Task Load Index Scale

Figure 8.6

NASA Task Load Index
Hart and Staveland’s NASA Task Load Index (TLX) method assesses
work load on five 7-point scales. Increments of high, medium and low
estimates for each point result in 21 gradations on the scales.

Name

Mental Demand

Very Low

Physical Demand

Very Low

Temporal Demand

Very Low

Performance

Perfect

Effort

Very Low

Frustration

Very Low

Task

Date

How mentally demanding was the task?

Very High

How physically demanding was the task?

Very High
How hurried or rushed was the pace of the task?

Very High
How successful were you in accomplishing what
you were asked to do?

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

Very High
How insecure, discouraged, irritated, stressed,
and annoyed wereyou?

Very High