Explain the difference between an R2 and an “adjusted” R2 in a multiple regression analysis.
What will be an ideal response?
Ans: Both are effect sizes reporting the amount of variability in a criterion accounted for by the predictor variable(s). The adjusted R2 in a multiple regression analysis takes into account the quantity and quality of the predictor variables in the analysis. The R2 in a multiple regression analysis can only go up as predictor variables are added; the adjusted R2 can decrease if we add too many predictor variables and those predictor variables are of poor quality.
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Historically, the assessment of adaptive behavior has relied on the report of a third person, or ___________
Fill in the blank(s) with correct word
Research shows which of the following about at-risk students?
A) ?They thrive on structured, low-level remedial work. B) ?There is a special pedagogy and special remedial programs that work best for at- risk students. C) ?Positive changes in achievement of at-risk students can be made fairly quickly. D) ?By high school, it is simply too late for some at-risk students to learn anything significant.
_____ is the process by which a study with minimal or no risk is rapidly reviewed by fewer members than constitute the full IRB board.
a. Committee review b. Full board review c. Expedited review d. Rapid review
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