NASA-TLX Validated

NASA Task Load Index (Raw TLX)

Six dimensions of perceived workload rated on 0–100 scales. Scored as Raw TLX, the unweighted mean.

6 items About 2 min 0–100 rating

Product or system Participant ID

Lower ratings mean less workload. Note that the Performance scale runs from Perfect to Failure.

Move each slider to reflect the task you just completed. Every dimension needs a rating.

1Mental Demand How mentally demanding was the task?

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Very lowVery high

2Physical Demand How physically demanding was the task?

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Very lowVery high

3Temporal Demand How hurried or rushed was the pace of the task?

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Very lowVery high

4Performance How successful were you in accomplishing what you were asked to do?

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PerfectFailure

5Effort How hard did you have to work to accomplish your level of performance?

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Very lowVery high

6Frustration How insecure, discouraged, irritated, stressed, and annoyed were you?

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Very lowVery high

0 of 6 answered

Score many respondents at once

Use one row per respondent and one column per item (Q1…Q6), with raw responses from 0 to 100. An optional first column called id labels each row. Comma, semicolon and tab separated files all work.

Drop a CSV file here or click to choose one

Or paste data

NASA Task Load Index (Raw TLX)

Score many respondents at once

When to use it

How it is scored

NASA Task Load Index (Raw TLX)

Score many respondents at once

When to use it

How it is scored

Related scales

Single Ease Question Validated

After-Scenario Questionnaire Validated