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eBook
Other

Psych Web: Psychology: An Introduction: Chapter 12: Defining Abnormal Behavior

For Students 9th - 10th
Describes the different criteria that can be used to identify behavior that is abnormal. Includes comprehension questions.
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Article
Other

E Learn Portal: Origins of Treatment and Defining Abnormal Behavior Continued

For Students 9th - 10th
Provides an overview of the various theories of how to explain abnormal behaviors.