Section 11: Assessment Flashcards
Norm vs criterion referenced score
A norm referenced score provides information on how a person performed relative to others in the group. (e.g. standard scores, t scores, percentiles)
A criterion referenced score provides information on how much of the content the person has mastered (e.g. the number of correct items obtained on the test, or percentage correct)
Objective vs subjective tests
An objective test does not rely on a rater’s judgment for scoring, and it has a scoring key used to score the items. Examples include MMPI-2 and the EPPP.
Subjectively scored tests involve some element of the rater’s judgment such as the TAT and the Rorschach.
Normative vs ipsative score
A normative score tells us how someone performed relative to others (e.g. t score, percentile rank)
An ipsative score provides information on the relative strengths and weaknesses of the person only and does not compare the person to others. (Examples: vocational preference tests such as the Strong Campbell)
Empirical criterion keying
A process for selecting items to be used in a test. The items are keyed to an external criterion, and are intended to differentiate between groups of people who have a particular trait and those who do not.
(e.g. the developers of the MMPI first generated a pool of items for possible use on the Scale 8 (schizophrenia scale). Only those items that were found to differentiate between normals and people with schizophrenia were ultimately included in the test. )
“G factor”
Spearman proposed that intelligence is a single factor which he termed “g factor”. Spearman observed that scores on various tests of mental abilities tend to correlate with each other.
The most widely used tests of intelligence ( e.g. the Wechsler tests and the Stanford-Binet) measure the “g factor”
WAIS IV factors: Verbal Comprehension, Perceptual Reasoning, Working Memory,
Processing Speed
- WAIS IV is appropriate for 16-0 to 90-11 years of age.
- Has 10 core subtests and 5 supplemental subtests.
- Allows calculation for of FSIQ, 4 primary index scores and General Ability Index
- IQ score and indexes have a mean of 100, Standard deviation of 15, subtests have a mean of 10 and standard deviation of 3
WAIS-IV: VCI
Verbal comprehension index includes subtests of similarities, vocabulary, and information.
- comprehension is a supplemental subtest
- is a measure of verbal comprehension abilities. which typically are considered to be a form of crystallized intelligence.
WAIS-IV: PRI
Perceptual Reasoning Index includes the subtests of block design, matrix reasoning, and visual puzzles.
-picture completion and figure weights are supplemental subtests
- is a measure of perceptual reasoning abilities which are considered to be a form of fluid abilities.
WISC-IV/WAIS-IV factors: WMI
Working memory Index includes digit span and arithmetic. Letter number sequencing is a supplemental subtest.
WISC-IV/WAIS-IV factors: PSI
Processing speed index consists of the subtests of symbol search and coding. Cancellation is a supplemental subtest.
WISC-IV/WAIS-IV factors: GAI
Optional general ability index consists of a composite of scores on the verbal comprehension and perceptual reasoning subtests. Its used when examiners want to calculate a summary score that minimizes the influence of working memory and processing speed.
Pattern or scatter analysis
-look at discrepancies between subtests. Such analysis has not been found to be valid for making diagnoses and in particular can result in too many false positives. Measurement error alone may account for differences noted between subtests
When to use PIQ vs VIQ
Are no longer provided. When these scores are required for clinical decision making or to fulfill legal or educational regulations, the verbal comprehension index may be substituted for the VIQ and the PRI may be substituted for the PIQ.
- VCI is a measure of verbal comprehension abilities, typically considered to be a form of crystallized intelligence.
-PRI is a measure of perceptual reasoning abilities which are considered to be a form of fluid abilities.
L, F, K on MMPI
- L is the Lie scale. A high score indicates that teh person is making a naive attempt to present him or herself in an overly favorable light. (typically in the normal range
- F is the infrequency (fake bad) scale, includes items that were endorsed by less than 10% of people in the standardization sample
- K scale is the guardedness scale. High scores suggest that the person is making a more sophisticated attempt to present him or herself in a positive light (“fake good”)