: The dynamic and bidirectional interactions between individuals and their environments.

By moving from Level 1 to Level 8, personology becomes a capable of explaining why a person behaves inconsistently across settings—not because of “false” traits, but because each level activates different layers of the personality system.

Initially, personology focused on individual-level factors, examining the psychological structures, processes, and traits that define a person's personality. However, as researchers began to recognize the significance of contextual factors, the field expanded to incorporate social and environmental influences. This shift from a solely individual-centric approach to a more holistic, ecosystemic perspective acknowledges that human behavior and development are embedded within complex networks of relationships.

Are you currently studying this framework? What are your biggest takeaways from the shift to systemic thinking? Let us know in the comments.

This article explores the core concepts of this text, including the "85 work" or the 5th edition, examining how personology enables us to understand human behavior by analyzing the person within the context of their developmental, social, and environmental systems. 1. What is Personology?

Robert S. McCully's work on personology has been pivotal in shaping the field. His book, "Personology: From Individual to Ecosystem," provides a comprehensive overview of the personology framework, emphasizing the need for a holistic, ecosystemic approach to understanding human behavior. McCully's work highlights the significance of considering the complex interactions between individuals and their environments, providing a nuanced understanding of human behavior.

In recent years, personology has undergone a significant shift, recognizing that human behavior is shaped by the complex interplay between individual characteristics, social relationships, and environmental factors. This ecosystemic approach acknowledges that individuals are embedded in a network of relationships, from intimate relationships with family and friends to broader social and cultural contexts.

For those studying this subject, obtaining the official 5th edition ePDF from Unisa Enterprise is highly recommended for access to the most recent research and practical examples.

Suggested citation for this article: Personology Review, 2025. “Personology from Individual to Ecosystem: The 85‑Work Framework.” Integrating Murray, Bronfenbrenner, and Craik’s paginated legacy.

Personology asks a different question: Where is this person?

Murray, H. A. (1937). The effect of psychological castration on a group of adult human subjects. Psychological Review, 44(2), 232-246.