Measurement and instrument
HEART
The instruments used in the research were demographic information questionnaire, Kolb learning style inventory and BLS checklist with 18 items. This researcher-made checklist was prepared after reviewing samples of similar foreign and domestic checklists and based on the latest changes in the clinical guidelines of the American Heart Association and European Resuscitation Council (2020–2021). Scoring consisted of not doing at all (zero) and doing completely and correctly (one), and the score range considered for this observation checklist was from 0 to 14 with four items for CPR meter 2 laerdal (including: accuracy percentage of chest compression depth, accuracy percentage of chest compression rate, accuracy percentage of complete chest recoil and accuracy percentage of chest compression fraction) were evaluated to assess the performed chest compression. Content validity was assessed for tool validity so that the study tool was provided to 9 faculty members of Mashhad School of Nursing and Midwifery and it was confirmed by coefficient of variation ratio (CVR): 0.99 and content validity index (CVI): 1. The reliability of the basic life support skill checklist of rescuers was approved using Richardson’s Koder method with a coefficient of 0.804. The reliability of the Kolb Learning Style Inventory was confirmed with a Cronbach’s alpha coefficient of 0.92.