Glossary · 6 · Warnings and risk communication
Risk perception
Also known as: Perceived risk, Subjective risk
German: Risikowahrnehmung
In psychology and risk communication, risk perception is the subjective judgment people make about the likelihood and severity of harm from a hazard or activity; in the psychometric paradigm (Paul Slovic, 1987) it is shaped by qualitative characteristics such as dread and how unknown a risk is, not only by statistical estimates.
- Applied cognitive psychology
- Warnings and risk communication
In one sentence
Risk perception is people's subjective judgment of how likely and severe harm is, shaped by dread, familiarity and control (Slovic, 1987).
Example
Maintenance staff who have cleared jams by hand for years rate the risk as low because nothing has happened to them. The instructions therefore describe a concrete accident mechanism and its consequence instead of a general “risk of injury”.
Rests on
- Heuristics and biases: availability and affect shape judgments of risk; familiar, voluntary, controllable activities feel safer than their statistics suggest.
- Normalization of deviance: repeated unsafe practice without harm lowers perceived risk.
How it applies
- Why readers underestimate familiar hazards: In Slovic's psychometric studies, risks rated as dreaded and unknown were perceived as more threatening; familiar, controllable risks were rated lower. In machinery use, routine tasks such as cleaning, jam clearing or setup are where perceived and assessed risk diverge most.
- Safety messages: Name the specific hazard, the mechanism and the consequence in concrete terms; this supports the beliefs stage of the C-HIP model. A warning message that only says "Danger" gives readers nothing to update their judgment.
- Residual risk: Information on residual risk should state what remains and why, so that users do not infer from the presence of guards that no risk remains.
Risk perception vs. risk assessment
Risk perception is the subjective judgment of users and the public. The risk assessment is the manufacturer's systematic process of identifying hazards, estimating and evaluating risks and reducing them. Documentation addresses risk perception; it never substitutes users' judgment for the risk assessment.
Limits
- The psychometric findings describe group averages across many hazards; individuals and cultures differ.
- Changing perceived risk does not reduce the risk itself; persuasion in documentation never replaces protective measures.