Holland's theory: Stability of avocational interests

The generality and stability of Holland's vocational choice model was tested by examining preference for avocational (leisure) activity. Based on their responses to the Strong Vocational Interest Blank, college students were placed into one of the six Holland groups. They also indicated preferred leisure activities on questionnaires that were administered at a 9-year interval. Six hypotheses were developed relating Holland groups to particular types of avocational behavior. For example, it was predicted that the Artistic group would be more active in cultural affairs and that the Enterprising group would prefer reading political and economic magazines. The initial test of these hypotheses during late adolescence confirmed five of the six predictions. A follow-up 9 years later confirmed all six hypotheses. These results provide some support for the notion that individuals self-select a variety of situations. Also, the relationships between Holland scales and leisure activity and possible implications for the vocational choice model are discussed.     

The validity of the Holland and Basic Interest scales of the Strong Vocational Interest Blank: Leisure activities versus occupational membership as criteria

This study compared leisure activities with occupational membership as criteria for determining the concurrent validity of the Holland and Basic Interest scales of the Strong Vocational Interest Blank (Form T399). Subjects were 89 thirty-six-year-old males representing a variety of occupations. R. H. Dolliver's (Journal of Counseling Psychology, 1975, 22, 199–203) two methods for assessing validity were used: highest single scores on relevant scales and scores above established cutoff points on relevant scales. Results indicated greater congruence between interest scales and occupations than interest scales and leisure activities, except when Basic Interest scale cutoff scores were used. After chance factors were taken into account, Holland scales were found to be more accurate than Basic Interest scales in identifying occupations and in identifying leisure activities when highest scale scores were used. Using cutoff scores, Basic Interest scales were more accurate than Holland scales in identifying leisure activities. Supplementary analyses indicated that the validity of the Holland and Basic Interest scales increases when they are presumed to reflect either current occupation or preferred leisure activity. Results of this study were compared with Dolliver's (1975) findings.     

Factor structure of the Vocational interest models of Roe and Holland

Analyses of interscale relations in 235 college students for the Vocational Preference Inventory and Vocational Interest Inventory, based on interest models of Holland and Roe, respectively, suggest that the twodimensional, circular configuration of occupational or personality types may be an oversimplification which impedes the understanding of the structure of vocational interests. For both interest models four orthogonal dimensions seem necessary to capture interindividual variability: Social vs. Technical, Organizational vs. Outdoor, Science vs. Business, and Artistic.     

The applicability of Holland's typology to clients

Holland, 1966, Holland, 1973 has generated a vast amount of research seeking to validate or to challenge the hexagonal model and the associated constructs of consistency and differentiation. A review of the studies related to Holland's typology, however, reveals a very small number of studies with clients as subjects. The present study was an evaluation of Holland's model using the General Occupational Themes of the Strong-Campbell Interest Inventory (SCII) (D. P. Campbell & J. C. Hansen, Manual for the SVIB-SCII, 3rd ed., Stanford, Calif.: Stanford Univ. Press, 1981) obtained from college students who had sought vocational counseling. The use of the hexagonal model as a framework for the interpretation of relationships among the SCII General Occupational Themes was supported, and the SCII was found to be a valid instrument for vocational counseling in a client population.     

Empirical derivation of SVIB-Holland scales and conversion tables

Significant relationships between the Holland Vocational Preference Inventory (VPI) and the Strong Vocational Interest Blank (SVIB) were again empirically demonstrated in this study, and conversion equations were developed to use standard scores of SVIB scales, rather than items, to produce estimates of VPI scores. Cross validation on a limited population yielded supportive evidence that these conversion equations can provide meaningful VPI estimates from SVIB scale scores. The need for validation across a variety of populations was underscored in order to assess further generalizability of these findings.     

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.     

运用职业自我选择测验(SDS)研制大学专业搜寻表的初步研究

为了给高考考生选择专业或在读的大学生选择辅修专业提供理论与实践的指导,该研究以ＳＤＳ作为测验工具,选取武汉市８所大学２２个专业１２２７名大学生作为研究样本,经施测后的数据统计分析表明：ＳＤＳ在大学生中基本适用。通过聚类分析、访谈发现,以标准分代替粗分的记分方法来产生的专业码具有较高的效度。按照这种方法将可研制出与ＳＤＳ配套使用的专业搜寻表。研究的结果还表明,专业搜寻表与Ｈｏｌｌａｎｄ职业搜寻表有中等一致性,是否直接按国外职业搜寻表来编制适合我国的专业搜寻表尚有待进一步研究来确定。     

Dichotic listening ear asymmetry: Patterns of longitudinal development

Dichotic listening research with children has continued to be prevalent although numerous authors have described both theoretical and methodological limitations with traditional dichotic listening free-recall paradigms. The present research adds to this growing skepticism by reanalyzing two major longitudinal studies of children's ear asymmetries. These two studies, based in different countries (United States, Holland), utilized highly similar paradigms (free-recall digits), subjects (males), and age levels (kindergarten and second and fifth grade). The questions of ear advantage development, patterns of ear advantages, and the relationship between dichotic listening performance and reading skills are addressed from the multiple statistical methodologies represented in the literature. From these analyses, support for all of the major hypotheses regarding the developmental patterns of dichotic listening performances could be obtained from the same data samples. The use of traditional free-recall dichotic listening paradigms are not recommended for use with children. The implications for future research are discussed.     

Environments as reinforcer systems in the study of job satisfaction

This paper examined differences in the degree to which fifteen specific sources of job satisfaction were related to and predictive of the overall satisfaction of department chairmen in the six model environments proposed by Holland (1973). The fifteen specific sources of job satisfaction were regressed on overall satisfaction, separately for chairmen in each environment, through the use of incremental stepwise multiple regression procedures. The results indicated that the overall satisfaction of chairmen in these six environments was differentially related to unique weightings and combinations of the fifteen predictor variables. It was concluded that environments, composed of essentially similar groups of people in different organizations, serve as job satisfaction reinforcer systems in a manner similar to organizations as illustrated by Dawis.     

Personality types and traits in the Vocational Preference Inventory

The relationships between the six scales on which Holland's (1973) theory is based (viz., Realistic, Investigative, Social, Conventional, Enterprising, Artistic) and the five other scales (viz., Self-control, Masculinity, Status, Infrequency, Acquiescence) of the Vocational Preference Inventory (VPI) (Holland, 1970) were investigated using canonical analysis. Considering the six personality type scales as one set of variables and the five trait scales of the VPI as the second set of variables, five significant canonical correlations were obtained for a sample of 373 mostly white undergraduate students. In a second study, three significant canonical correlations were found for a sample of 115 black college students at another school. The weights of the VPI scales suggested that three patterns of relationships among the scales are shared by the black sample and the mostly white sample.     

Congruence,personality pattern,and satisfaction in college women

One hundred and twenty-nine female undergraduates took the Barron's Ego Strength Scale, the Levenson Locus of Control Scale, and the Holland VPI. Congruence scores were calculated using three-letter codes from the VPI and expressed major choice. Multivariate analysis of variance revealed that congruent subjects were significantly more consistent and reported higher levels of certainty and perceived congruence. No satisfaction differences were found. Results are discussed with respect to Holland's theory and previous research on the correlates of congruent person-environment interactions.     

Eleven-year career stability and change as reflected in Project Talent data through the Flanagan,Holland, and Roe occupational classification systems

The vocational psychologist seeks classifications of occupations which maximize career stability as occupations change from time to time in the life. This study investigates the extent of career stability and the patterns of career change which have occurred in the lives of Project TALENT twelfth grade students in the 11 yr elapsing since they were tested. “Career” plans in the last year of high school and at 1, 5, and 11 yr after testing were classified by the Flanagan, Holland, and Roe occupational classification systems in order to study the career stability and patterning within each system and to contrast both among systems. Career stability proved to be about the same in all three classification systems but decreased in all cases as the interval over which it was measured increased. Career stability increased as subjects grew older, proving to be the greatest from 5 to 11 yr after high school. Patterns of change mildly conformed to the circular patterns claimed by Holland and Roe for their systems and the linear pattern hypothesized for the Flanagan system. Generally, the direction of “career” flow was away from intellectual careers to careers in business and sales but each system had unique results as well.     

quantifying the level of congruence between two career measures: an exploratory study

This study investigated the level of congruency between scores on the Self‐Directed Search–Form R (J. L. Holland, 1994) and scores from an online instrument, both of which measure Holland types (J. L. Holland, 1985, 1997). A reasonably high level of congruence was found. Implications for career counselors are briefly delineated.     

Unrealistic vocational choice: A research model

Multimethod factor scores were derived from measures of ACT aptitude, ACT nonacademic achievement and the Omnibus Personality Inventory. A sample of 89 subjects whose freshman major was engineering and whose junior year major consisted of a variety of nonengineering subjects represented subjects who had made an unrealistic vocational choice as freshmen. The junior year majors of these subjects were classified by Holland's theory of vocational choice and the relationship between the factor scores and Holland categories was shown by the technique of spatial configuration. These data were employed to illustrate how counseling practice could be integrated with vocational theory.     

Consistent curricular choice and congruence of subsequent changes

Curriculum choices of 324 male and 157 female liberal arts students who took the Strong-Campbell Interest Inventory (SCII) during freshman orientation were classified as congruent or incongruent on the basis of rated correspondence between three-letter codes derived from (SCII) Holland theme scales and expressed curricular choice. The choices of those subjects reporting one or more changes in five semesters were examined for level of congruence using a two-way analysis of variance with repeated measures. While serious methodological limitations are noted, analysis of variance procedures indicated that congruent subjects tended to be more stable, more differentiated, and more academically oriented than incongruent subjects. Among subjects who reported one or more changes, Artistic subjects decreased in congruence while Investigative subjects showed no overall change. Results are discussed in terms of recent theory and previous research.     

Personality differentiation and prediction of persistence in physical science and engineering

Discriminant analyses techniques were applied to freshmen California Psychological Inventory (CPI) and Holland Vocational Interest Inventory (VPI) data for 914 male students and were used to predict curricular membership after two years of university education. The results suggest that those who persist in physical science, engineering or other curriculum are significantly discriminable from one another on the basis of freshman personality data, and that these personality variables show reasonable predictive stability when applied to a cross validation sample. Physical scientists appear to be markedly differentiated from engineers or others along an introspection-intellectual versus social conventional dimension. The predictive power of CPI and VPI personality variables while statistically exceeding chance is considerably less than that previously reported for ability or interest measures.