Thomas Personal Profile Analysis (PPA) - Test, Revise, Retest

Test, Revise, Retest

The revised PPA form was administered to a larger and more representative sample group of 500 (388 male/112 female).

A random sample of 100 was drawn from this group to determine inter-correlation among the four factors. The results indicated that the Personal Profile Analysis had a satisfactory internal consistency when assessed in this way.

To eliminate non discriminating items from the scoring key, an item analysis was initiated. A random sample of 185 (130 male/55 female) was drawn from a population of 1200. The internal consistency was confirmed and the scoring key adjusted. At this stage, the Marston dimension of SUBMISSION was changed to STEADINESS and the Marston dimension of INDUCEMENT changed to INFLUENCE.

A random sample of 100 (75 male/25 female) was selected to test the new scoring key and the results correlated against the original trials. To assess the reliability of PPA, test/retest trials were conducted on a sample of 72 (47 male/25 female) with the new scoring keys.

Read more about this topic:  Thomas Personal Profile Analysis (PPA)