Julie runs 2 miles every day after school because it reduces the stress she feels from schoolwork. julie's running habit is maintained by a reinforcer.

negative

Explanation:

The term reinforce means to strengthen, and is used in psychology to refer to any stimulus which strengthens or increases the probability of a specific response.

Negative Reinforcement  can be seen as the act of taking something negative away in order to increase a response.

Julie runs 2 miles every day after school because it reduces the stress (negative) she feels from school work (in order to increase her response in her school work).

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