Table 3 Reasons for early termination of measurements

Eye-tracking:

 - VOF task

• Not paying attention to the screen (11%)

• Not being able to sit still (7%)

• Stress/anxiety (4%)

 - Social preference task

• Failed calibration (54%)

fNIRS

• Pulling off the headcap (40%)

• Showing signs of protest (crying, headbanging, hitting, kicking; 40%)

Indirect calorimetry

• Pushing off the hood or pulling of the hose (38%)

• Not being able to lay still (33%)

• Showing signs of protest (crying, kicking; 33%)

BIA

• Shaking off the wires or pulling loose the clips (43%)

• Showing signs of protest (13%)

BOD POD

• Anxiety before going into the closed pod (9%)