Table 1.

Coding categories for infant postures.

Posture	Definition
Lying
Prone	Infant is lying on his/her stomach
Supine	Infant is lying on his/her back
Sitting
Sit Supported	Infant is seated with support provided by one or both hands, the caregiver, or objects (e.g., pillows).
Sit Unsupported	Infant is seated without support from the hands, caregiver, or other objects.
Kneeling
Kneel	Infant is on one or both knees with no support. Both hands are free to move.
All-4	Infant is on hands and knees.
Standing
Stand Supported	Infant is standing with support from one or both hands, a caregiver, furniture, or an object.
Stand Unsupported	Infant is standing without support from the hands, caregiver, or other objects.
Squat	Infant is standing on both feet with knees bent at an angle less than 90 degrees.