Table 2.

Top three errors by type in the usability test session.

Error type	Errors	Options
Error type I	Web design usability issuesa	Poor scroll bar visibility in diet and activity sections
Error type II	Response inconsistencies	Number of physical education classes per week
		Children reporting they had already completed the task when in fact they had not
		Name misspelled
Error type III	Requests for help	To choose an option
		To type in own name
		To select date of birth
Error type IV	System bugs and Internet failure	“Continue” button visible before response options appeared on the screen
		Old version of the intensity scale for physical activities used in the questionnaire
		Need to click twice or more to continue the questionnaire

^aThere was only one error of type I.