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Related Experiment Video

Updated: Mar 26, 2026

A Deep-sequencing-assisted, Spontaneous Suppressor Screen in the Fission Yeast Schizosaccharomyces pombe
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Two Replicable Suppressor Situations in Personality Research.

Delroy L Paulhus, Richard W Robins, Kali H Trzesniewski

    Multivariate Behavioral Research
    |January 26, 2016
    PubMed
    Summary

    Suppressor effects, where two predictors enhance each other

    Area of Science:

    • Psychology
    • Social Psychology
    • Personality Psychology

    Background:

    • Suppressor effects are statistical phenomena where including a second predictor variable enhances the predictive validity of the first.
    • A common skepticism exists regarding the replicability and substantive importance of suppressor effects in research.
    • This study addresses this skepticism by providing empirical examples from established psychological domains.

    Purpose of the Study:

    • To demonstrate the consistent presence and substantive importance of mutual suppressor effects in psychological research.
    • To counter the prevailing skepticism about the replicability and utility of suppressor variables.
    • To illustrate suppressor effects using established research domains: guilt/shame and self-esteem/narcissism.

    Main Methods:

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    • Regression analysis was employed to examine the relationships between predictor variables.
    • The study analyzed data from two distinct research domains: aggression and antisocial behavior.
    • Mutual suppressor effects were identified by observing changes in validity when predictors were added simultaneously.

    Main Results:

    • Guilt and shame consistently acted as mutual suppressors in predicting aggression.
    • Self-esteem and narcissism consistently acted as mutual suppressors in predicting antisocial behavior.
    • In both domains, adding one predictor significantly enhanced the predictive validity of the other.

    Conclusions:

    • Suppressor effects are not only replicable but also hold substantive importance in understanding complex psychological phenomena.
    • The findings challenge skepticism regarding suppressor variables, highlighting their role in theoretical and applied research.
    • These results underscore the value of considering suppressor effects for accurate variable selection and theoretical development.