Typical uses of object |
Shakes/waves |
Infant shakes, waves, or twiddles the object while holding it with one or both hands. Coded as duration |
Bangs/taps |
Infant uses one or both hands to hit, bang, or pound on an object, or uses an object to hit, bang, or pound another object, such as the table. Coded as duration |
Mouths |
Infant licks, sucks, or chews on an object. Instances where the child was sucking on the nipple of the bottle were not scored. Coded as duration |
Throws/pushes |
Infant throws the object, drops it off the table, or pushes it toward the examiner, ending their interaction with that object. Coded as frequency |
Atypical uses of object |
Spins |
Infant drops, tosses, or manipulates an object in order to make it spin or wobble. Coded as frequency |
Rolls |
Infant pushes a round object along a surface so that it rolls. Coded as frequency |
Rotates |
Infant turns, flips, or rotates object at least twice. Coded as duration |
Unusual visual |
Infant engages in prolonged visual inspection (>10 seconds), examines object from odd angles or peripheral vision, or squints or blinks repeatedly while examining object. Coded as duration |