What distinguishes continuous measurement from discontinuous measurement?

• A. Continuous measures record every instance or continuous data; discontinuous measures sample at intervals
• B. Continuous measures rely on interviews rather than observation
• C. Discontinuous measures record every instance
• D. Continuous measures record every instance or continuous data; discontinuous measures sample at intervals

Answer: (D)

Continuous measurement captures every instance of the target behavior or a continuous dimension (like total duration, latency, or rate) as it occurs, providing data that reflect each moment of the behavior. Discontinuous measurement uses sampling at predefined intervals or moments, so data are collected only during those times and some occurrences may be missed. This distinction matters because continuous measurement gives a precise, complete picture of how often or how long a behavior happens, but it takes more effort; discontinuous measurement reduces observer workload by sampling, at the cost of some accuracy. The best description states that continuous measures record every instance or continuous data, while discontinuous measures sample at intervals, which directly captures the difference between the two approaches.