Back to Resource Library Dominance and age-related changes in the play fighting of intact and post-weaning castrated male rats (Rattus norvegicus) Smith, L.K., Field, E.F., Forgie, M.L., Pellis, S.M. · 1998 ★ 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 Controlled study examining how castration and dominance status affect the developmental trajectory of play fighting in male rats, clarifying hormonal and social influences. View Resource
