A clinical psychologist hypothesises that clients assigned paper-based therapy homework (P) have higher rates of homework completion than those assigned computer-based homework (C), and that both paper-based and computer-based homework would have lower rates of completion than verbally-communicated homework (V) (i.e., homework with no written component). Which of the following sets of contrasts would be orthogonal and appropriate for testing these hypotheses? V vs. P vs. C V vs. P V vs. C P vs. C All of these sets of contrasts would be orthogonal and appropriate V vs. P & C P vs. C
A clinical psychologist hypothesises that clients assigned paper-based therapy homework (P) have higher rates of homework completion than those assigned computer-based homework (C), and that both paper-based and computer-based homework would have lower rates of completion than verbally-communicated homework (V) (i.e., homework with no written component). Which of the following sets of contrasts would be orthogonal and appropriate for testing these hypotheses?
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V vs. P vs. C |
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V vs. P V vs. C P vs. C |
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All of these sets of contrasts would be orthogonal and appropriate |
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V vs. P & C P vs. C |
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A researcher is interested in the reaction time of students and how it impacts their performance. To test this relationship, he asks 50 students to complete an online test and records their reaction times and scores. However, he notes that their responses are sensitive to their internet speed, meaning students with quick reaction times but slow internet speed may not perform up to expectations on the test, leading to unnecessary noise. In an independent groups design, what would this type of variability in test performance be called?
SSTreatment
SSSubjects
SSError
SSTotal
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