“…Since the 1970s, we have witnessed a marked proliferation in various kinds of self-help groups in western countries, as well as in Israel (Bargal, 1992;Gidron, Chesler, & Chesney, 1991;Katz, 1981;Katz et al, 1992;Tirosh Ben-Ari, 1995). Although this trend has generated considerable research interest in recent years (Katz, 1981;Kurtz, 1997;Powell, 1994), there is still a lack of outcome studies using controlled designs (Katz, 1981;Kurtz, 1990;Lieberman & Borman, 1979).…”