2.4.2. Secondary Outcome Measures

The Gross Motor Function Measure (GMFM-88) is a reliable and valid multidimensional instrument to assess change in gross motor abilities in children with CP [

To assess We aimed to score two videos of each intervention week with a minimum of two days in between (in total 16 videos per infant). Videos or trials were excluded if (1) the arms or eyes of the infant could not be observed due to a wrong camera position; (2) the quality of the video was too low to be scored properly; (3) the wristband was switched on by the parent during the trial; (4) a deviation of the intervention protocol was observed (e.g., the parent presented a toy before the infant looked at the wristband); and (5) obvious environmental distraction by the infant was observed. Selected videos were scored in a nonchronological order to reduce expectation bias. From each video, the first five consecutive trials that met the inclusion criteria were scored.A scoring guideline (Video Observation Attention Affected Hand (VOAAH)) was developed for this purpose. Evaluation of the scoring guideline showed excellent (ICC 0.984) and good (ICC 0.889) intrarater reliability for 
