The effect of watching lecture videos at 2× speed on memory retention performance of medical students: An experimental study.

Kıyak Y. S., Budakoğlu I. İ., Masters K., Coşkun Ö.

Medical teacher, vol.45, no.8, pp.913-917, 2023 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 45 Issue: 8
  • Publication Date: 2023
  • Doi Number: 10.1080/0142159x.2023.2189537
  • Journal Name: Medical teacher
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, ASSIA, CINAHL, EBSCO Education Source, Educational research abstracts (ERA), EMBASE, ERIC (Education Resources Information Center), MEDLINE, Public Affairs Index
  • Page Numbers: pp.913-917
  • Keywords: Video speed, playback speed, accelerated playback, lecture videos, medical students
  • Gazi University Affiliated: Yes


Aim: This study aimed to determine how watching lecture videos at 1× and 2× speeds affects memory retention in medical students.

Methods: A posttest-only experimental design was utilized. The participants were 60 Year-1 and Year-2 medical students. The participants were assigned to one of two groups through stratified randomization: Group 1 would watch the video at 1× speed, and Group 2 at 2× speed. Their performance was assessed using a test comprising 20 multiple-choice questions. The test has been applied immediately after watching the video (Immediate test), and, again after one week (Delayed test). Parametric and non-parametric statistical tests were performed.

Results: In the Immediate test, the mean score of the 1× speed group was 11.26 ± 4.06, while 2× speed group's mean score was 10.16 ± 2.46. The difference was not significant t(58) = 1.26, p > .05. In the Delayed test, the mean score of 1× speed group was 9.66 ± 3.94, while 2× speed group's mean score was 8.36 ± 2.80. The difference was not significant t(55) = 1.42, p > .05.

Conclusions: Watching the video lecture at 2× speed did not impair memory retention in medical students. This may help students to save time in their dense curricula.