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 

Fastest acquistion of behaviour and rapid decrease of behaviour occur when reinforcement is no longer provided in