Funniest workshop I went to in grad school was an even split of cognitive scientists (slides), linguists (15 page 10pt handout), and philosophers (reading prepared text verbatim!!!) We were all so scandalized by each others' talk norms, it was a great ice breaker.
There was often way too much on any one slide. You have 5-15 minutes in total, and I found myself frantically scanning each slide to figure out where I was supposed to look and what I was supposed to take away. This is too much cognitive load for the audience.
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