Consider the following statements :
I. RET uses 40 or 50 regular techniques
II. RET uses irregular techniques like body massage
III. RET uses imagery
IV. RET uses relaxation.
Of the statements :
The phenomenon that may operate when subjects are selected on the basis of extremely high or extremely low pre-test scores is called
Older adults with transitional developmental concerns get little assistance in which of the following services
Statistical test of a non-directional hypothesis is
The best technique for selecting a representative sample is