The effects of shock intensity on fear incubation (enhancement): A preliminary investigation of Eysenck's theory

Rats were presented with three levels of shock intensity during acquisition followed by three levels of nonreinforced CS exposure during extinction (3 × 3) in the context of a one-way avoidance situation. Extinction effects were directly dependent upon the differential shock-intensity levels which were delivered during acquisition. Avoidance behavior was sustained and, in fact, increased (incubation) for high-shock groups despite increased duration of nonreinforced CS exposure. These results were interpreted as support for Eysenck's (1968) theory of fear incubation.     

Study habits and Eysenck's theory of extraversion-introversion

Predictions derived from Eysenck's theory of personality were tested in two samples by relating extraversion scores to library study locations, frequency of study breaks, and self-report of factors which influence study location. The predicted main effects for study location were found, with extraverts occupying locations that provided greater external stimulation. Positive correlations were consistently found between extraversion and preferred level of noise, preferred level of socializing opportunities, and rated importance of socializing opportunities. The prediction that extraverts would take more frequent study breaks was supported in Sample 1 but not replicated in Sample 2. The data are interpreted as providing direct support for Eysenck's theory of behavioral differences and mixed indirect support for his theory of neurological differences between introverts and extraverts.     

Drug tolerance and personality: Some implications for Eysenck's theory

Two previous studies, one of nitrous oxide and the other of amylobarbitone sodium, had shown that tolerance of these drugs, assessed by the ‘sedation threshold’ procedure, was influenced by an interaction between introversion-extraversion and neuroticism: tolerance was negatively correlated with E in High N subjects and positively with E in low N subjects. In a study described in the first part of this paper the same result was found for thiopentone among a group of 50 surgical patients, tested as part of their routine pre-operative procedure. The remainder of the paper is devoted to a more detailed analysis of this interactive effect, undertaken by combining the personality and sedation threshold scores from three studies. In this larger sample the previously observed results were broadly maintained, in that neurotic extraverts and normal introverts proved to have very low drug tolerance; the highest tolerance was found, however, in introverts with moderate, rather than very high, neuroticism. Comparison with similar data for a large group of neurotic patients revealed a somewhat different picture: the sedation thresholds of patients were sometimes predictable from their personality scores and sometimes from their diagnoses, the two not always coinciding. The results as a whole are discussed with reference to the possible neurophysiological mechanisms mediating depressant drug action and personality differences. Specifically it is suggested that some parts of the observed variation in drug tolerance might be explained by combining certain features of the modifications to Eysenck's theory of extraversion and neuroticism proposed, respectively, by Gray and by Claridge. However, it is considered that not all of the variation can be explained in this way and that other personality characteristics, probably those associated with ‘psychoticism’, are likely to prove important determinants of drug tolerance differences.     

Male alcoholics,secondary psychopathy and Eysenck's theory of personality

The scores of several samples of male alcoholics and others on the MAC Scale (an MMPI-derived scale for the differentiation of male alcohol abusers from non-substance-abusing male psychiatric outpatients) are summarized, and the responses of the false negatives and false positives from the scale's standardization samples are analyzed. The following 7conclusions were reached: (1) There are two broad classes of male alcoholics—those who fall into the E + N + quadrant of secondary psychopathy and those who fall into the E - N + quadrant of neurotic introversion; (2) Unselected runs of male alcoholics populate these two quadrants in a quite stable ratio of 17 to 3, respectively; (3) Pari passu, Eysenck's placement of alcoholics in the E + N + quadrant will be upheld in approximately 85% of the cases while those who hold that alcoholics are ‘dysthymics who also drink too much’ will find themselves in error in approximately similar degree.     

Assertiveness,aggressiveness and Eysenck's personality variables

The relationship of scores on the Interpersonal Behavior Survey (IBS) and the Eysenck Personality Questionnaire (EPQ) were studied to investigate the relationship of assertiveness and aggressiveness to more basic dimensions of personality. This relationship was studied in two samples. Sample one consisted of 12 psychiatric inpatients, 67 college students and 69 state prison inmates. Sample two was made up of 50 psychiatric inpatients. The correlational results were highly similar in both samples. Significant negative correlations were found between the EPQ Neuroticism scale and IBS assertiveness scales; significant positive correlations were found between the EPQ Neuroticism and Psychoticism scales and the IBS aggressiveness scales, and significant positive correlations were obtained between the EPQ Extraversion scale and the IBS assertiveness scale. An ANOVA revealed a significant Neuroticism by Extraversion interaction on the IBS General Assertiveness, Rational scale. Neurotic introverts were found to have especially large deficits in assertive behavior. The results are generally consistent with Eysenck's theory of personality.     

The relationship between Eysenck's major personality dimensions and simultaneous and sequential processing in children

The present study reexamined Eysenck's hypothesis that intelligence and personality are uncorrelated. Intelligence was measured with the Kaufman Assessment Battery for Children, yielding scores for simultaneous and sequential processing and achievement, and the Woodcock-Johnson Brief Scale. Personality was assessed with the Junior Eysenck Personality Questionnaire. Ss were 105 children, ages 8$\text{1}\text{2}$10$\text{1}\text{2}$yr. Although a process as well as a product-oriented intelligence test was employed, the correlational and discriminant analyses supported Eysenck's original hypothesis.     

College major and career choice: A retest of Holland's theory

In an effort to examine whether the previously established relationship between vocational choice and self-ratings on Holland's personality stereotypes among college freshmen would be strengthened with a sample of male college seniors, 109 subjects, sampled on the basis of major field choice, completed a questionnaire to select career stereotypes which described them best. The relationship between self-ratings and academic major was also to be examined. Significant relationships were obtained for four stereotypes (realistic, conventional, enterprising, and artistic) on the basis of both major and vocational choice, although significant stereotypes were not identical in each. Three of these significant relationships based on vocational choice matched those obtained previously. An additional finding suggested that vocational choice was slightly more valid than major field as a basis for utilizing this technique. The more restricted class sample emphasized did not, however, produce a more substantial relationship between self-ratings and occupational choice as expected.     

Concurrent validity and Holland's theory

This study was designed to explore two areas: (1) the concurrent validity of Holland's theory for employed men using four different operational definitions of vocational orientation, and (2) the relationships among all possible combinations of same named scales across the four inventories. Concurrent validity was studied by administering the Vocational Preference Inventory, the Self Directed Search, and the Holland Scales (Set I and Set II) to 153 male workers established in occupational environments consistent with Holland's six vocational environments. The results revealed that five scales of the VPI and of the Holland Scales (Set I and Set II) and four scales of the SDS successfully differentiated the occupational groups consistent with Holland's theoretical framework. The correlation coefficients for same named scales for all possible combinations of the four inventories were all found to be significant. In general, the findings of this study tend to support the concurrent validity of Holland's theory for employed men.     

Limit properties of Luce's choice theory

Luce's Axiom is interpreted in terms of a sequence of measures on the unit interval, and their limit properties are discussed. In particular, all limit laws are found to be either absolutely continuous with density x^α for α ∈ (?1, ∞) or else degenerate laws consisting of a point mass at 0 or 1. A close connection between Luce's choice theory and Karamata's theory of regularly varying functions is established and systematically used.     

A test of Holland's theory in a population of accountants

The study examined the SDS scales and work attitudes of 1952 Canadian Chartered Accountants (Anglophones and Francophones) and Californian Certified Public Accountants. Combinations of C, E, and S were found the most frequent personality patterns, and they constitute 27.8% of the total population. Scores on these types were positively related to organizational and professional commitments, as well as to vocational satisfaction. The level of congruence was positively correlated with the vocational criteria only in the American sample. The consistency level correlated with professional commitment in the Francophone sample, whereas the differentiation score showed mixed results.     

Extending Holland's theory to the later years

Sixty-five men and women, aged 50 to 88 years, completed Holland's Vocational Preference Inventory (VPI) and a work history questionnaire. Each participant was assigned one-letter Holland personality type codes for his or her first full-time job, longest full-time job, last job (if retired) or present job (if employed), and hobbies. In general, VPI scale scores and high point codes were consistent with the occupational codes but less consistent with the hobby code. The usefulness of Holland's vocational theory to the aged population is discussed.     

Two tests of Maslow's theory of need fulfillment

In a two-part test of Maslow's theory of human motivation, two relationships were explored: (1) the relationship between need importance and need deficiencies, and (2) the relationship between need deficiencies and life satisfaction. The subjects were groups of women college graduates in three types of occupations: professional-managerial, clerical-sales, and homemaking. In the first study, group differences in actual deficiencies did not support the hypothesis that need importance is negatively correlated with need deficiencies. Rankings of the deficiencies for the three groups, however, were consistent with the hypothesized relationship, as were the small but significant correlations that were obtained between need importance and deficiency values. In the second study, the findings gave partial support to Maslow's theory in that a significant relationship was found between need fulfillment and life satisfaction for two of the three occupational groups. The findings of both studies are discussed in relation to considerations in women's career development.     

Positive evidence for Eysenck’s arousal hypothesis: A combined EEG and MRI study with multiple measurement occasions

Eysenck’s arousal hypothesis suggests that introverts have greater cortical activity than extraverts. This prediction was tested in several studies that used the electroencephalogram (EEG) alpha activity to index cortical arousal, but empirical findings are inconsistent. Possibly, external factors of the measurement situation or static factors such as skull thickness may act as nuisance variables on alpha activity and thus mitigate the relation between arousal and extraversion. The aim of the present study was to test the arousal hypothesis with a focus on these methodological issues. Resting EEG was acquired on several occasions of measurement, skull thickness was quantified with anatomical magnetic resonance imaging (MRI), and extraversion was assessed by questionnaire. There was a positive association between alpha activity and extraversion, which was neither affected by external factors nor by skull thickness. This finding is in line with the arousal hypothesis and suggests that external or static factors do not contribute to the inconsistency of empirical findings.     

Talavage's P-model: A translation of Rotter's social learning theory of behavior and its application to a conceptualization of interpersonal distance behavior

The existence of two different approaches to the theoretical understanding of social behavior is noted. The author presents a systems model as offered by Talavage and compares it with Rotter's social learning theory. The efficacy of the systems translation of Rotter's theory for the understanding of simple behavioral responses is discussed and a sample methodology incorporating systems theoretical implications is proposed.     

Holland's theory and non-college-degreed working men and women

The main concern of this study was to investigate differences between men and women employed in traditional male occupations using the Vocational Preference Inventory (VPI) and the Self-Directed Search (SDS). The VPI and the SDS were administered to 103 male and female non-college-degreed workers in three occupations (bus-taxi drivers, police officers, and car sales agents) corresponding to three of Holland's environmental categories (Realistic, Social, and Enterprising). In general, the results indicate that the VPI and SDS scales to some extent discriminate among occupational groups, but expected patterns do not always occur within and between occupational groups.     

Person-environment congruence and employee job satisfaction: a test of Holland's theory

Person-environment congruence as assessed by Holland's model of vocational preference was tested in a sample of 362 employees from five environmental typologies (Realistic, Investigative, Social, Enterprising, and Conventional). Employees were classified as having congruent or incongruent person/environment pairings according to their occupation and their responses to Holland's Self-Directed Search. It was hypothesized that congruent employees would be significantly more satisfied with their jobs than incongruent employees. The results indicated that congruent employees were significantly more satisfied with the job facet satisfaction measures of work, pay, promotions, supervision, and coworkers as well as overall satisfaction compared to incongruent employees. In addition, the results revealed several Environment × Congruence interactions, indicating that the effects of person-environment congruence vary across different environmental typologies. The results are discussed in the context of establishing a fit between individual attributes and organizational environments.     

Types produce types: An examination of personality development using Holland's theory

This study was designed to test Holland's hypothesis that parents encourage the development of their own personality types in their offspring. Data were collected by personal interviews from three freshmen classes at a large midwestern university. Parent's personality types (occupations) were compared to offsprings' personality types (expressed occupational choices) using the Kolmogorov-Smirnov one-sample test to determine whether or not the comparisons were due to chance. The results indicated that relationships existed between the personality types of fathers-sons, fathers-daughters and mothers-daughters while no relationship was confirmed between mothers-sons.