Psychometrics

Question 1

Reliability

Answer 1

The trustworthiness or consistency of a measure, that is, the degree to which a test or other measurement instrument is free of random error, yielding the same results across multiple applications to the same sample

Question 2

Internal Consistency Reliability

Answer 2

The degree of interrelationship or homogeneity among the items on a test, such that they are consistent with one another and measuring the same thing

Question 3

Test-Retest Reliability

Answer 3

Provides an index of the consistency, or replicability of test scores over relatively short intervals during which scores would not be expected to change

Question 4

Alternate-Forms Reliability

Answer 4

The extent in which scores on multiple forms of a test agree with one another

Question 5

Interrater Reliability

Answer 5

The degree to which the raters agree

Question 6

Interpreting Reliability Coefficients

Answer 6

.00-.59=very low or very poor reliability
.60-.69=low or poor reliability
.70-.79=moderate or fair reliability
.80-.89=moderately high or good reliability
.90-.99=high or excellent reliability

Question 7

Standard Error of Measurement

Answer 7

An estimate of the amount of error inherent in an individual’s obtained score; the lower the reliability the higher the SEM

Question 8

Confidence Interval

Answer 8

A band, or range of scores around the obtained score that likely includes the individual’s true score

Question 9

Validity

Answer 9

How well a test measures what it claims to measure

Question 10

Content Validity

Answer 10

Whether the items within a test or other measure represent the domain being assessed

Question 11

Face Validity

Answer 11

Whether a test looks valid on the face of it

Question 12

Construct Validity

Answer 12

The degree to which a test measures a specified psychological construct or trait

Question 13

Discriminant Validity

Answer 13

refers to the extent to which measures of different domains do not correlate with each other

Question 14

Convergent Validity

Answer 14

refers to how well measures of the same domain in different formats correlate with each other

Question 15

Criterion-Related Validity

Answer 15

How adequately test scores correlate with some type of criterion or outcome

Question 16

Concurrent Validity

Answer 16

based on correlations of scores on one measure with those on a related measure

Question 17

Predictive Validity

Answer 17

based on correlations of scores on one measure with those on a criterion measure taken at a later time

Question 18

WAIS Score Interpretation

Answer 18

130 or above = Very Superior 
120-129 = Superior 
110-119 – High Average 
90-109 = Average 
80-89 = Low Average 
70-79 = Borderline 
69 or below = Extremely Low

Question 19

WISC Score Interpretation

Answer 19

130 or above =Extremely High 
120-129 = Very High 
110-119 – High Average 
90-109 = Average 
80-89 = Low Average 
70-79 = Very Low 
69 or below = Extremely Low

Question 20

Scaled Score Interpretation 3 Categories

Answer 20

Strength = 13 -19 
Average = 8-12 
Weakness = 1-7

Question 21

Scaled Score Interpretation 5 Categories

Answer 21

Exceptional strength = 16-19 
Strength = 13-16 
Average = 8-12 
Weakness = 5-7 
Exceptional weakness = 1-4