Week 11

1. 1A researcher may design an experiment with more than two levels of the independent variable because

   1. Ait may be difficult to provide information about the exact relationship between the independent variable and the dependent variable.
   2. Bwith only two levels of the independent variable, a curvilinear relationship cannot be detected.
   3. Cresearchers are often interested in comparing more than two groups.
   4. DAll of these
2. 2An interaction occurs whenever

   1. Athe manipulation check indicates a manipulation failure.
   2. Bthe effect of one independent variable changes across levels of a second independent variable.
   3. Cboth independent variables have an effect.
   4. Dthe dependent variable is effectively manipulated in a factorial design.
3. 3If a researcher believes a non-monotonic relationship may exist between two variables, she will need to

   1. Amanipulate two or more independent variables.
   2. Bhave a stronger manipulation than for a monotonic relationship.
   3. Cinclude more than two levels of the independent variable
   4. Dmeasure more than one dependent variable.
4. 4A simple main effect analysis examines

   1. Athe overall effect of one independent variable.
   2. Bmean differences at each level of the independent variable.
   3. Cthe overall effect of the interaction.
   4. Dthe simplest main effect.
5. 5An IV x PV design

   1. Aallows the manipulation of a participant variable.
   2. Ballows the researcher to investigate how different types of individuals respond to the same manipulated variable.
   3. Callows measurement of the participant variable.
   4. DAll of these
6. 6Dunn and colleagues (2005) conducted an experiment of the relationship between exercise and depression. Participants were randomly assigned to either a low energy or high energy condition, and were also assigned to work out 3 days a week, while other participants worked out 5 days a week. Identify the independent variable(s) in this study.

   1. Aenergy condition
   2. Bnumber of days working out during the week
   3. Cenergy condition and number of days working out during the week
   4. Ddepression
7. 7In a factorial design, the effect of a moderating variable is revealed as a(n)

   1. Amain effect.
   2. Bsimple main effect.
   3. Cinteraction.
   4. Dparticipant variable (PV).
8. 8A researcher finds that for male applicants, the likelihood of being hired for a job increases as their work experience increases. However, for female applicants, the likelihood of being hired is not influenced by the amount of work experience. Which of the following is correct?

   1. AThere is an interaction between gender and work experience for male applicants.
   2. BThere is no interaction between gender and work experience for female applicants.
   3. CThere is an interaction between gender and work experience.
   4. DAll of these.
9. 9A factorial design involves

   1. Amanipulating two or more independent variables.
   2. Ban inability to specify the overall effect of an independent variable.
   3. Chaving multiple dependent measures.
   4. DAll of these.
10. 10A researcher conducts an experiment in which half of the participants read a story designed to reduce prejudice (story group), whereas the other half of the participants 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:
    Alone Peer
    Control 1 2
    Story 5 1
    Although the final conclusions would be based on statistical significance tests, these results indicate a(n)
    Select one:

    1. Amain effect of the control versus story variable.
    2. Bmain effect of the alone versus peer group variable.
    3. Cinteraction.
    4. DAll of these

11. 11You design an experiment that manipulates the following variables: method of presenting material (visual, auditory); difficulty of material (easy, difficult); and amount of material (low, moderate, high). For a completely independent groups design with 10 participants per group, how many participants will you need?

    1. A80
    2. B120
    3. C70
    4. D60
12. 12In 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?

    1. A2
    2. B3
    3. C6
    4. D9
13. 13In a factorial design, a main effect is the

    1. Aeffect of one independent variable at one level of another independent variable.
    2. Beffect of one independent variable averaged over the levels of the other independent variable(s).
    3. Conly effect of interest.
    4. DNone of these
14. 14A researcher designs a study where participants are randomly assigned to one of two conditions. Each participant is then measured under two different circumstances. This is an example of a(n) _____ design.

    1. A independent groups
    2. Brepeated measures
    3. Cmixed factorial
    4. DAll of these
15. 15A 4 x 5 factorial design would have how many conditions?

    1. A4
    2. B5
    3. C9
    4. D20

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Test sobre Week 11, creado por ashleighdawn el 26/05/2015.

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