If "classical" schedules are being presented,
we wonder if the DRL schedule has
not earned the right to mention? If the aim is
to break away from the restrictive traditional
classification of schedules into Fl, VI, FR, and
VR, and indicate instead the existence of infinite
possibilities of stating rules relating the
response-reinforcement contingency, sections
7.2 and 7.3 do not come close to suggesting
DRO schedules, DRH schedules, limited-hold
contingencies, differential reinforcement of interresponse
times, etc., nor even hint at the
possibilities of subtle behavioral control that
led Reynolds (1968, p. 60) to write: "Schedules
are the mainsprings of behavioral control, and
thus the study of schedules is central to the
study of behavior.