Which measurement method records the presence or absence of behaviors at precisely specified time intervals?

• A. Momentary Time Sampling
• B. IRT
• C. Magnitude
• D. Naturally Existing Contingency

Answer: (A)

Time sampling methods focus on checking behavior at specific moments. Momentary time sampling records whether the target behavior is occurring exactly at the end of each predefined interval, providing a presence-or-absence snapshot at those precise moments. This is why it’s the best fit for the description in the question: you’re looking for a method that notes if the behavior is happening right at those exact time points across intervals.

This approach differs from whole-interval time sampling (which requires the behavior to occur throughout the entire interval) and partial-interval time sampling (which marks the behavior if it occurs at any point within the interval). It also isn’t about the time between responses (interresponse time), the magnitude or intensity of a response, or contingencies that exist naturally—so those options don’t align with the method described.