MsHernandez Is Concerned About Brian, a Student in Her High

question 5

Multiple Choice

Ms.Hernandez is concerned about Brian, a student in her high school chemistry class who rarely interacts with other students.Ms.Hernandez decides to smile at Brian on those occasions when she happens to notice him talking with another student.Yet after three weeks she sees little change in his behavior.Based on this information, which one of the following is definitely wrong with Ms.Hernandez's approach?

• A)A smile is not an effective reinforcer.
• B)Brian has little to gain by changing his behavior.
• C)Social interaction is not an intrinsically reinforcing activity.
• D)Brian is receiving intermittent rather than continuous reinforcement.

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Definitions:

Market Share

The percentage of an industry's sales that a particular company controls.

Herfindahl-Hirschman Index

A measure of market concentration used to determine the level of competition within an industry, calculated by summing the squares of the market shares of all firms in the market.

Marginal Revenue

The additional income that is gained from selling one more unit of a good or service, crucial for businesses when deciding how much to produce.

Total Cost

The complete cost of production that includes both fixed and variable costs incurred in creating goods or services.