D.5 · Behavior Reduction

Positive and negative punishment

Positive and negative punishment describe adding or removing a consequence that decreases future behavior. Review the examples with the requirement for a documented plan and verified competence.

Task D.5: Apply positive and negative punishment procedures

Useful foundations: C.1: Positive and negative reinforcement

The rule

Punishment is defined by a decrease in future behavior: positive punishment adds a consequence, and negative punishment removes one.

Classify the observed consequence change and its effect on future responding. Using restrictive or punishment-based procedures requires a documented plan and verified competence.

Key terms
Punishment
A consequence decreases the future behavior it follows.
Response cost
Removal of a specified amount of an earned or available reinforcer following a response.

What to look for

DistinctionLook forHow to decide
Future decreaseThe target response becomes less frequent under the contingencyEstablish a decrease in future responding across the relevant observations.
Positive punishmentAn event is added after behaviorAddition plus a future decrease.
Negative punishmentAn event is removed after behaviorRemoval plus a future decrease.

Worked examples

Positive punishment

An added event decreases a response

In a computer-game learning example, pressing an inactive shortcut key produces a brief buzz that was not previously present. Across comparable rounds with this contingency, shortcut-key presses decrease.

Relevant facts

  • The buzz is added after the key press.
  • Later key pressing decreases.

The described pattern supports positive punishment of that key press.

Key press → buzz added → future presses decrease

The buzz is added after the response, and shortcut-key presses decrease across comparable rounds. This identifies positive punishment in the game example.

Negative punishment

A loss decreases a response

In a separate game, pressing a marked penalty key removes one already-earned game point. Across comparable rounds, penalty-key presses decrease.

Relevant facts

  • An earned point is removed after the response.
  • Later penalty-key pressing decreases.

The described pattern supports negative punishment.

Key press → point removed → future presses decrease

An existing point is removed after the response. In extinction, the response stops earning its previously available point consequence.

What changes the answer?

Keep a consequence involving removal; change its effect and relation.

  • Something is removed after a response.

An earned point is removed and the response decreases.

Negative punishment.

Removal weakens the future response.

A task is removed after a request and requesting increases.

Negative reinforcement.

Removal strengthens the future response.

Removal tells you “negative”; the future effect distinguishes punishment from reinforcement.

Remember

  • Added or removed; increased or decreased: check both.
  • Use procedures within the documented plan and your verified competence.
Sources for this topic

Reviewed 2026-09-30 · D.5 version 3.