I completed 1 ad hoc manuscript review for Acta Psychologica; I completed 1 ad hoc review for IEEE Human-Machine Systems; I completed 2 ad hoc reviews for Neuroscience Letters; I completed 1 ad hoc review for Behavioural Processes. I estimate that it takes at least 8 hours to provide a critical reading and write each review. Thus, I estimate that the total time was at least 40 hrs.