Judgment and biases

Biases are tendencies in judgment, not proof that a person always reasons badly. Use examples to identify the specific information-processing pattern.

Lesson 2 of 33 parts Practice Flashcards

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Confirmation bias and Availability heuristic

Objective: Explain confirmation bias and availability heuristic, distinguish their meanings, and apply them to a described case.

Confirmation bias: Confirmation bias favors seeking or interpreting information supporting existing beliefs. Availability heuristic: Availability uses ease of recalling examples to judge frequency or likelihood. Thinking uses representations and strategies that can be efficient yet fallible. A heuristic is not always wrong, and a named bias is a tendency rather than a diagnosis of irrationality. Judgment should be compared with a specified standard and relevant information. Language supports and can influence thought without fixing every possible idea. Distinguish a demonstrated task effect from an unrestricted claim about all human reasoning. Application: A reader examines only evidence agreeing with an initial view. This most directly illustrates confirmation bias. A vivid recent story dominates a probability judgment. This most directly illustrates availability heuristic.

Worked examples

Try itOriginal teaching scenario: A reader examines only evidence agreeing with an initial view. Which idea from this section does it most directly illustrate?Show answer

Step 1 — Read the observation: A reader examines only evidence agreeing with an initial view. Step 2 — Recall the relevant idea: Confirmation bias favors seeking or interpreting information supporting existing beliefs. Step 3 — Connect the observation to the idea: The scenario is an illustration of confirmation bias. Step 4 — Check the limit: This short scenario illustrates the concept; it does not establish every detail or exclude every other influence in a real situation.

Try itOriginal teaching scenario: A vivid recent story dominates a probability judgment. Which idea from this section does it most directly illustrate?Show answer

Step 1 — Read the observation: A vivid recent story dominates a probability judgment. Step 2 — Recall the relevant idea: Availability uses ease of recalling examples to judge frequency or likelihood. Step 3 — Connect the observation to the idea: The scenario is an illustration of availability heuristic. Step 4 — Check the limit: This short scenario illustrates the concept; it does not establish every detail or exclude every other influence in a real situation.

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Confirmation bias and Availability heuristic

Objective: Explain confirmation bias and availability heuristic, distinguish their meanings, and apply them to a described case.

Worked examples

Try itOriginal teaching scenario: A reader examines only evidence agreeing with an initial view. Which idea from this section does it most directly illustrate?Show answer

Try itOriginal teaching scenario: A vivid recent story dominates a probability judgment. Which idea from this section does it most directly illustrate?Show answer

Anchoring and Framing effect

Objective: Explain anchoring and framing effect, distinguish their meanings, and apply them to a described case.

Anchoring: Anchoring occurs when an initial value influences a later estimate. Framing effect: Framing changes decisions through different presentations of equivalent information. Thinking uses representations and strategies that can be efficient yet fallible. A heuristic is not always wrong, and a named bias is a tendency rather than a diagnosis of irrationality. Judgment should be compared with a specified standard and relevant information. Language supports and can influence thought without fixing every possible idea. Distinguish a demonstrated task effect from an unrestricted claim about all human reasoning. Application: An arbitrary first number shifts subsequent judgments. This most directly illustrates anchoring. Equivalent outcomes are described as gains versus losses. This most directly illustrates framing effect.

Worked examples

Try itOriginal teaching scenario: An arbitrary first number shifts subsequent judgments. Which idea from this section does it most directly illustrate?Show answer

Step 1 — Read the observation: An arbitrary first number shifts subsequent judgments. Step 2 — Recall the relevant idea: Anchoring occurs when an initial value influences a later estimate. Step 3 — Connect the observation to the idea: The scenario is an illustration of anchoring. Step 4 — Check the limit: This short scenario illustrates the concept; it does not establish every detail or exclude every other influence in a real situation.

Try itOriginal teaching scenario: Equivalent outcomes are described as gains versus losses. Which idea from this section does it most directly illustrate?Show answer

Step 1 — Read the observation: Equivalent outcomes are described as gains versus losses. Step 2 — Recall the relevant idea: Framing changes decisions through different presentations of equivalent information. Step 3 — Connect the observation to the idea: The scenario is an illustration of framing effect. Step 4 — Check the limit: This short scenario illustrates the concept; it does not establish every detail or exclude every other influence in a real situation.

Overconfidence and Base-rate neglect

Objective: Explain overconfidence and base-rate neglect, distinguish their meanings, and apply them to a described case.

Overconfidence: Overconfidence is confidence exceeding warranted accuracy or evidence. Base-rate neglect: Base-rate neglect underweights relevant prior frequency information. Thinking uses representations and strategies that can be efficient yet fallible. A heuristic is not always wrong, and a named bias is a tendency rather than a diagnosis of irrationality. Judgment should be compared with a specified standard and relevant information. Language supports and can influence thought without fixing every possible idea. Distinguish a demonstrated task effect from an unrestricted claim about all human reasoning. Application: A person expresses certainty despite poor prediction performance. This most directly illustrates overconfidence. A judgment emphasizes a vivid description over prevalence data. This most directly illustrates base-rate neglect.

Worked examples

Try itOriginal teaching scenario: A person expresses certainty despite poor prediction performance. Which idea from this section does it most directly illustrate?Show answer

Step 1 — Read the observation: A person expresses certainty despite poor prediction performance. Step 2 — Recall the relevant idea: Overconfidence is confidence exceeding warranted accuracy or evidence. Step 3 — Connect the observation to the idea: The scenario is an illustration of overconfidence. Step 4 — Check the limit: This short scenario illustrates the concept; it does not establish every detail or exclude every other influence in a real situation.

Try itOriginal teaching scenario: A judgment emphasizes a vivid description over prevalence data. Which idea from this section does it most directly illustrate?Show answer

Step 1 — Read the observation: A judgment emphasizes a vivid description over prevalence data. Step 2 — Recall the relevant idea: Base-rate neglect underweights relevant prior frequency information. Step 3 — Connect the observation to the idea: The scenario is an illustration of base-rate neglect. Step 4 — Check the limit: This short scenario illustrates the concept; it does not establish every detail or exclude every other influence in a real situation.

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