If we have conducted random selection accurately, we would be fairly confident that:
a. there are equal numbers in subject groups.
b. the independent variable has been operationally defined.
c. the sample of subjects reflects the population that we are studying.
d. confounding variables have increased in our experiment.
C
Psychology
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Because individuals show uneven ability across academic subjects, definitions of giftedness have been expanded to include
A) resourcefulness. B) divergence. C) achievement. D) talent.
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The Spearman-Brown formula is used to determine the __________ reliability of an instrument
a. item-to-item b. internal-consistency c. test-retest d. alternative-form
Psychology