Basic Life Support Training : comparison of Demonstration and Lecture

INTERVENTION: Intervention1: demonstration: In the demonstration group, instructors would demonstrate skills in real‐time without any commentary (stage I), and then again with detailed explanation of each skill (stage II). Control Intervention1: lecture: In the lecture group, an instructor would give the lecture using the official PowerPoint® The lecture would consists of key information about the BLS/AED algorithm, including a step‐by‐step explanation of each skill. The instructor would follow a standardised script. There would be no stage 2 for the lecture group CONDITION: PRIMARY OUTCOME: The primary outcome would be defined as overall pass rate in the two groups, i.e. the percentage of participants with the highest score (13 points).Timepoint: 0, 30 min, 1 hr, 1.5 hr, 2 hr, 2.5 hr SECONDARY OUTCOME: Secondary endpoints would be: A) Chest compression depth, rate, hand positioning and recoil, B) Tidal volume and percentage of successful rescue breathing attempts, C) Time to initiation of BLS and shock delivery, D) Participants self‐perceived skills and ratings of teaching methodsTimepoint: 0, 30 min, 1 hr, 1.5 hr, 2 hr, 2.5 hr INCLUSION CRITERIA: Valid consent , 1st and 2nd year medical student