Relative and absolute density of reinforcement as factors influencing the peak shift

af Wheatley, Kimbal L., Thomas, David R.
Udgivet 1974

Choice performance in several concurrent key-peck treadle-press reinforcement schedules

af Wheatley, Kimbal L., Engberg, Larry A.
Udgivet 1978

Matching to relative reinforcement frequency in multiple schedules with a short component duration

af Shimp, Charles P., Wheatley, Kimbal L.
Udgivet 1971