What is the definition or description of: behavior modification?

A Type of Therapy: Behavior modification, a type of psychotherapy is the use of demonstrated behavior change techniques to increase or decrease the frequency of behaviors, such as altering an individual's behaviors and reactions to stimuli through positive and negative reinforcement of adaptive behavior and/or the reduction of behavior through its extinction, punishment and/or satiation. Source wikipedia.

Behavior Modificatio: Is the use of empirically demonstrated behavior change techniques to increase or decrease frequency of behaviors, such as altering one's behaviors & reactions to stimuli through positive & negative reinforcement of adaptive behavior &/or the reduction of behavior through its extinction, punishment &/or satiation.

Altering patterns: Behavior patterns are responses to perceived rewards and punishments. To modify behavior we seek to shift the reward/punishment system, so desired behavior is rewarded and undesirable behavior is negated or punished in some way. The most successful behavior mod rewards desired behavior and ignores undesirable behavior. Punishment may be used if the behavior to be adjusted is particularly egregious.