Bos intervention specifically targets the interresponse time IRT which is the duration between the end of one response and the beginning of the next By requiring employees to wait at least one hour between questions he is directly applying a contingency based on IRT to reduce the overall rate of questionasking This is a hallmark of Differential Reinforcement of Low Rates DRL DRL procedures reinforce a behavior when it occurs at a low but nonzero rate There are several forms of DRL including spacedresponding DRL where a response is reinforced only if it occurs after a specified IRT as in this scenario and fullsession DRL where reinforcement is delivered if the total number of responses during a session is at or below a set criterion DRD Differential Reinforcement of Diminishing Rates is similar in aiming to reduce behavior but it typically reinforces when the total number of responses during an interval or session is less than or equal to a gradually decreasing criterion often not explicitly using IRT as the primary contingency DRO Differential Reinforcement of Other Behavior involves reinforcing the absence of a specific behavior for a predetermined period which is not what Bo is doing here as he allows for some questions Time Out from Reinforcement is a punishment procedure involving the temporary removal of access to reinforcement which is not being used as Bo is attempting to reinforce delayed questioning rather than punish immediate questions