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A PAS profile of an individual may be obtained in one of several ways. Historically, the development of the system and nearly all of the research base and clinical use was based on using either the Wechsler-Bellevue or WAIS assessment tools. There was a slightly modifed version of the Wechsler-Bellevue tools called the WB/G (G for Gittinger) also used.

Later versions of the Wechsler, especially newer than the WAIS-R are not suitable for PAS use.

The theory is built around information that comes from the variablity in the subtests of the WB and WAIS instruments.

For a thorough discussion of the relationship of the Wechsler Scales to the PAS, see "Wechsler Scores and the PAS.

In addition, much work has been done on indirect assessment which can take several forms:

• A questionaire. This is research in progress. You can see a version of such work on this web site. This is not a validated tool, but research in progress.
• Interviews and other instruments.
• Reading about behavior and reading speeches (or seeing) from the person. This method was used by Gittinger and his associates in intelligence work.