What made it difficult to compare research conducted by behavioural therapists and traditional therapists in the mid-1900s?

Question

Quizplus · Accepted Answer

All of the above are correct. Each research group had their own criteria for including studies, and different criteria were used to evaluate the effectiveness of therapy. Interpretation of results may have been influenced by biases held by each group. These factors make it difficult to directly compare research conducted by behavioural therapists and traditional therapists in the mid-1900s.

What Made It Difficult to Compare Research Conducted by Behavioural