Effects of ambient lighting on performance and learning of underwater helicopter escape sequences during simulation training

Abstract

This project aimed to evaluate effects of ambient lighting during practice and performance of dry, simulated helicopter escape sequences. Participants were randomized to one of the following groups to practice a standard helicopter underwater escape sequence: Light (with room lights on), Dark (with room lights off), or Graduated (in the light for the first half and then in the dark for the second half of the trials). Following practice, participants had a minimum of thirty minutes break, followed by retention testing in the dark and then in the light. Dependent measures included accuracy, movement time, state anxiety index, breathing rate, and heart rate variability. Results indicated that participants performed more accurately during the dark retention trial than during the light retention trial. This could be due to increased arousal elicited by performance in the dark or, alternatively, may suggest that performance of helicopter escape sequences is not visually mediated. Anxiety level did not differ between conditions. Based on findings, it appears that training in the light is suitable for potential performance in the dark.