[U2Q] A BCBA asks a stay-at-home father to gather data on hi…
A BCBA asks a stay-at-home father to gather data on his son, Kris, who engages in teeth grinding. The father has four other kids at home and reports that he struggles to take continuous frequency or duration data. The BCBA instructs the father to take data every two minutes during a 30-minute period and to mark an “X” if Kris is grinding his teeth when the timer goes off at the end of each interval and a “0” if he is not. Which recording method did Kris’s father use?