LaFreniere, Strayer, and Gauthier (1984) conducted a three-year-long study observing fifteen peer groups between the ages of 1 to 6 years old, 98 boys and 93 girls.
LaFreniere、Strayer和Gauthier實行一個長達三年的研究，觀察十五個年紀介於1至6歲的群體，其中有98位男孩與93位女孩。