Identifying Basic Classes of Sexual Orientation with Latent Profile Analysis: Developing the Multivariate Sexual...

Area of Science:

• Psychology
• Sociology
• Human Sexuality

Background:

• Research on sexual minorities is challenged by inconsistent definitions of sexual orientation groups.
• Integrating the dimensions of sexual identity, behavior, and attraction is complex, especially when identity and behavior diverge.

Purpose of the Study:

• To use a data-driven approach to identify a concise set of sexual orientation classes.
• To develop a reliable system for classifying sexual orientation based on multiple dimensions.

Main Methods:

• Latent profile analysis (LPA) was employed on a large, diverse sample (N=3182).
• Predictor variables included sexual identity, behavior, and attraction.
• The Multivariate Sexual Orientation Classification System was developed to replicate LPA findings.

Main Results:

• Four fundamental sexual orientation classes were identified: heterosexual, homosexual, bisexual, and heteroflexible.
• Heterosexual and homosexual individuals reported higher psychological functioning than bisexual and heteroflexible individuals.
• Bisexual and heteroflexible individuals exhibited higher risk behaviors and lower psychological functioning.

Conclusions:

• The identified classes provide a clearer framework for understanding sexual orientation.
• The Multivariate Sexual Orientation Classification System offers a validated, efficient tool for research applications.
• This classification approach has implications for research and understanding psychological functioning and risk behaviors across sexual orientations.