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#1. A paraprofessional is collecting data using Planned Activity Check (PLACHECK) on a group of students in a classroom. The observation period is divided into 20-second intervals. According to the principles of PLACHECK, at what point during each interval should the paraprofessional observe and record whether the target behavior is occurring for the group?

Throughout the entire 20-second interval, recording if the behavior occurs at any time.

At the very beginning of each 20-second interval.

At the exact moment the 20-second interval ends.

For 5 seconds at the midpoint of each 20-second interval.

The text specifies that for PLACHECK which is a type of momentary time sampling the observer should be looking at the behavior at 20 seconds each time right the end of each interval This means data collection occurs only at the precise moment the interval concludes not throughout at the beginning or at the midpoint of the interval If the behavior is occurring at that exact moment it is recorded If not it is not recorded for that interval This is a defining characteristic of momentary time sampling methods like PLACHECK

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