A procedure used to control both the placebo effect and the experimenter effect in drug experiments is the . . . . . . . .

Which of the following measures may be adopted for bringing a change in the behaviour and complete modification of the client's philosophy of life?

A. Psychoanalysis

B. Guidance and counselling

C. Psychotherapies

D. All of the above

Psychologists face an interesting problem not shared by physicists and chemists. Human subjects are very sensitive to hints from an experimenter about what is expected of them, is called . . . . . . . .

A. Placebo effect

B. Environmental effect

C. Experimenter effect

D. None of these

Consider the following statements
1. Field experiments and quasi experiments are conducted in natural setting
2. Field experiments and quasi experiments study real life problems
3. Field experiments study imaginary problems
Select the correct answer from the options given below:

A. 1, 2 and 3

B. 1 and 2

C. 2 and 3

D. Only 1

Situational variables include

A. Environmental variables

B. Organismic variables

C. Sequential variables

D. All of the above