The rehabilitation therapist wants to determine if the sensory integration sessions are helping to reduce Ed’s hand-slapping. What is the BEST method for recording momentary time-sampling data?

The rehabilitation therapist wants to determine if the sensory integration sessions are helping to reduce Ed’s hand-slapping. What is the BEST method for recording momentary time-sampling data?
A .  Fifteen-minute observation periods are divided into 3-minute intervals. Staff then record whether or not hand-slapping is occurring at the end of each 3-minute interval.
B .  Twenty-minute observation periods are divided into 10-minute intervals. Staff then record whether or not hand-slapping is occurring during each 10-minute interval.
C .  Thirty-minute observation periods are divided into 2-minute intervals. Staff then record whether or not hand-slapping occurs at any moment during each 2-minute interval.
D .  One-hour observation periods are divided into 10-minute intervals. Staff then record whether or not hand-slapping occurs at all during each 10-minute interval.

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Answer: A