In a study involving performance on a mathematics test as the dependent variable, if a statistical adjustment were used, which of the following would best serve as the statistical control?
a. type of school in which the student is enrolled
b. score an on academic aptitude test
c. socio-economic background of the student's family
d. a measure of teacher effectiveness
b
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Using the ______ design, a researcher compares the difference between scores before and following a treatment.
A. nonequivalent control group pretest–posttest B. nonequivalent control group posttest-only C. one-group pretest–posttest D. one-group posttest-only
A researcher finds out in an experimental study that a special program on binge drinking lowers the use of alcohol in the residential dormitories of a small college in the Midwest. Excited about the results, the investigator draws conclusions in the research report for use of this program in a nearby university. What potential threat to validity exists in this experiment?
a. Statistical conclusion validity b. Construct validity c. Internal validity d. External validity
Which of the following is true?
A. ANCOVA is a way of partitioning two-way ANOVAs to create separate tests of significance. B. ANCOVA is a non-parametric version of ANOVA. C. ANCOVA is an extension of ANOVA. D. ANCOVA is a way of testing the statistical significance of ANOVAs.
Developmental Delay covers age ranges:
a. 3 through 7 years of age b. 3 through 9 years of age c. 3 through 12 years of age d. 3 through 21 years of age