The number in a group ultimately affects its outcome and rate of progress. with increased size. member interaction and relationships decrease. and the gr becomes more leader cen red. Therefore. small of 5 to 10 members may be ideal in working with adolescents groups Gazda (1989) states that the number adolescents he includes in is based on duration of a group and frequency. When both are brief (e.g. 3 he prefers to work with 5 to months), He prefers to work with a group of form 5 to7 If both are longer (e.g. 6 months) , then the group may include from 7 to 10 members. He notes that “as rule. the smaller the group. the more frequently it meets and the longer it meets. the greater the opportunity for intensity of group involvement and growth”(p. 152).