WAIS Processing Speed Index (PSI) 2

Question 1

Which WAIS-IV subtest requires the examinee to scan a row of symbols and mark specific target symbols?

Accepted Answer

Symbol Search

Answer

Symbol Search asks examinees to scan a search group and indicate whether target symbols appear within it.

Question 2

The PSI is most sensitive to neurological conditions because processing speed is closely linked to:

Accepted Answer

White matter integrity and neural efficiency

Answer

Processing speed depends heavily on white matter tract efficiency, making it sensitive to neurological disruption.

Question 3

On the WAIS-IV, a PSI composite score is derived from how many subtests?

Accepted Answer

Two

Answer

The PSI is composed of two core subtests: Coding and Symbol Search.

Question 4

A 45-year-old shows a large discrepancy between a high VCI and a low PSI. Which explanation is LEAST likely?

Accepted Answer

Innate low verbal ability

Answer

A high VCI indicates strong verbal ability, making innate low verbal ability the least plausible explanation for the pattern.

Question 5

Which factor does the Cancellation subtest measure that Coding does NOT primarily emphasize?

Accepted Answer

Visual scanning and selective attention

Answer

Cancellation emphasizes random and structured visual scanning with selective attention to targets, beyond the graphomotor component of Coding.

(WAIS) Wechsler Adult Intelligence Scale Practice Test