Michael bites his wrist at a very high rate causing signific…

Michael bites his wrist at a very high rate causing significant tissue damage.  Using various assessment techniques his behavior analyst concludes that Michael bites himself at the highest rate whenever he is alone and that he likes the way it feels.  Michael’s biting his wrist behavior is most likely maintained by:

Lee loves his new on-demand cable TV service, which is desig…

Lee loves his new on-demand cable TV service, which is designed to let him view anything he wants at any time of the day.  Most of the time it works without trouble.  He makes a selection by highlighting a title with his remote and presses “enter”, and the selected movie or TV show plays immediately.  However, Lee finds that on some occasions, his selections do not play.  Making a selection by highlighting a title and pressing play is reinforced according to a(n) ____________ schedule.