Switch Activation

Switch activation is defined as when the switch is pressed to activate the modified ride-on car and make it "go", thereby moving in space from one place to another [30]. Switch activation may occur from the child in the modified ride-on car independently or with assistance (either physical or verbal cueing) from others. Assistance may be provided by a sibling or peer, or an adult such as a parent/caregiver or clinician. The duration of switch activation, who activated the switch, and the level of assistance, if any, provided to the child using the modified ride-on car will be coded. Total switch activation time (minutes and seconds) and percentage of time of each 10-min video will be coded and reported. Switch activation analyses will be carried out at the end of week 4, 8, and 12 of the intervention.

Inter- and intra-rater reliability (at least 85% agreement) will be established on 10% of the video recordings amongst one expert coder and two secondary coders. Training will include coding of video recordings, discussion of disagreements, and coding of additional videos until reliability is established. All videos will be coded in Datavyu.
