Why is centring variables important in moderation analysis?
A. It ensures that all effects are removed.
B. It allows errors to be detected
C. It allows higher order effects to be interpretable
D. It allows lower-order effects to be interpretable
Answer: D
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Which of the following threats to validity is typified by a researcher missing instances of a behavior because he has created an observation tool with a narrow definition of the behavior?
a) Context insensitivity b) Researcher bias c) Instrumentation d) Sampling
__________ refers to the researcher's efforts to ensure that changes in the dependent variable are directly
related to manipulations of the independent variable. a. Baseline b. Experimental control c. Repeated measurement d. None of the above
Teaching techniques specifically designed for a particular special education population to assist with learning specific material.
a. augmentative and alternative communication b. specialized instructional structures c. communication breakdown d. specialized expanded curriculum
Find the honestly significant mean difference (HSD). What does this number mean in plain English?
A social psychologist would like to examine the relationship between personal appearance and authority. A special questionnaire is prepared which requires very careful attention to instructions in order to fill it in correctly. Three random samples of college students are obtained. For the first group, the psychologist dresses very casually (blue jeans and T-shirt) when the questionnaire is administered. For the second sample, the psychologist wears a suit, and for the third sample, the psychologist wears a very “scientific” laboratory coat. The psychologist records the number of errors made by each individual while completing the questionnaire. These data are as follows: Blue Jeans Suit Lab Coat 4 2 1 5 4 2 4 1 1 7 3 2 4 2 2