Robert J. B. Lehmann

Professor for Psychology & Law

Medical School Berlin

Germany

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Robert J. B. Lehmann is a Professor for Psychology & Law at MSB Medical School Berlin, Germany. His research focuses on child sexual abuse material, online offending behaviors, and risk factors associated with violent recidivism. He has published recent articles analyzing user behavior on darknet forums and investigating empirical models related to deviant sexual behavior.

Articles (10)

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2025

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2024

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2024

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2024

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2024

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2024

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2024

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2024

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2024

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2023

Collaborators (3)

Andreas Mokros

Professor

FernUniversität in Hagen

GERMANY

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Alexander F. Schmidt

Professor (supernumerary)

Johannes Gutenberg Universität Mainz

GERMANY

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Thomas Schäfer

Professor of Quantitative Methods

Health and Medical University Erfurt

GERMANY

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Robert J. B. Lehmann

Research Interests

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Articles (10)

Polling Pedophilic Preferences: Analyzing Responses to User-Generated Member Polls on a Darknet Child Sexual Abuse Forum

Entgegnung: Unterschiedliche Überzeugungen, aber nur eine Wahrheit

Rituelle sexuelle Gewalt

Missing the mark? Identifying child sexual abuse material forum structure and key-players based on public replies and private messaging networks

Testing the Factor Structure and Construct Validity of the German Version of Gray et al.’s (2003) Sexual Fantasy Questionnaire

A review of risk factors for online and mixed child sexual abuse material offending: what is being researched?

The Propensity for Deviant Sexual Behavior in the General Population: An Empirical Examination of the Motivation-Facilitation Model

Standardized risk levels for violent recidivism risk assessed with the HCR-20: an exploration

Why do users continue to contribute to darknet Child Sexual Abuse Material forums? Examining social exchange, social capital, and social learning explanations using digital forensic artifacts

Secondary prevention of the use of online child sexual exploitation material: an initial overview of international efforts

Collaborators (3)

Andreas Mokros

Alexander F. Schmidt

Thomas Schäfer

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