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IDENTIFICATION WITH THE AGGRESSOR SCALE

Overview

OVERVIEW 

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The Identification with the Aggressor Scale (IAS) is a self-report measure assessing identification with the aggressor — a psychological process in which survivors of abuse internalize the perpetrator’s experiences, perspectives, and behaviors.

Downloads

D0WNLOADS 

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Manual

Questionnaires

Full Description

FULL DESCRIPTION

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The Identification with the Aggressor Scale (IAS) measures identification with the aggressor (IWA) — a psychological process in which survivors of abuse fuse with, adopt, or internalize their perpetrator's experiences, perspectives, and behaviors (Ferenczi, 1932, 1933; Frankel, 2002).

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Identification with the aggressor is conceptualized as a defense mechanism that emerges in abusive relational contexts. It may involve several facets:

  • Adopting the perpetrator’s experience regarding the abuse — internalizing their perspective, emotions, and beliefs

  • Identifying with the perpetrator’s aggression — internalizing aggressive tendencies

  • Replacing one’s agency with that of the perpetrator — loss of personal desires or acting according to the perpetrator’s wishes

  • Becoming hypersensitive to the perpetrator — heightened awareness of their thoughts, feelings, and potential danger
     

Target Population

  • Adults (18+) who have experienced abuse in any interpersonal context

  • Includes (but not limited to): childhood maltreatment, intimate partner violence, captivity, war-related abuse, or other interpersonal victimization

  • Applicable regardless of abuse type, severity, or timing
     

Available Languages

  • English

  • Hebrew

Korean (translation)

Terms of Use & Citation

TERMS OF USE & CITATION

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Open Access for Academic Use
Permission is not required to use, translate, or implement the IAS for non-commercial research and educational purposes. Commercial use is prohibited.

 

Required Citation
Users must cite the original validation study:
Lahav, Y., Talmon, A., & Ginzburg, K. (2021). Knowing the Abuser Inside and Out: The Development and Psychometric Evaluation of the Identification With the Aggressor Scale. Journal of Interpersonal Violence, 36(19–20), 9725–9748. https://doi.org/10.1177/0886260519872306

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For the official instrument version, please also cite:
Lahav, Y. (2026). Identification With the Aggressor Scale (IAS) — Official Manual [version 1.0]. OSF. https://doi.org/10.17605/OSF.IO/C3JXE

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Translation Policy
Researchers who translate the IAS are requested to share their translated version with the first author for archiving and quality purposes:
yaellah1@tauex.tau.ac.il

Contact

CONTACT

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For questions, collaborations, or submission of translations:
yaellah1@tauex.tau.ac.il

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