causal treatment

Veterinary orthomanual therapy is a causal treatment that aims to correct these misalignments.

The degree of control of human populations required by the design, especially in the random allocation of subjects to experimental and to control groups, and subjecting one but not the other to the causal treatment in the field, is practically impossible.

Since the two groups are as alike in all respects except that one of them, the experimental group, has received the supposedly causal treatment, the new teaching style, then any differences in academic attainment between the two groups must be due either to chance or to the causal factor.