Fig. 1

CONSORT inclusion flowchart of screening, randomisation and participation. Legend: 167 course participants were assessed for eligibility. Eleven course participants were excluded before randomisation, as they did not have time to participate in the test. The remaining 156 participants underwent randomisation and 52 were allocated to each intervention group. Two participants had to leave before the test after the randomisation and one participant in the video group saw the video twice and was erroneously not tested. A total of 153 participants completed the test and were included in the analyses