The Two-Stage Model of Brain and Behavior Development was developed to explain hormonal influences on aggression in male Syrian hamsters. Briefly summarize the Two-Stage Model and explain how it differs from the classical Organizational/Activational Model. a. Briefly summarize the Two-Stage Model (~1-3 sentences) b. Explain how the Two-Stage Model differs from the classical Organizational/Activational Model (~1-2 sentences)

Ciccarelli: Psychology_5 (5th Edition)
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Chapter1: The Science Of Psychology
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**Title: Understanding the Two-Stage Model of Brain and Behavior Development in Male Syrian Hamsters**

The Two-Stage Model of Brain and Behavior Development was developed to explain hormonal influences on aggression in male Syrian hamsters. This model provides a nuanced understanding of how hormonal changes at different developmental stages impact behavior.

### Briefly summarize the Two-Stage Model (~1-3 sentences)
The Two-Stage Model proposes that brain and behavior development occur in two distinct phases. The first stage, called the organizational phase, occurs early in life and is characterized by the permanent influence of hormones on brain structures. The second stage, termed the activational phase, occurs later and involves hormones activating previously organized brain circuits to influence behavior.

### Explain how the Two-Stage Model differs from the classical Organizational/Activational Model (~1-2 sentences)
The Two-Stage Model differs from the classical Organizational/Activational Model by emphasizing not only the permanent changes induced during the organizational phase but also the subsequent activation of these changes in the activational phase. This highlights an interdependent relationship between early organizational effects and later activational effects, whereas the classical model treats these phases more independently.
Transcribed Image Text:**Title: Understanding the Two-Stage Model of Brain and Behavior Development in Male Syrian Hamsters** The Two-Stage Model of Brain and Behavior Development was developed to explain hormonal influences on aggression in male Syrian hamsters. This model provides a nuanced understanding of how hormonal changes at different developmental stages impact behavior. ### Briefly summarize the Two-Stage Model (~1-3 sentences) The Two-Stage Model proposes that brain and behavior development occur in two distinct phases. The first stage, called the organizational phase, occurs early in life and is characterized by the permanent influence of hormones on brain structures. The second stage, termed the activational phase, occurs later and involves hormones activating previously organized brain circuits to influence behavior. ### Explain how the Two-Stage Model differs from the classical Organizational/Activational Model (~1-2 sentences) The Two-Stage Model differs from the classical Organizational/Activational Model by emphasizing not only the permanent changes induced during the organizational phase but also the subsequent activation of these changes in the activational phase. This highlights an interdependent relationship between early organizational effects and later activational effects, whereas the classical model treats these phases more independently.
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