momentary time sampling
A data collection method where behavior is recorded as occurring or not occurring at specific predetermined moments.
Full Definition
Momentary time sampling is an interval recording technique where the observer records whether a target behavior is occurring at the exact moment of observation, typically at the end of predetermined intervals. This method provides an estimate of the percentage of time a behavior occurs and is particularly useful for continuous behaviors or when constant observation is not feasible. The technique requires careful operational definition of behaviors and consistent timing of observations. It tends to underestimate behavior duration compared to continuous recording but provides a practical approximation for clinical and educational settings.
Usage
Usage note: Often abbreviated as MTS in clinical documentation.
In Context
- "The aide collected data using momentary time sampling, checking every 30 seconds to see if the student was on-task." — Data collection protocol
- "Momentary time sampling revealed that stereotypic behavior occurred during 23% of observed intervals." — Assessment report