The document outlines a series of tasks with time durations, including effortful tasks like (a) and (a') that take 8 seconds each, less effortful tasks such as (b), (c), and (e) that take 3 seconds each, a variable effort task (d) that takes between 1.5 to 4 seconds, and inter-trial intervals (ITI) between tasks that last 2 to 4 seconds.

1. Effort task No effort task
8s (a)
3s (b)
3s (c)
1.5 - 4s (d)
3s (e)
8s (a´)
ITI (2 - 4s)
3s (c´)
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