Cognitive Bias Checklist: Test Assumptions and Improve Judgment

Cognitive biases are predictable tendencies that can shape attention, memory and judgment. They are not signs of low intelligence, and no one becomes completely bias-free. This original CounselorAid checklist helps you notice situations where your reasoning may need a stronger evidence check.

Assessment type: Original research-informed reflection checklist
Items: 28
Recall period: Important decisions during the past three months
Completion time: 8–12 minutes
Evidence status: Informed by judgment and decision-making research; not psychometrically validated

How to respond

Response	Score
Almost never	0
Rarely	1
Sometimes	2
Often	3
Almost always	4

Higher scores indicate more frequent self-reported exposure to that pattern—not a diagnosis or proof that a decision was wrong.

Bias checklist

A. Confirmation and selective evidence

1. I search more actively for information that supports my preferred conclusion.
2. I dismiss contrary evidence faster than supporting evidence.
3. I interpret ambiguous information in a way that protects an existing belief.
4. I ask people who are likely to agree with me rather than seeking a credible challenge.

Confirmation score: Items 1–4 = ____ / 16

B. Anchoring and first-information effects

5. The first number, estimate or explanation strongly shapes my later judgment.
6. I adjust too little after receiving better information.
7. An initial price, deadline or diagnosis remains influential even when its basis is weak.
8. I rarely create an independent estimate before seeing someone else’s answer.

Anchoring score: Items 5–8 = ____ / 16

C. Availability and vividness

9. A recent or emotionally vivid example feels more common than it may be.
10. Memorable stories influence me more than base rates or broader data.
11. I estimate likelihood partly by how easily an example comes to mind.
12. News, social media or personal experience can outweigh less vivid evidence in my judgment.

Availability score: Items 9–12 = ____ / 16

D. Framing and loss sensitivity

13. My preference changes depending on whether the same outcome is described as a gain or a loss.
14. I react more strongly to a possible loss than to an equal possible gain.
15. The wording or emotional tone of a choice affects me before I examine the underlying numbers.
16. I do not always restate a problem in neutral or alternative terms.

Framing score: Items 13–16 = ____ / 16

E. Sunk cost and commitment escalation

17. I continue investing because I have already spent time, money or effort.
18. Stopping can feel like admitting that earlier effort was wasted.
19. I judge whether to continue partly by past costs rather than future value.
20. I find it difficult to revise a public commitment after new evidence appears.

Sunk-cost score: Items 17–20 = ____ / 16

F. Overconfidence and hindsight

21. I feel more certain than the available evidence justifies.
22. I underestimate how much luck or uncertainty affects outcomes.
23. After an event, the result seems more predictable than it did beforehand.
24. I rarely record confidence estimates that could later be checked against results.

Overconfidence score: Items 21–24 = ____ / 16

G. Social proof and authority influence

25. A popular choice feels safer even when I have not reviewed the evidence.
26. Status, confidence or authority can make an argument seem stronger than its reasoning.
27. I hesitate to challenge a group consensus.
28. I sometimes treat repeated claims as more credible simply because they are familiar.

Social-influence score: Items 25–28 = ____ / 16

Interpret each domain

Domain score	Reflection guide
0–3	This pattern was rarely recognised. Consider whether examples were easy to recall.
4–7	Occasional exposure; use a check when the decision is important.
8–11	Regular exposure; build a deliberate countermeasure into your process.
12–16	Frequent self-reported exposure; slow down and seek independent evidence or review.

Do not combine all domains into a “bias score.” Biases arise under different conditions and may pull in opposite directions. The useful question is: Which check would improve this specific decision?

Practical debiasing checks

• Consider the opposite: What evidence would support a different conclusion?
• Use an outside view: What usually happens in similar cases?
• Create an independent estimate: Write your estimate before seeing an anchor.
• Reframe: Describe the same outcome as both a gain and a loss.
• Ignore sunk costs: If you had not already invested, would you start now?
• Use confidence ranges: Replace certainty with probabilities or plausible ranges.
• Invite dissent: Ask a credible person to identify the strongest weakness.
• Keep a decision record: Note evidence, assumptions, confidence and the review date.

Common myths

• Knowing the name of a bias does not reliably remove it.
• Intelligence and expertise do not eliminate biased judgment.
• A biased process can occasionally produce a correct answer, and a careful process can still produce an uncertain outcome.
• Disagreement does not prove that the other person is biased while you are objective.

Contextual next steps

• Use the Decision-Making Style Assessment to review your usual process.
• Review Emotional Reasoning when feelings are being treated as proof.
• Use the CBT Thought Record to examine evidence for a personally distressing interpretation.
• Explore Cognitive Defusion Exercises when thoughts feel fused with identity or certainty.
• Use the OODA Loop when information changes quickly.

Limitations and high-stakes decisions

This checklist relies on self-awareness and memory. People often recognise biases more easily in others than in themselves. It cannot determine whether a belief is true, measure cognitive ability or diagnose a condition.

For medical, legal, financial, safeguarding or scientific decisions, use qualified expertise, transparent evidence standards and independent review. A checklist is a prompt for better process, not a substitute for professional judgment.

Research foundation

• Tversky A, Kahneman D. Judgment under uncertainty: Heuristics and biases. Science. 1974. https://doi.org/10.1126/science.185.4157.1124
• Kahneman D, Tversky A. Prospect theory: An analysis of decision under risk. Econometrica. 1979.
• Arkes HR. Costs and benefits of judgment errors: Implications for debiasing. Psychological Bulletin. 1991.

Important: This is an original CounselorAid reflection checklist. It has not undergone formal psychometric validation and must not be used to diagnose impairment, determine competence or make employment, legal or treatment decisions.