Measurement and Methodology [GRE (Graduate Record Examinations) Psychology]: Questions 12 - 14 of 135

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Question 12

Question MCQ▾

Statistics are used in psychological research to ________.

Choices

Choice (5)Response

a.

Evaluate the likelihood that the experiment caused the differences in behavior across treatment conditions.

b.

Prove the null hypothesis.

c.

Prove that the research hypothesis is correct.

d.

Justify the experimenter՚s conclusions.

e.

Quantify the dependent variable.

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Question 13

Question MCQ▾

A behavioral observation checklist requires the observer to note whether the person being observed smiles. A key source of error variance resulting from this requirement is

Choices

Choice (5)Response

a.

item sampling variance.

b.

content variance.

c.

scoring variance.

d.

All of the above

e.

Question does not provide sufficient data or is vague

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Question 14

Question MCQ▾

The amount of variance in scores accounted for by a correlation coefficient of -0.70 is

Choices

Choice (5)Response

a.

less than zero because the correlation is negative

b.

indeterminate because the correlation is negative

c.

14% if the reliability of the measures is greater than . 70

d.

almost 50% if the reliability of the measures is + 1.00

e.

70% if the reliability of the measures is + 1.00

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