Consider the following statements :

The principal characteristics of Lewin's Field theory are

I. Behaviour is a function of the field that exists at the time behaviour occurs

II. Analysis begins with the situation as a whole

III. From the whole situation, the component parts are differentiated

IV. The concrete person in a concrete situation can be represented mathematically

Of the statements :

Whenever undesirable response occurs, it should be reinforced

Which one of the tests mentioned below is a culture fair test

Consider the following statements :

Post traumatic stress disorder has the following characteristics :

I. The individual has been exposed to a traumatic event 

II. The traumatic event is persistently reexperienced

III. Persistent avoidance of stimuli associated with the trauma

IV. Absence of symptoms of increased arousal.

Of the statements :

Carl Rogers used which technique to evaluate self-concept

The hallmark of operant conditioning is