Research shows that full sentence headlines on PowerPoint slides improve listeners' knowledge and comprehension when compared to using sentence fragments or phrases.
a) Full sentence headlines on PowerPoint slides have shown to be less effective than using sentence fragments or phrases.
b) There is no significant difference in the impact on listeners' knowledge and comprehension between full sentence headlines and sentence fragments/phrases on PowerPoint slides.
c) Research indicates that using sentence fragments or phrases on PowerPoint slides yields better listener comprehension compared to full sentence headlines.
d) Studies suggest that full sentence headlines on PowerPoint slides enhance listeners' knowledge and comprehension in comparison to using sentence fragments or phrases.