Interview Question	Description/definition	Sources of evidence reviewed and considered
Reading	Assesses experiences of problems reading in a general fashion, and not limited to any particular domain (e.g., motor difficulties, cognitive difficulties).	Clinical experience (This item was developed to assess general problems with reading)
Tracking while reading	Assesses ability to track (moving from word to word, line to line or maintaining eyes on page) during reading.	UHDRS (Ocular Pursuit, Saccades); Focus groups; Clinical Experience
Tracking moving objects with eyes	Assesses ability to follow/track moving objects with eyes, which include ocular pursuits allowing eyes and head to follow moving objects with integrated and coordinated movements.	UHDRS (Ocular Pursuit, Saccades); Focus groups; Clinical Experience
Balance on one foot	Assesses ability to perform tasks that require balance on one foot.	UHDRS (Bradykinesia, Dystonia, Chorea, Gait, Tandem Walking, Retopulsion); Focus groups; Clinical Experience
Balance when walking	Assesses problems with maintaining balance when walking.	UHDRS (Bradykinesia, Dystonia, Chorea, Gait, Tandem Walking, Retopulsion); Focus groups; Clinical Experience
Shifting gaze	Assesses ability to shift gaze from one object to another.	UHDRS (Ocular Pursuit, Saccades); Clinical Experience
Fine motor ability	Assesses fine motor ability requiring significant dexterity of the hands and fingers.	UHDRS (Bradykinesia, Dystonia, Chorea, Finger Tapping, Pronate/Supinate, Luria, Rigidity); Focus groups; Clinical Experience
Complex motor behavior	Assesses the performance of complex motor behavior.	UHDRS (Bradykinesia, Dystonia, Chorea, Finger Tapping, Pronate/Supinate, Luria, Rigidity); Focus groups; Clinical Experience
Writing	Assesses normal adult writing ability, including legibility.	UHDRS (Bradykinesia, Dystonia, Chorea, Finger Tapping, Pronate/Supinate, Luria, Rigidity); Focus groups; Clinical Experience
Clumsiness	Assesses clumsiness, including any avoidance of tasks due to clumsiness or changes in behavior to compensate.	UHDRS (Bradykinesia, Dystonia, Chorea, Finger Tapping, Pronate/Supinate, Luria, Ocular Pursuit, Rigidity); Focus groups; Clinical Experience
Functional impact	Assess the functional impact of motor deficits (if any reported) on daily activities. Question gathers additional patient-reported descriptive data.	Clinical Experience