Current perspectives on the biological study of play: Signs of progress
Graham, K.L., Burghardt, G.M.
· 2010
★ NIFPlay Rating: 9
Rating Scale
10 Rigorous play-specific science
6–9 General biological science
5 Sound play research (uncontrolled)
1–4 Less rigorous / indirect
0 Indirect but high value
Burghardt's review of scientific advances in the biology of play, assessing progress in understanding play's functions, mechanisms, and evolution across species.
