The study investigated the process and effectiveness of three natural and professional groups who commonly provide help to persons experiencing the important critical life event of marital disruption. Subjects were 42 helpers: 14 mental health professionals, 14 divorce lawyers, and 14 leaders of mutual help groups. Analyses, based on variables derived from coded audiotapes of simulated helping interactions and from ratings of helper effectiveness, indicated many similarities between mental health professionals and mutual help leaders but considerable differences between these two groups and divorce lawyers. Lawyers did more talking overall, showed greater proportions of information giving and closed questions, and were more effective in the legal/financial domain. Additional analyses indicated that all helpers showed fewer information-gathering behaviors and more information- and advice-giving behaviors as the helping interaction progressed.