Impulsivity is a stable, measurable, and predictive psychological trait.

Area of Science:

• Psychology
• Behavioral Science
• Personality Research

Background:

• Impulsivity is a key personality trait, but inconsistent definitions and measurements have led to debate about its validity.
• Previous research has struggled to reconcile self-report and behavioral measures of impulsivity.

Purpose of the Study:

• To address inconsistencies in impulsivity measurement through a large-scale study.
• To investigate the underlying structure of impulsivity and develop a reliable measurement tool.

Main Methods:

• A large sample (N=1,676) completed 48 impulsivity measures (self-report and behavioral) and reported related behaviors.
• Bifactor analysis identified a general impulsivity factor (I) and six specific factors.
• A new scale, the Adjustable Impulsivity Scale (AIMS), was developed to measure factor I.

Main Results:

• Correlations were higher among self-report measures than behavioral tasks or between self-report and behavioral measures.
• General factor I, primarily from self-reports, showed high reliability and predictive power for impulsivity-related behaviors.
• The AIMS scale demonstrated excellent psychometric properties and predictive validity, even in shorter versions.

Conclusions:

• Impulsivity is a stable, measurable, and predictive psychological construct, contrary to some recent suggestions.
• The bifactorial structure of impulsivity and the AIMS scale offer significant advancements in conceptualization and measurement.
• This research supports the continued use and refinement of impulsivity as a valid psychological construct.