Context Bias
Definition
A cognitive distortion in which an analyst's conclusions are influenced by prior exposure to investigative assumptions, suspect profiles, or investigator expectations. One of the hardest biases to self-correct and a major source of wrongful attribution.
- Field
- Questioned document authorship analysis
- Type
- Cognitive distortion
- Source of exposure
- Investigative assumptions, suspect profiles, investigator expectations
- Difficulty
- Among the hardest biases to self-correct
Common questions
How does context bias differ from confirmation bias in forensic examination?+
Confirmation bias is the general tendency to favour evidence that supports an existing belief once one is formed. Context bias specifically describes how task-irrelevant information supplied before or during the examination, such as being told who the suspect is, shapes the conclusion the examiner reaches in the first place, before any confirmation-seeking even begins.
What procedural safeguard is typically used to reduce context bias in document examination?+
Linear sequential unmasking, where the examiner reviews the questioned material and forms an initial opinion before being exposed to case-specific information such as a suspect's identity or a target document to compare against, so extraneous context cannot shape the first-pass analysis.
Related terms
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- Questioned Document
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- Register Mixing
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