Abstract
The role of social networking mobile applications such as WhatsApp in enhancing second language vocabulary learning among English language learners continues to be a subject of interest for many scholars. The current study aimed at examining medical English vocabulary learning among undergraduate students using WhatsApp compared to learning vocabulary via Blackboard platform during the Covid-19 pandemic. To this end, 108 medical students (51 males, 57 females) enrolled in a first semester English for a specific English course participated in the study. A quasi-experimental design was adopted for two groups. Fifty-three students were assigned to the WhatsApp group and 55 students were assigned to the Blackboard group. Data were collected using pretest-posttest design. Results of t-test scores revealed no significant difference between the WhatsApp and Blackboard groups on a vocabulary test. Results of survey that gauged students' perception of the use of WhatsApp as a platform for learning new vocabulary showed positive perceptions since participants thought that WhatsApp enhanced their learning experience.