Wechsler Standardized Administration Procedures Flashcards

Raw scores on Wechsler subtests are converted to scaled scores to:

Answer: Compare performance against same-age peers on a common metric

Scaled scores place each subtest on a common, age-referenced metric (mean 10, SD 3) for fair comparison.

The standard composite/index scores on Wechsler scales have a mean and standard deviation of:

Answer: Mean 100, SD 15

Index and Full Scale composite scores use a mean of 100 and a standard deviation of 15.

Before computing index scores, the examiner must select the correct norms table based on:

Answer: The examinee's exact chronological age at testing

Norms are age-specific, so the examinee's precise chronological age determines which conversion table to use.

Calculating chronological age incorrectly most directly affects:

Answer: The selection of the norms band and thus scaled/standard scores

An incorrect age can place the examinee in the wrong norm band, distorting scaled and standard score conversions.

When a substitution of a supplemental subtest for a core subtest is permitted, it should be:

Answer: Limited per manual rules and documented, typically only when a core subtest is invalid

Substitutions are restricted by the manual, allowed only under specific conditions, and must be documented.

Confidence intervals reported around index scores serve to:

Answer: Communicate the measurement error band around the obtained score

Confidence intervals express the range within which the true score likely falls, reflecting measurement error.

Prorating a composite when one subtest is missing should be done:

Answer: Only according to manual rules and with appropriate documentation

Prorating is permitted only under specified manual conditions and must be noted because it introduces additional estimation error.