Validity of the visual analogue scale as an instrument to measure self-efficacy in resuscitation skills
Version of Record online: 12 MAR 2008
© Blackwell Publishing Ltd 2008
Volume 42, Issue 5, pages 503–511, May 2008
How to Cite
Turner, N. M., Van De Leemput, A. J., Draaisma, J. M. T., Oosterveld, P. and Ten Cate, O. T. J. (2008), Validity of the visual analogue scale as an instrument to measure self-efficacy in resuscitation skills. Medical Education, 42: 503–511. doi: 10.1111/j.1365-2923.2007.02950.x
- Issue online: 16 MAR 2008
- Version of Record online: 12 MAR 2008
- Received 17 June 2006; editorial comments to authors 9 October 2006, 2 March 2007; accepted for publication 14 August 2007
- clinical competence/*standards;
- education, medical, continuing/*methods;
- education, dental, graduate/*methods;
- validation studies [publication type];
Context Self-efficacy is an important factor in many areas of medical education, including self-assessment and self-directed learning, but has been little studied in resuscitation training, possibly because of the lack of a simple measurement instrument.
Objective We aimed to assess the validity of a visual analogue scale (VAS) linked to a single question as an instrument to measure self-efficacy with respect to resuscitation skills by comparing the VAS with a questionnaire and using known-groups comparisons.
Methods We developed questionnaires to measure self-efficacy for a number of resuscitation tasks and for computer skills. These were compared with VASs linked to a single question per task, using a multi-trait, multi-method matrix. We also used known-groups comparisons of self-efficacy in specific professional groups.
Results There was good correlation between the questionnaires and the VASs for self-efficacy for specific resuscitation tasks. There was a less clear correlation for self-efficacy for paediatric resuscitation overall. There was no correlation between self-efficacy for resuscitation and computer tasks. In specific professional groups, measured self-efficacy accorded with theoretical predictions.
Conclusions A VAS linked to a single question appears to be a valid method of measuring self-efficacy with respect to specific well defined resuscitation tasks, but should be used with caution for multi-faceted tasks.