What is meant by 'duration' in behavioral assessment?

In behavioral assessment, 'duration' specifically refers to the time frame during which a behavior occurs. It measures how long a particular behavior lasts from its onset to its cessation. This is crucial in understanding the intensity and impact of the behavior, as it provides insights into the frequency and persistence of the action. For example, if a child engages in an aggressive act, knowing the duration can help assess the severity of the behavior and inform interventions aimed at modification.

The other choices focus on different aspects of behavior measurement: one deals with frequency, another with prediction, and the last with the length of teaching sessions, which are important in their own right but do not accurately define 'duration' in the context of behavioral assessment.