Use the Following to Answer Questions

question 43

Multiple Choice

Use the following to answer questions:
Figure: Game-Day Shirts
-(Figure: Game-Day Shirts) Rick is one of 10 vendors who sell game-day T-shirts at football games in a perfectly competitive market. His costs are identical to the costs of the other 9 vendors. If the price of a shirt is $9, the short-run industry supply will be _____ shirts.

• A) 140
• B) 200
• C) 220
• D) 240

---

Definitions:

Changing Criterion Design

An experimental design in which the effect of the intervention is demonstrated by how well the behavior matches a criterion that is systematically altered.

Reversal Design

A research design often used in behavior analysis, where a behavior is measured before and after an intervention, and then the intervention is withdrawn to see if behavior returns to baseline levels.

Changing Criterion Design

An experimental design in which the intervention's effectiveness is demonstrated by gradually altering the criterion for reinforcement to shape a target behavior.

Performance Level

The degree or standard of proficiency or achievement demonstrated by an individual or group in tasks or activities.