If about half the people receiving some type of therapy for depression show improvement within six months,why does that fact probably overstate the effectiveness of the therapy?

Question

If about half the people receiving some type of therapy for depression show improvement within six months,why does that fact probably overstate the effectiveness of the therapy?​

Quizplus · Accepted Answer

Many people with depression will naturally improve within six months even without any type of therapy, so the fact that half of those who receive therapy improve within that timeframe likely overstates the effectiveness of the therapy. Additionally, A and B are not necessarily true, as people across the spectrum of depression may seek treatment, and six months may not be too long to wait for improvement depending on the severity of the depression and the type of therapy being used.

If About Half the People Receiving Some Type of Therapy