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Table 2 Timing of the mental energy test battery

From: Acute effects of brewed cocoa consumption on attention, motivation to perform cognitive work and feelings of anxiety, energy and fatigue: a randomized, placebo-controlled crossover experiment

Task Approximate Times (minutes)
Motivation to perform cognitive tasks 0.5
Likert scales of energy and fatigue 1
POMS fatigue and vigor scales 2.5
Serial subtraction of the number three 2
Serial subtraction of the number seven 2
Continuous performance task 2
Bakan task 16
  1. The total duration of the mental energy test battery was 26 min