Tasks such as the 5-Choice Serial Reaction Time Test (5CSRTT)60 and Differential Reinforcement of Low Rates of Responding (DRL) schedules61 have been used to measure the ability to withhold behavior while waiting for the opportunity to obtain a reward. The 5CSRTT, commonly considered the rodent analog of a human Continuous Performance Task, was designed to measure attentional ability by requiring rodents to make spatially-congruent responses following presentation of a brief visual stimulus. However, responses made at inappropriate times, most notably premature responses made during the inter-trial interval, have been proposed to index difficulty with waiting, a form of impulsive responding.60
