The concept of a Performance Scale
a. was introduced by Wechsler in 1939.
b. was introduced prior to the development of the Wechsler-Bellevue.
c. was found to be more applicable to adults than to children.
d. was found to be more applicable to children than to adults.
Measures of test-retest reliability are sometimes considered inappropriate for the evaluation of health status because
a. health status tests should not given at multiple points in time.
b. variations in health status may be related to true changes over time rather than measurement error.
c. there is no domain of health status.
d. health status is too complicated to measure.
In a point scale,
a. items are grouped according to age level and content.
b. points are assigned to each item.
c. items cannot be presented in order of increasing difficulty.
d. subjects receive some points even for items that are missed.
The reliability of a difference score is
a. equal to the reliability of the most reliable of the two measures.
b. equal to the reliability of the least reliable of the two measures.
c. the average reliability of the two measures.
d. expected to be lower than the reliability of either of the two measures.
The Wechsler tests employs a(n)
a. age scale concept.
b. criterion IQ concept.
c. self-reference point concept.
d. point scale concept.
Difference scores are created by
a. subtracting one test score from another.
b. subtracting the true score from a predicted score.
c. eliminating error from true scores.
d. giving a test to two different individuals.
The Wechsler-Bellevue
a. was well standardized.
b. had a normative sample consisting of a representative sample of adults.
c. included a standardization sample that was larger than any before or since.
d. used separate subscales to measure adult intelligence.
The difference between KR 20 and coefficient alpha is
a. KR 20 can be used to evaluate time sampling problems while alpha cannot.
b. Alpha can be used to evaluate time sampling problems while KR 20 cannot.
c. KR 20 can only be used for items scored right or wrong but Alpha can be used for items in any format.
d. Alpha can only be used for items scored right or wrong but KR 20 can be used for items in any format.
The original Wechsler scale was the first one that
a. was capable of directly comparing verbal and nonverbal measures.
b. used a large, representative sample.
c. used a performance scale.
d. could be generalized to various populations.
Which of the following would tend to provide the most conservative estimate of split-half reliability?
a. the Phillips method
b. the Spearman-Brown formula
c. coefficient alpha
d. the odd-even reliability coefficient
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