a 3-year follow-up study of a sample of women engineering and home economics majors who were previously studied as freshmen. It was hypothesized that persistence in the two curricula would be related to sex roles, with feminine-typed women more likely to leave engineering and masculine-typed women more likely to leave home economics. The findings did not generally support this hypothesis, however. Women in the two majors who persisted were not found to differ significantly from women who changed majors or dropped out on either sex roles or on ratings given as freshmen of their satisfaction with and certainty of college major. Persisters in engineering had higher college entrance SAT math scores than changers or dropouts. Those who changed majors from home economics tended to go into less traditional fields than home economics. Nearly all of the women who changed from engineering chose another nontraditional or male-dominated field as their second major.     

Effects of defensiveness and self-actualization on a Herzberg replication

Two hundred workers were tested for self-actualization, internal vs external locus-of-control, repression vs sensitization, need for approval, and the tendency to attribute job satisfaction and dissatisfaction to motivators and hygienes. Results indicated that self-actualization is related to the attribution of satisfaction to both motivators and hygienes and that external locus of control, sensitization, and low need for approval are related to the attribution of dissatisfaction to both motivators and hygienes. Discussion includes a caution on the design of Herzberg replications and a suggestion that attribution of job feelings may be a function, in part, of personality variables affecting only a good or only a bad feeling.     

On putting apples into bottles — A problem of polysemy

An experiment was designed in such a manner that a sentence could be recalled given a certain cue only if the subject's encoding of the sentence included details and involved distinctions in the senses of words which could not have been part of the correct dictionary readings for these words. The most plausible interpretation of the results is that comprehension of a sentence entails constructing a particularized and elaborated mental representation, and that this process depends more heavily on knowledge of the world and analysis of context than is generally appreciated. It is claimed that existing associative or semantic network theories would be strained to accommodate the data.     

Internal external control of reinforcement as a determinant of study habits and academic attitudes

This study tested Rotter's hypothesis that internals would show more achievement-striving behaviors than externals using a direct measure of such behavior. Rotter's I-E scale and the Survey of Study Habits and Attitudes (SSHA) were administered to 123 male and 130 female undergraduate subjects. Significant sex differences were found on the SSHA scales but not on the I-E scale. Results indicated significant differences between internals and externals within each sex in terms of the average SSHA profiles and the individual SSHA scales. Using H. L. Mirels' (Journal of Consulting and Clinical Psychology, 1970, 34, 226–228) I-E subscales, similar results were obtained with the personal-control scale but not the political-control scale. Results provide additional evidence supporting the multidimensional interpretation of the I-E scale.     

Further test of a subjective probability model of social inference

Subjects read paragraphs suggesting that a fictitious person (O) either did or did not possess an attribute X. Then, they reported their beliefs that they would like O (P_L), that O possessed X (P_X), that O was intelligent (P_I) and that O was sarcastic (P_s). Other beliefs necessary to test the predictive accuracy of Wyer's subjective probability model of cognitive organization were also reported. The model accurately predicted P_L on the basis of beliefs about X (the attribute to which information about O directly pertained); this accuracy was greater than that obtained in an earlier study in which real persons were evaluated, and did not depend upon the favorableness of X. However, predictions of P_L based upon beliefs about O's intelligence overestimated obtained values, while predictions based upon beliefs about O's sarcasm underestimated these values; moreover, P_I and P_S were underestimated and overestimated, respectively, by beliefs about X. It was speculated that these discrepancies were due to temporary inconsistencies among beliefs resulting from the information presented which did not have time to be resolved before beliefs were reported. Changes in P_L, P_I, and P_S resulting from additional information about X were accurately predicted in all cases. Implications of the model for other formulations of social evaluation processes are noted.     

A community-reinforcement approach to alcoholism

Several theoretical approaches to alcoholism exist. An opérant reinforcement approach was used in the present study to develop a new procedure that rearranged community reinforcers such as the job, family and social relations of the alcoholic such that drinking produced a time-out from a high density of reinforcement. The results showed that the alcoholics who received this Community-Reinforcement counseling drank less, worked more, spent more time with their families and out of institutions than did a matched control group of alcoholics who did not receive these procedures. This new approach appears to be an effective method of reducing alcoholism. An analysis in reinforcement terms is presented of the etiology, epidemiology, and treatment of alcoholism.     

Interaction-priming: a method of reinstating patient-family relationships

The probability of successful discharge for long-term mental hospital patients has been found to depend on strong family and social relationships (Chapman, Day and Burstein, 1961 ; Chase and Silverman, 1943; Paul, 1969; Meichenbaum, 1966; Ullmann, 1967). Yet, long-term institutionalization often results in the weakening of these relationships. These findings suggest that successful discharge would be facilitated by procedures that maintained or restored these social relationships. The present study attempted to develop such a procedure, based on the principles of Response Priming (O'Brien, Azrin and Henson, 1969) and Reinforcer Sampling (Ayllon and Azrin, 1968). Response Priming views complex behavior such as family visits as chains of responses and states that the probability of the completion of the chain (visit) increases during later portions of the chain. The present procedure applies this principle by not requiring visitors to engage in those behaviors remote from the completion of the chain, but rather, by making visits available to them at the terminal portion of the chain. This was done by not requiring visitors to come to the hospital to visit the patient, but rather, by directly transporting the patient to the visitor's home. The Reinforcer Sampling rationale (Ayllon and Azrin, 1968) suggests that future visits would likely increase if visits were reinforcing to the family and the patient. Thus, the patients' behavior was analyzed during visits in the families' homes. Between visits, instruction was given to the patients for improving the reinforcing quality of these types of behavior for subsequent visits. The rationale was that the Response Priming Procedure would produce visits and the Reinforcer Sampling Procedure would show the families and patients that being together was enjoyable. The relationships should, therefore, be maintained and, hopefully, thereby increase the likelihood of successful discharge for the long-term hospitalized patients.