The Quantified Behavioral Test
The Quantified Behavioral Test (QbTest; QbTech Ltd, QbActivity includes data from the parameters Time Active, Distance, Area and Microevents.Time Active is the time (in per cent) the patient has moved more than one centimetre per second (0,4 inches/second). Distance refers to the interval travelled by a reflective marker during the test. Distance is measured in meters. Area is the surface covered by the headband reflector during the test. A Microevent occurs when marker changes its position more than one millimetre since the last Microevent.QbInattention include the parameters Omission Errors, Reaction Time, Reaction Time Variation and Normalized Variation. An Omission Error occurs when no response is registered to a Target stimulus (the button was not pressed when it should have been). Reaction Time is the average time it takes for the patient to press the response button after the stimuli have been presented. The Reaction Time is measured only when a correct button press is registered. The reported time is measured in milliseconds. Reaction Time Variation is the standard deviation of the Reaction Time. Normalized Variation is the Reaction Time Variation expressed in terms of Reaction Time.QbImpulsivity includes data from the parameter Commission Error. A Commission Error occurs when a response is registered when the stimulus was a Non-target (the handheld button is pressed when it should not have been pressed). The Error Rate is a measure of the overall accuracy. The Error Rate tells how often the patient has responded incorrectly (pressed the Responder button for non-targets and/or not pressed for targets).The test time for the QbTest is 20 min and is divided into four five-minute Quartiles, Q1, Q2, Q3 and Q4. The first five-minute Quartile (Q1) is excluded from the analyses, due to many patients have an inconsistent response style in the first five minutes. The analysis is based on the three five-minute Quartiles Q2, Q3 and Q4.