Filler words during our day-to-day conversations are okay, because they help us to see that a person hasn’t finished his statement. But during presentations filler words have a bad rep. Since there are no conversations, just a continuous monologue. So too many um and uh create clutter. But eliminating them all is also a bad thing, because filler words make your speech more memorable and help audience understand it better.
1) “Disfluencies signal thee, um, new information” (Arnold et al)
2) “The effect of disfluency on memory for what was said” (Diachek & Brown-Schmidt)