An advertising firm hired by Multinational Motors wants to demonstrate that its advertising campaigns improve Canadian public perceptions of Multinational Motors' vehicles.The advertising firm surveys Canadians every year over the course of its 10-year contract with Multinational Motors.Each year,Canadian public perceptions of Multinational Motors increased with the exception of 2009.Just prior to conducting the 2009 survey,Multinational Motors was forced to recall an entire line of vehicles with defective brake systems,which resulted in several,highly-publicized deaths.What threat to internal validity might the results of the 2009 survey reflect?
A)Testing effect
B)Mortality
C)Maturation
D)History effect
E)Instrumentation

Question

Quizplus · Accepted Answer

The 2009 survey's results may reflect a history effect, as the highly-publicized deaths caused by the defective brake systems may have influenced Canadians' perceptions of Multinational Motors' vehicles in a way that had nothing to do with the advertising campaigns.

An Advertising Firm Hired by Multinational Motors Wants to Demonstrate