Description

For sample persons under 5 years old, SMILEV reports if the child has ever smiled at someone when they talked to or smiled at him or her without being touched.

Child motor and social development variables should be combined with AGE, BIRTHMO (Month of birth), and INTERVWMO (Month of NHIS interview) to provide complete information about the child's developmental progress. For more information on how the child's specific age is relevant to this variable, please see HEADTURNEV.

For related variables, please use the IPUMS NHIS search function and drop-down menus.

Comparability

There are no comparability issues.

Universe

Availability

• 1981

Weights

• 1981 : SAMPWEIGHT