It Happens Occasionally That a Student Who Is in One

question 59

Multiple Choice

It happens occasionally that a student who is in one of our classes has previously taken the class from another instructor.The repeater students will comment that the class is so much easier with us as instructors.Now, we might want to believe that we are such great instructors that student learning the dependent variable) has drastically improved because of us the independent variable) .However, which threat to internal validity better explains the increase in student learning?

• A)attrition
• B)testing
• C)diffusion of treatment
• D)instrumentation

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Definitions:

Transaction Costs

Expenses incurred during the process of buying or selling goods and services that are not directly related to their price.

Negative Externality

A cost that is suffered by a third party as a result of an economic transaction.

Externalities

Occurs when the consumption or production of a good affects someone who does not directly consume or produce that good, which can be either positive or negative.

Costs

Expenses incurred in the production of goods or in the provision of services, including labor, materials, and overheads.