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. 2014 Aug 14;2(3):e31. doi: 10.2196/mhealth.3136

Table 2.

Collected measures.

Measure Description
Average response time The elapsed time between the question presentation and the participant selection of one of the answer choices.
Average elapsed time per question The average elapsed time for answering presented question, excluding the recall delay time.
Correct answer score Percentage of questions answered correctly from the first trial.
Posttask questionnaire score Participants’ feedback related to his/her overall satisfaction in fulfilling the required task (between 0 and 7).
NASA-TLXa score The overall NASA-TLX subjective workload score (between 0 and 100).

aNational Aeronautics and Space Administration task load index.