A few studies have found that Treatment A for anxiety,a manualized treatment,is not only superior to a placebo treatment,but produces outcomes at least as good as an existing well-regarded,widely used treatment for anxiety.These studies have been conducted by different investigators,and the client samples have been specified clearly.On the basis of this information,we would describe Treatment A as

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Treatment A has been found to be superior to a placebo treatment and at least as good as an existing well-regarded treatment for anxiety. These studies have been conducted by different investigators and the client samples have been specified clearly, suggesting that Treatment A is well-established.

A Few Studies Have Found That Treatment a for Anxiety,a