Exam 9: Experimental Research

Define the following terms -debrief

In 1988,the Canadian federal government raised the speed limit to 110 km/h.Then,in 1996,individual provincial governments were given the choice to decide the highway speed limit in their own provinces and thus many raised it to 120 km/h.Proponents and critics of the law have looked at the number of traffic deaths per 1000 kilometres driven on the highways between 1988 and 1998 to see whether the law had any impact on traffic deaths.What type of design is this?

Diagram the design notation for a classical experimental design.What do each of the symbols represent?

Define the following terms -classical experimental design

What does the Hawthorne effect refer to?

Define the following terms -quasi-experimental designs

Graduate student Fanny Feisty designed and produced a 30-second radio commercial for Reliable Randy's Used Cars.Next,she had the three most widely listened to local radio stations air the commercial 15 times a day for two weeks.She waited until the end of the two-week period and then called Randy to check on his recent sales.What experimental design did she use?

Define the following terms -natural experiment

Define the following terms -science of the sophomore

Tommy Tackle,the coach at Coastal Mountain High School,is designing a training program for the track team.He knows that exercises A,B,and C are recommended,but is not sure which order he should have his team members train in (i.e.,A,B,C,or C,A,B,etc.).What type of experimental design would he use to test the relative effectiveness of the different training sequences?

Define the following terms -experimental group

If the time between the pretest and the post-test is very short,then

Compare and contrast interrupted and equivalent time series designs.What is common to both of them? What is unique to each of them? How do interrupted and equivalent time series designs differ from pre-experimental designs?

Define the following terms -design notation

Define the following terms -testing effect

A local mayoral candidate hired Xavier Xed to test whether the method of distributing campaign literature resulted in more people voting for a candidate.He distributed campaign literature about the mayoral candidate to the Stevenson neighbourhood in a bright blue envelope that a volunteer placed at each person's front door.He distributed the same campaign literature about the candidate to residents of the Fairwinds neighbourhood by mailing it in a plain white envelope.He later learned that Stevenson was a low-income area of the city that was almost entirely Filipino,foreign-born,and 95 percent Catholic.Fairwinds was an upper-income area in the city and its residents were 100 percent white,Canadian-born Protestants.What problem with internal validity might threaten the results of his experiment?

Sorting a collection of cases into two or more groups is referred to as _____,whereas _____ refers to selecting a smaller subset of cases from a larger pool of cases.

Define the following terms -random assignment

Define the following terms -external validity

Define the following terms -internal validity