Finally an excuse for my bad black/whiteboardpersonship!
Apparently, retention of information is improved if the way it is presented is difficult to read:
… if something is hard to see or hear, it feels disfluent … We’d found that disfluency led people to think harder about things.
Aside: the lead author, Connor Diemand-Yauman, either has a surprisingly non-unique name, or partakes of reality tv-show contestantship while majoring in psychology.
I went to college with him, and yes, he’s both a psych major and a reality-TV contestant.