Table 1.

Operational Definitions of Problems of Commission and Omission

Problems of commission
Vocal disruption	Saying “no” to an adult instruction, yelling or screaming while indoors, swearing, rudeness, name calling
Motor disruption	Throwing items, tearing books, swiping items off tables, kicking items, knocking over structures, grabbing materials from others, running away, standing on furniture, sitting on tables, opening classroom doors
Aggression	Kicking, hitting, pinching, shoving, spitting, forceful grabbing, scratching, biting, throwing things toward another person, spitting
Problems of omission
Approximation	Engaging in an approximation of the desired response
No response	Ignoring adults or other children, noncompliance, not saying thank you upon receipt of requested materials