Adjective Checklist

Abstract

The Adjective Check List (ACL) is a highly regarded psychological assessment instrument developed by Harrison G. Gough and Alfred B. Heilbrun, Jr. It is a self-report questionnaire composed of 300 descriptive adjectives designed to capture various facets of personality. Respondents indicate which adjectives they believe describe themselves, or another target individual, in a specific context. The ACL is used to measure an individual’s personality traits, level of psychological adjustment, and emotional stability. It provides a comprehensive profile across 37 distinct scales, making it valuable for both clinical diagnosis and extensive personality research.

Keywords

Adjective Check List, ACL, Personality traits, Self-report, Psychological measurement, Adjustment, Emotional stability, Clinical assessment, Counseling, Origence-Intellectence.

Authors

Harrison G. Gough, Alfred B. Heilbrun, Jr.

Purpose

The primary purpose of the ACL is to offer a swift, flexible, and robust method for assessing descriptive personality characteristics. By utilizing a simple checklist format, it minimizes the cognitive burden often associated with complex Likert-scale questionnaires, thereby facilitating rapid administration and scoring. The tool is designed to assess how an individual views their own behavioral tendencies and attributes, or to capture the perceptions of an observer regarding the individual being rated.

The ACL is widely applied across various professional domains. In clinical settings, it aids practitioners in diagnosing mental health issues, such as depression and anxiety, by quantifying psychological health and adjustment levels. In research, the ACL is instrumental in measuring specific personality traits and enabling comparative studies between different population groups based on nuanced personality profiles.

Construct

The ACL measures a wide range of psychological constructs, organized into 37 scales that fall under five major conceptual groupings. The overall construct measured is the descriptive representation of an individual’s personality structure and behavioral style. This structure is comprehensive, integrating both descriptive traits and motivational components.

The scale sets draw heavily upon established psychological frameworks. For example, the 15 Need Scales are based on Henry Murray’s theory of needs, assessing underlying motivational drives. Other scales address interpersonal functioning, cognitive styles (such as the Origence-Intellectence dimensions), and behavioral patterns detailed within Transactional Analysis theory. This multi-faceted approach ensures that the ACL provides a detailed and interconnected view of personality dynamics.

Validity

The ACL is recognized as a highly valid instrument for personality assessment, backed by decades of empirical data. Its construct validity is supported by consistent findings showing meaningful correlations between ACL scores and measures derived from other standardized personality inventories. The scale’s ability to differentiate between groups known to possess specific characteristics (e.g., creative versus non-creative individuals, as demonstrated by Gough’s work on the Creative Personality Scale) further confirms its utility in measuring intended constructs.

Furthermore, the ACL exhibits strong predictive validity, particularly in counseling and educational contexts. Early research by Heilbrun demonstrated the ACL’s effectiveness in predicting outcomes such as counseling readiness and identifying students prone to early college drop-out, confirming its practical relevance in forecasting behavioral tendencies related to adjustment and motivation.

Reliability

The Adjective Check List demonstrates good reliability across its various scales. While the ipsative nature of the checklist format (where checking one adjective may influence the interpretation of others) requires careful consideration of internal consistency metrics, the scale scores generally exhibit high stability over time. Test-retest reliability coefficients, typically reported in the scale manual, confirm that the ACL provides consistent measurements of enduring personality dimensions when administered across reasonable time intervals.

The comprehensive nature of the manual provides detailed reliability data for each of the 37 scales across diverse normative samples, ensuring users can evaluate the measurement stability pertinent to their specific application. This robust psychometric foundation allows the ACL to be used reliably for clinical evaluations, research studies, and individual development planning.

Factor Analysis

Factor analysis studies conducted on the ACL have successfully identified the underlying structure of the inventory, demonstrating that the 37 scales organize themselves into meaningful, higher-order factors. These analyses support the hierarchical organization of personality traits measured by the instrument. The results often align with broader dimensions recognized in contemporary personality psychology.

The five main conceptual groupings—modus operandi, need, topical, transactional analysis, and origence-intellectence—are themselves products of extensive correlational and factor analytic research. They provide a structural framework for interpreting the complex interplay of the measured characteristics, confirming that the ACL effectively taps into fundamental components of human personality.

Instrument

Test Type: Self-report Inventory; Descriptive Personality Assessment Tool

Format: Checklist of 300 adjectives; binary response (check if applicable or leave blank).

Language Available: Primarily English; standardized translations exist in several major European and Asian languages for research applications.

Population Group: General population, including clinical, counseling, educational, and occupational samples.

Age Group: Typically utilized with adolescents (age 16 and older) and adults.

Population Details: The scale has extensive normative data spanning various demographic groups, including college students, high school students, and adults from the general working population, facilitating cross-group comparisons.

Test Methodology: The respondent is given a list of adjectives and instructed to mark those that they feel are self-descriptive. Administration time is brief, usually taking 15 to 20 minutes. Scoring involves counting the marked adjectives corresponding to the 37 scales, followed by conversion to standardized T-scores.

Keywords

Psychological assessment, Personality measurement, H.G. Gough, A.B. Heilbrun, Counseling psychology, Self-concept, Transactional Analysis, Origence, Intellectence, Need scales.

Authors

Author ORCID Identifier: N/A

Affiliation Email addresses: N/A

Correspondence Address: CPP, Inc. (Current Publisher/Distributor)

Permissions & Fee and Test Year

The Adjective Check List is a proprietary instrument protected by copyright, currently published by CPP, Inc. (formerly Consulting Psychologists Press). Professional use requires the purchase of the manual, test forms, and scoring services or software. Administration and interpretation should be conducted by qualified professionals trained in psychological assessment.

Test Year (Initial Publication): 1960 (First academic appearance); 1965 (First comprehensive manual).

Reference’s

• Gough, H. G. (1960). The Adjective Check List as a personality assessment research technique. Psychological Reports, 6, 107-122.
• Heilbrun, A. B. (1961). Male and female personality correlates of early termination in counseling. Journal of Counseling Psychology, 8, 31-36.
• Heilbrun, A. B. (1962). Prediction of first year drop-out of female college students by means of the adjective check list need scales. Journal of Counseling Psychology, 9, 58-63.
• Heilbrun, A. B., Jr., & Sullivan, D. J. (1962). The prediction of counseling readiness. Personnel and Guidance Journal, 41, 112-117.
• Gough, H. G. and Heilbrun, A. B., Jr. (1965). The adjective check list manual. Palo Alto, California: Consulting Psychologists Press.
• Robinson, John P., Shaver, Phillip R. (1969). Measures of Political Attitudes. Institute for Social Research, University of Michigan. Ann Arbor, Michigan.
• Gough, H. G. (1979). A creative personality scale for the Adjective Check List. Journal of Personality and Social Psychology, 37, 1398-1405.
• Gough, H.G.; Heilbrun, Jr., A.B. (2007). Adjective Check List Manual (1983 ed.). Palo Alto, CA: CPP, Inc.

Items of the Adjective Check List

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way.

• modus operandi (4 scales)
• need (15 scales)
• topical (9 scales)
• transactional analysis (5 scales)
• origence-intellectence (4 scales)