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_______________ effects, such as genetics and maturational forces, and ________________ influences, such as culture, parenting styles, and learning experiences are thought to contribute to a person’s developmental stage (Sigelman & Rider, 2009).
What are biological and environmental?
Reference
Sigelman, C. K. & Rider, E., A. (2009). Life-Span human development (6th. ed.). Belmont, CA. Wadsworth Cengage Learning.