Katie Morbey
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Psychology Quiz on Week 3, created by Katie Morbey on 19/05/2019.

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Katie Morbey
Created by Katie Morbey almost 5 years ago
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Week 3

Question 1 of 6

1

Which of the following are sources of variance?

Select one of the following:

  • The within group differences

  • The error

  • The treatment

  • All of the these

Explanation

Question 2 of 6

1

Why would you use post-hoc tests instead of planned contrasts?

Select one of the following:

  • We are interested in testing all possible comparisons

  • There is a need to improve the power of the test

  • We are not interested in testing all possible comparisons

  • There are not that many comparisons to make

Explanation

Question 3 of 6

1

How can you improve the power of your experiment?

Select one of the following:

  • Reducing the degrees of freedom for the residual source of variance

  • Increasing the number of levels of treatment

  • Increasing the number of participants

  • All of these

Explanation

Question 4 of 6

1

The power of a test is the probability of...

Select one of the following:

  • accepting the alternative hypothesis when incorrect

  • rejecting the null hypothesis when incorrect

  • accepting the null hypothesis when correct

  • rejecting the alternative hypothesis when incorrect

Explanation

Question 5 of 6

1

Imagine that you are a Clinical Neuropsychologist who works with language difficulties shown by Aphasics resulting from a brain stroke. You are interested in studying the impact of a particular treatment as a function of the time interval between the time of the lesion and the time of intervention. If you want to maximize the power of the study, which groups would you use?

Select one of the following:

  • two groups: 1) immediately after the stroke 2) three weeks later

  • two groups: 1) three weeks later 2) six months later

  • two groups: 1) immediately after stroke 2) six months later

  • three groups: 1) immediately after the stroke 2) three weeks later 3) 6 months later

Explanation

Question 6 of 6

1

If you take steps to minimize a Type I error, then the probability of making a Type II error is

Select one of the following:

  • Cut in half

  • Unaffected

  • Increased

  • Also decreased

Explanation

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