Table 1.

Experimental overview. The Sessions and Trials column shows the scheduled numbers, but monkeys worked at their own pace, and so they ultimately determine the total trials based on how often they finished all trials within sessions.

Experiment	Conditions	Trials | Condition	Sessions (Trials)	Species	Primary Research Questions
1	Signaled-Outcomes	120-trial Sessions	40 (120)	Rhesus Monkeys	(1) Is the failure to find a signal effect in capuchin monkeys due to their inattention to the delay signals?
	Unsignaled-Outcomes	120-trial Sessions		Capuchin Monkeys
2	Signaled-Hard	150-trial Phases	13 (600)	Capuchin Monkeys	(1) Will the signaling effect be present if the alternative to the risky option is a task where reward depends upon performance? (2) Will monkeys avoid truncating delays on the unsignaled task following an incorrect response?
	Signaled-Easy	150-trial Phases
	Unsignaled-Hard	150-trial Phases
	Unsignaled-Easy	150-trial Phases
3	Go-Stage: Signaled-Work	150-trial Phases	10 (600)	Capuchin Monkeys	(1) Will the monkeys selectively truncate delays on unsignaled judgment tasks when their performance determines reward?
	Go-Stage: Signaled-Yoked	150-trial Phases
	Go-Stage: Unsignaled-Work	150-trial Phases
	Go-Stage: Unsignaled-Yoked	150-trial Phases
	No-Stage: Signaled-Work	150-trial Phases	10 (600)		(2) Will the monkeys continue to display the signaling effect on trials where they cannot truncate the delay?
	No-Stage: Signaled-Yoked	150-trial Phases
	No-Stage: Unsignaled-Work	150-trial Phases
	No-Stage: Unsignaled-Yoked	150-trial Phases