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Wardle, Georgina A. and Hunter, Simon C. and Warden, David (2011) Prosocial and antisocial children's perceptions of peers' motives for prosocial behaviours. British Journal of Developmental Psychology, 29 (3). pp. 396-408.
Wardle, Georgina A. (2007) Children's perceptions of peer prosocial behaviours and motives: why are children nice to each other? PhD thesis, University Of Strathclyde.