“…Other researchers found that children with a longer history of shared collaboration play were more successful of pretend play (Doyle, Connolly, & Rivest, 1980;Green, Cillessen, Berthelsen, Irving, & Catherwood, 2003;Howes & Norris, 1993), and free play in groups without external interventions leads to significant longer cooperative play (Gmitrová & Gmitrov, 2003). Quality of cooperative play is related to cognitive and social competence in school (Blair, Denham, Kochanoff, & Whipple, 2004;Gruss, Jackson, Grimson, & Hedgcock, 1998;Hogan & Tudge, 1999;Kontos & Keyes, 1999;Lloyd & Howe, 2003;McClelland & Morrison, 2003;NICHD, 2004;Pianta & Stuhlman, 2004;Spinrad et al, 2004;Wyver & Spence, 1999). Cooperative play therefore, is a major developmental task, as children become part of a classroom and a school community (Fantuzzo et al, 1995;Wentzel & Looney, 2007).…”