Authors found that groups with visual teaching guides improved more than those who had text or written teaching guides.
Differences in learning retention when teaching a manual motor skill with a
visual vs written instructional aide
Alice Cade, MHSc, BSc (Chiro), Matthew Sherson, BSc, BSc (Chiro), Kelly Holt, BSc (Chiro), PhD, Graham Dobson, DC, Katie Pritchard, BSc,
BSc (Chiro), and Heidi Haavik, BSc (Chiro), PhD