Lier Score Calculator

Calculate the percentage of false or lie-keyed answers in a questionnaire or behavioral scale.

869.1K uses Updated · 2026-05-25 Runs locally · zero upload
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How to Use the Lier Score Calculator

Paste item-level responses such as T, F, true, false, yes, or no, and the calculator will count false-keyed answers. If no response list is entered, provide the total item count and the false-answer count manually.

Read the final percentage as the share of answers marked false, negative, or inconsistent. Higher values suggest more validity concerns, depending on the scale design.

Formula and Method - Lier Score Calculator

Lier Score = (false answer count ÷ total question count) × 100

The score normalizes a count of false-keyed answers into a percentage, which makes questionnaires of different lengths easier to compare. Parsed item responses take priority over the manual count.

Use Cases for the Lier Score Calculator

  • Screening validity or lie-keyed items before interpreting a questionnaire.
  • Comparing response quality across forms with different item counts.
  • Teaching how a raw count becomes a standardized percentage score.

Frequently asked questions about Lier Score Calculator

Which responses count as false?

F, false, 0, no, n, lie, l, and the Chinese terms for false/no are counted as false-keyed answers.

Why does pasted text override the manual count?

Item-level responses are the more direct source, so the calculator uses them first.

Does this diagnose deception?

No. It is a scoring aid whose interpretation depends on the questionnaire manual.