Free cognitive-bias Agent Skill
Use Illusory Truth Effect as a focused cognitive-bias lens. Explain the pattern, check whether it plausibly fits the situation, surface an alternative non-bias explanation, and return a practical counter-check without diagnosing people or claiming causation.
What the agent should do
The Illusory Truth Effect is the tendency for repeated claims to receive higher truth ratings than comparable new claims. The effect is well supported overall, but it is not a rule that repeating any sentence makes people believe it. A 2026 meta-analysis found a reliable average repetition effect with substantial variation across studies, and later preregistered experiments found little or no effect for social-political opinion statements.
Install
Hermes Agent
mkdir -p ~/.hermes/skills/bias-truth-judgment-illusory-truth-effect && curl -fsSL https://cognitive-biases.github.io/agent-skills/bias-truth-judgment-illusory-truth-effect/SKILL.md -o ~/.hermes/skills/bias-truth-judgment-illusory-truth-effect/SKILL.mdOpenClaw
mkdir -p ~/.openclaw/workspace/skills/bias-truth-judgment-illusory-truth-effect && curl -fsSL https://cognitive-biases.github.io/agent-skills/bias-truth-judgment-illusory-truth-effect/SKILL.md -o ~/.openclaw/workspace/skills/bias-truth-judgment-illusory-truth-effect/SKILL.mdOther Agent Skills-compatible tools
Download SKILL.md and put it in the skill directory or import surface supported by your agent.
Boundary
The skill must preserve uncertainty, surface a non-bias explanation and avoid turning a cognitive-bias label into a claim about a person's motives, intelligence or mental health.