Table 2.

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

<thead></thead>How mentally demanding was the task?

How physically demanding was the task?

How hurried or rushed was the pace of the task?

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

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

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