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Table 2 Formal usability

From: Duke Surgery Patient Safety: an open-source application for anonymous reporting of adverse and near-miss surgical events

DSPS speed is excellent. Strongly disagree 0/12
  Disagree 0/12
  Neutral 0/12
  Agree 1/12
  Strongly agree 11/12
DSPS is extremely easy to learn Strongly disagree 0/12
  Disagree 0/12
  Neutral 1/12
  Agree 1/12
  Strongly agree 10/12
DSPS is extremely easy to use Strongly disagree 0/12
  Disagree 0/12
  Neutral 0/12
  Agree 4/12
  Strongly agree 8/12
It is very easy to understand all functionality available within DSPS (e.g., download files, upload files, etc) Strongly disagree 0/12
  Disagree 0/12
  Neutral 1/12
  Agree 1/12
  Strongly agree 10/12
The navigation in DSPS is highly intuitive Strongly disagree 0/12
  Disagree 0/12
  Neutral 0/12
  Agree 0/12
  Strongly agree 12/12