Increase of personality response consistency by prior response

Area of Science:

• Psychological assessment
• Personality psychology
• Psychometrics

Background:

• Personality response consistency is a key factor in psychological assessment reliability.
• Previous research suggests that repeated testing may influence response patterns.

Purpose of the Study:

• To investigate the effect of repeated administration of the Minnesota Multiphasic Personality Inventory (MMPI) on response consistency.
• To examine whether prior response influences personality assessment outcomes.

Main Methods:

• Twenty-nine participants completed the MMPI weekly for four consecutive weeks.
• Scale reliabilities and correlations of standard score patterns were analyzed across different trial periods (1-2 vs. 3-4).
• Split-half reliability and test-retest reliability were assessed.

Main Results:

• Scale reliabilities and correlations of standard score patterns were significantly higher in later trials (3-4) compared to earlier trials (1-2).
• A negatively accelerated decreasing curve of novelty was proposed to explain the increased consistency.
• Moderate intercorrelation was found between split-half and test-retest reliability measures.
• Support was found for the hypothesis that maladjustment scores decrease upon retesting.

Conclusions:

• Prior response enhances personality response consistency in psychological assessments like the MMPI.
• The findings support a general hypothesis that familiarity with a test increases the stability of personality measures.
• The study suggests that repeated administrations of personality inventories may lead to more reliable and consistent scores over time.