Abstract
This chapter provides an introduction to person-centred research approaches in vocational psychology with a specific focus on modern latent variable mixture approaches to examining unobserved population heterogeneity. First, we provide a general overview of the concept of unobserved population heterogeneity as a crucial assumption that underlies person-centred analytic approaches and discuss the way in which latent variable mixture models overcome the limitations of traditional person-centred analytic techniques. We then discuss the utility of person-centred strategies in vocational psychology research via the consideration of empirical applications of mixture analyses. Next, we provide an introduction to one of the more widely-used person-centred approaches—Latent Profile Analysis (LPA)—in vocational psychology, drawing comparisons of these approaches with more traditional person-centred analytic techniques as well as the common factor model. We demonstrate the LPA procedure using data on the RIASEC vocational interests, and briefly consider implications of the LPA model for practice. It is our hope that this non-technical introduction to person-centred approaches will foster further interest in applying these methods to test crucial assumptions of homogeneity and heterogeneity in sample data typically used in vocational psychology research and practice.
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Notes
- 1.
The term “person-centred” does not refer to the humanistic school of person-centred counselling (e.g., Rogers 1957).
- 2.
Investigative Interest Item 8 (“Make a map of the bottom of the ocean”) was specified to cross-load onto Realistic interests. Social Interest Item 4 (“Teach an individual an exercise routine”) and Enterprising Interest Item 4 (Operate a beauty salon or barber shop”) were specified to cross-load onto Artistic interest. Finally, Enterprising Interest Item 5 (“Manage a department within a large company”) was specified to load onto Conventional interests. See Perera and McIlveen (2018) for a detailed rationale for the specification of these cross-loadings.
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Perera, H.N., Barber, D., McIlveen, P. (2019). Person-Centred Research in Vocational Psychology: An Overview and Illustration. In: Athanasou, J.A., Perera, H.N. (eds) International Handbook of Career Guidance. Springer, Cham. https://doi.org/10.1007/978-3-030-25153-6_36
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