- yawn --

'Yawning may keep us 'on the ball'

IVs? DVs? (my answers below)





















At the vary least:
IV=experimental condition; levels = breathed nose, breathed mouth, ice pack, room-temp pack, hot pack
watching a video of people yawning was a control - all subjects watched this
DV = # of yawns (which had to have some type of operational definition - opened mouth wide, made non-verbal sound; and I'd have two raters and check to see if there was inter-rater reliability)

I suspect they did this:
IV1= video: people yawning/people not yawning
IV2= breathed: nose/mouth
IV3 = pack: hot/room/cold

same DV