Reinforcer pathology <scp>II</scp>: Reward magnitude, reward delay, and demand for alcohol collectively relate to college students' alcohol related problems

Stancato’s team split delay discounting into two parts: how much size matters and how much wait time matters.

They gave 306 college drinkers two short computer tasks. One task raised or lowered reward size. The other raised or lowered wait time.

The students also filled out a drinking-harm survey. The researchers asked: which part of discounting predicts real-world alcohol problems?

Size sensitivity predicted every kind of alcohol trouble: black-outs, missed classes, fights, money woes.

Delay sensitivity predicted only money problems.

In short, caring too little about reward size was the wider red flag than hating long waits.

Miller et al. (2024) now shows a 2-minute "willingness-to-wait" quiz beats the full delay-discounting task. Their result seems to overturn the value of fine-grained delay scores that Stancato highlighted. The twist: Miller dropped the delay task entirely, while Stancato kept it but separated size from wait. Together they tell us the field is moving past single delay numbers toward simpler or more split metrics.

Green et al. (2019) warn that steep discounting is context-bound, not a fixed trait. Stancato’s finer scores support that view: size and delay sensitivities did not track together, so neither is a one-size-fits-all marker.

Torres et al. (2011) proved adjusting-delay schedules give clean data in the lab. Stancato used the same type of schedule, showing the method works outside the rat cage and inside a laptop survey.

When you assess impulsivity, stop relying on one delay score. Ask clients to choose between different reward sizes first, then between different wait times. The size choices will flag more life problems and guide better treatment targets.