Holland's personality constructs as predictors of stability of choice

It was the purpose of this study to test Holland's assertion that stability of vocational choice can be predicted from: (a) congruence of personality with chosen career, (b) differentiation of personality, and (c) internal consistency of personality characteristics. The relationship of each of the three constructs to stability of choice of college major was studied among 167 university students. It was hypothesized that prediction could be improved by combining congruence, differentiation, and consistency in a multiple relationship. The relative importance of the three constructs was examined. Findings supported Holland's contention that congruence and consistency are positively related to stability. No significant relationship was found between differentiation and stability. When combined, all three constructs predict stability, but the efficiency of prediction is not improved by adding differentiation and/or consistency to congruence. As hypothesized, congruence was found to be the most important predictor, followed in importance by differentiation and consistency, respectively.     

Strong Vocational Interest Blank basic interest clusters and occupational satisfaction

A Q-factor analytic technique applied to the Strong Vocational Interest Blank (SVIB) basic interest scales of 156 males yielded three bipolar factors described as conceptual (applied vs theoretical thinking); interpersonal (people vs things); and volitional (autonomy vs structure). From these results the investigators constructed a model for categorizing occupations into corresponding vocational areas: managerial vs academic, social vs physical sciences, and professional vs technical. Each individual's primary interest area and occupational status relative to the six corresponding areas was then determined. The degree of fit between interests and job categorization related significantly to ratings of job satisfaction (p < .001). Those findings are complementary to Holland's notion that interests are expressions of psychological needs and to Lofquist and Dawis' perception of interests and jobs as needs and need reinforcers.     

Evaluation of ego strength based on certain Rorschach variables.

Despite the importance of the assessment of ego strength for appropriate assignment of clients for psychotherapy and/or rehabilitation, existing techniques have not fulfilled expectations. A method for assessing ego strength through the Rorschach Test independent of clinical criterion is proposed. In addition to certain variables of Klopfer's RPRS (M+, FM+, FC+ plus CF+), sharply preceived space responses are included. They constitute a highly intercorrelated global measure of ego strength and are also highly correlated to a relatively independent Rorschach variable of global ego efficiency, i.e. integrated whole responses. In accordance with prediction, non-controlled color responses as well as accuracy of form perception did not correlate in a non-clinical sample with either measure of ego strength.     

Signal frequency and shock probability as determinants of prolonged vigilance performance in rhesus monkeys

The effects of changing signal frequency on a prolonged vigilance task were investigated by systematically increasing the average inter-trial interval between successive signals. During a 6-hr watch, vigilance performance remained constant when the rate of signal presentation was 40, 20, and 10 per hour. When the rate of signal presentation was reduced to 7 or 4 per hour, marked decrements in detection performance were observed. Similar vigilance decrements occurred when the average rate of signals per hour was kept constant (10 per hour) and the probability of receiving a shock for missing a signal was systematically varied. The results of this study indicate the importance of reinforcement factors in the control and maintenance of vigilance performance.     

On the development of national attitudes in children

The present study consists of three related experiments which are concerned with the development of national attitudes in children between the ages of seven and twelve. It was predicted on the basis of a structural interpretation of Allport's three-stage developmental theory of prejudice that national attitudes will increase at first due to increasing consistency of judgment and decrease afterwards due to cognitive differentiation. The hypothesis is partially confirmed with respect to the attitudes of children towards other countries but not confirmed with respect to the attitudes of children towards people who are perceived as foreigners. A tentative explanation is offered for the last finding. It was shown moreover that the attitudes of older children display more cognitive balance than those of younger children. In connection with the last problem, a quantified modification Bf Heider's theory of balanced states was introduced.     

Potassium chloride preference in normal,sodium—and sodium—potassium—deficient rats

KCl water preference was examined in diet-replete, sodium-and sodium—potassium-deficient postpubertal rats of different ages. While diet-replete rats displayed a KCl preference-aversion profile similar to that found using other salts, when retested 30 days later, these same animals had no KCl preference. Na-and Na—K-deficient rats preferred KCl over a broad range of concentrations when tested in early postpuberty and the Na—K-deficient group had a markedly reduced KCl preference threshold (0.12%) when compared to all other groups in the study. But Na-and Na—K-deficient rats older by 2 1/2 months did not prefer KCl. The notion of specific food hungers can be invoked to account for some of the preferences. But hedonics, age and KCl experience must also be considered based on (1) the quantities of KCl consumed, (2) the preference reversals within animals, as well as (3) the significantly increased heart—and kidney—body weight ratios in the rats with the greatest KCl preference.     

Psychophysical scales of apparent heaviness and the size-weight illusion

The apparent heaviness of a set of 40 cylindrical objects was scaled by the method of magnitude estimation. The objects varied in weight, volume. and density. There were three main conclusions: (1) For any constant volume, heaviness grows as a power function of weight; the larger the volume. the larger the exponent of the power function. The family of such power functions converge at a common point in the vicinity of the heaviest weight that can be lifted. (2) For any constant density (i:e., weight proportional to volume), heaviness does not grow as a power function of weight. (3) For any constant weight, heaviness decreases approximately as a logarithmic function of volume; the constants of the log function depend systematically on the weight of the object. The outcome furnishes a broad quantitative picture of apparent heaviness and of the size-weight illusion (Charpentier’s illusion).     

Estimating the reliability of interview data

A model for a score based on an interview is presented which identifies the effect due to the subject, to the manner in which the interviewer tends to conduct his interviews, to the criteria he tends to use in scoring subjects' responses, to the compromises he tends to adopt between the demands of interviewing and those of scoring, and to chance errors. A suggested experimental design calls for each ofK investigators to interview a different sample ofN subjects, but for all investigators to score each subject. The drawing of inferences when interest is only in theK participants in the reliability study is considered, and a numerical example is given.This work was supported in part by grant DE R01 00793 from the National Institute of Dental Research, and in part by grants MH 08534 and MH 09191 from the National Institute of Mental Health, and forms part of the author's Ph.D. dissertation at Columbia University. The guidance provided by Professor T. W. Anderson is gratefully acknowledged.