Ego Depletion

From Finkel & Campbell, 2001, JPSP, used as a manipulation check :

At the end of the session, participants completed a five-item instrument assessing how effortful it had been to comply with the instructions while watching the film segment. […] We scored their responses on a scale ranging from 0 (do not agree at all) to 8 (agree completely).

The items:

1. I exerted a lot of effort while watching the film
2. I had to concentrate on the instructions while watching the film
3. I felt emotionally tired after watching the film