@article{oai:ir.soken.ac.jp:00003848,
 author = {沓掛, 展之 and FUJISAWA, Keiko K and KUTSUKAKE, Nobuyuki and HASEGAWA, Toshikazu},
 issue = {3},
 journal = {International Journal of Behavioral Development, International Journal of Behavioral Development},
 month = {},
 note = {Using social network analysis, we investigated the characteristics of social networks composed of positive relationships (positive network: PN) and negative relationships (negative network: NN) in classrooms of Japanese 3- and 4-year-olds. Analysis of "density" showed that PNs were denser than NNs among 4-year-olds but that this was not the case among 3-year-olds. The difference between the probability of dyads of girls forming cliques, between PNs and NNs, was larger than that for dyads of boys or mixed-sex dyads. Four-year-olds formed cliques more often in PNs than in NNs, compared to 3-year-olds. This study showed that both sex combination of dyads and age affect the quantified properties of social networks among preschoolers.},
 pages = {193--201},
 title = {Social network analyses of positive and negative relationships among Japanese preschool classmates},
 volume = {33},
 year = {2009}
}