Which of the following best defines a criterion in the context of a behavioral objective?

In the context of a behavioral objective, defining a criterion is essential for outlining the measurable outcome that indicates success in demonstrating specific behavior. This means that the criterion provides a clear standard against which the performance can be assessed. A behavioral objective typically includes what the individual is expected to achieve, and the criterion sets the expectation for how that achievement will be evaluated, often in terms of accuracy, quantity, or quality.

For example, if a behavior objective states that a participant will "complete a puzzle," the criterion might specify that they do so "within a period of 10 minutes with at least 90% accuracy." This clarity allows for effective measurement and evaluation of progress, helping both the practitioner and the participant understand when the objective has been successfully met.

The other options focus on different aspects of behavioral objectives: one discusses the time frame for task completion, which is important but not the primary definition of a criterion. Another option centers on the conditions of task performance, which are relevant to how the task is completed, while another identifies the specific behavior itself, which is vital but distinct from the criteria that define success. In summary, the correct answer encapsulates the element of measurement needed to evaluate success in achieving behavioral objectives.