A Psychologist Tests the Effect of an Incentive Program (I

question 9

Multiple Choice

A psychologist tests the effect of an incentive program (i.e.,positive reinforcement for desired behavior) in a residential treatment facility for delinquent youth.He randomly assigns one building of the large facility to receive the treatment.Residents in a second building serve as a control group.During the course of the one-month study,an event happens in the treatment group that forces full lockdown of the building for one week.The threat to internal validity the psychologist must consider is

• A) selection.
• B) history.
• C) additive effect of selection and history.
• D) contamination.

---

Definitions:

Accumulated Depreciation

The total depreciation for a fixed asset that has been charged to expense since that asset was acquired and made available for use.

Accrued Revenue

Revenue earned but not yet received in cash or recorded at the statement date, usually recognized in accrual basis accounting.

Snow Removal Services

Companies or departments dedicated to clearing snow and ice from outdoor surfaces, such as roads and walkways, to ensure safety and accessibility.

Adjusting Entries

Entries recorded at the conclusion of an accounting period to adjust the account balances prior to the creation of financial statements.