The main provisions of Henry Murray’s concept of “need-pressure”:
1) Weakening of the need: if the environment prevents the satisfaction of a certain need, tension or frustration increases.
2) Reinforcement of the need: if the environment provides support for the need, the desire to achieve the goal increases.
3) Behavior: the result of the interaction of need and pressure, meaning that the same need can cause different behaviors depending on the nature of external pressure.