Exam 10: Complex Experimental Designs

A researcher is interested in variables that may affect an individual's driving ability.He has people drive a course in wet,dry,or icy conditions.In addition,he has them drive a vehicle with or without power steering,and with an automatic or a manual transmission.This design is an example of a _____ factorial.

Which of the following is NOT true of a study with only one independent variable?

A researcher attempts to study the effects of alcohol on task performance.One factor is alcohol-alcohol treatment versus placebo control-and the other factor is task difficulty-easy versus difficult.If the researcher uses a completely repeated measures design with 15 participants per condition,how many participants will he need for the study?

An IV × PV design has:

A researcher conducts an experiment in which half of the number of participants read a story designed to reduce prejudice (story group),whereas the other half read material unrelated to prejudice (control group).After reading the material,half of the participants describe a minority group while alone,and the other half describes a minority group in the presence of their peers.The dependent variable is the number of positive statements made about the minority group.The mean number of positive statements in the four conditions was: Although the final conclusions would be based on statistical significance tests,these results indicate a(n)_____.

In a study examining the effect of room illumination (low,medium,high)and room temperature (cold,warm,hot)on test performance,how many main effects are possible?

Which of the following is true of factorial designs?

A marketing company wants to determine which cola beverage is most preferred by consumers.A group of participants tastes Cola A and then rates the taste.The group then tastes Cola B and rates the taste for this cola.A second group of participants follows the same procedure.However,they first taste Cola B and then Cola A.This is an example of a(n)_____ type of design.

A 4 × 5 factorial design would have _____ conditions.

A researcher designs a study where participants are randomly assigned to one of the two conditions.Each participant is then measured under two different circumstances.This is an example of a(n)_____ design.

A 2 × 2 × 2 design results in _____ experimental conditions.

An investigator wants to test the effectiveness of visualization on sports performance.She randomly assigns participants to two groups.Participants in the visualization group imagine themselves swinging a golf club perfectly for 20 minutes prior to a session on the driving range.Participants in the control group read Golf magazine for 20 minutes prior to a session on the driving range.All participants do this procedure each day for five days.The dependent measure,the average flight distance of the ball,is calculated for each participant after each session.This is an example of a _____ design.

Which of the following is true of interactions?

In order to ascertain the main effect of an independent variable,a researcher must use a(n)_____ design.

Dr.Parker finds that judgments of responsibility for an automobile accident is greater for male drivers if the outcome is severe than mild.However,for female drivers,ratings are the same irrespective of the outcome.These findings suggest:

Which of the following is true of a 2 × 3 factorial design?

If a researcher has male and female participants drive a course under dry or wet road conditions,what kind of research design does he or she have?

A problem with designing an experiment with only two levels of the independent variable is that:

Mary found an interaction between a defendant's gender (male or female)and their appearance (attractive or unattractive)on judgments of criminal behavior.She analyzes the difference between judgments for unattractive defendants who are male or female.She then performs the same analysis for attractive males and females.Mary has examined the:

A researcher examines the physical attractiveness of a driver involved in an automobile accident (unattractive,average,or attractive)and the severity of damage caused ($500,$1500,or $2500)on judgments of responsibility assigned to the driver.Which of the following represents the factorial design?