Table 2.

Experimental tasks

Items		Performance Criteria					Key Item Features
Functional	Nonfunctional	Bilateral/ Unilateral	Position	Location	Movement Dynamic	Repetition	Object Affordance	Unique Movement
Shake maraca	Shake potato masher	Object hand moves, other hand still	Grasps radially	Object strikes opposite hand	Lateral movement	Repeated movement (×3)	Makes sound	Hit against palm
Scribble marker	Scribble straw	Holds object in only one hand	NA	Marker tip on paper surface	Moves marker back and forth	Repeated movement (×3)	Makes line on paper	Scribbled wavy line
Blow cotton	Blow stone	NA	NA	Object on table surface	Child leans and blows on object	NA	Moves object across table	Blows on object to move
Shake bells	Shake cloth	Holds object in only one hand	NA	Holds above eye level	Lateral movement	Repeated movement (×3)	Makes sound	Waves over head
Line with marker in mouth	Line with stick in mouth	NA	Object held in mouth	Object tip on paper surface	Child moves head to move object tip	NA	Makes line on paper	Marker held in mouth
Poke putty	Poke sponge	Uses only one hand	Uses thumb pointed downward	NA	Drill thumb into object with rotation	NA	Makes hole in putty	Twists thumb into putty
Tear lollipop wrapper	Tear paper	Holds object in only one hand	NA	Places object between teeth	Pulls object in teeth away from mouth	NA	Removes wrapper	Tears with teeth
Lick lollipop	Lick plastic disk	Holds object in only one hand	NA	Brings object to protruding tongue	Pulls object down across tongue	Repeated movement (×3)	Tastes lollipop	Pulls object across tongue