5. Related studies
Oral presentations have been employed in language classrooms around the world
for many years (Siriphotchanakorn. 2005). However, few studies have examined the effects
of oral presentations. Among them, Ho (1995) taught 80 computer science students by
using oral presentations in the course, I.S. 205 Business Communication. The aim was to
help students develop speaking skills and give an effective presentation. Therefore, she
added one oral presentation to the original two requiring students to now give three oral
presentations; the first and the third 5-8 minutes individually; the second was a 20-minute
group presentation. She chose to compare the first and the third because of their similarity
(the students were allowed to choose their own topics for the first talk and the third).
The result showed that students’ performance did not improve much from the first
talk to the third talk. She gave two possible reasons: first, the third talk was at the end of the
second semester when they were preparing for their examinations and finishing work in