A 1977 meta-analysis by Smith and Glass concluded that the average person receiving psychotherapy showed more positive outcomes than 75 percent of non-treated individuals. Modern meta-analyses of the effectiveness of therapy have generated percentages that are _____________.

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Modern meta-analyses have generally found results that are roughly equivalent to those found by Smith and Glass in 1977, indicating that the average person receiving psychotherapy shows more positive outcomes than a significant majority of those not receiving treatment.

A 1977 Meta-Analysis by Smith and Glass Concluded That the Average