Infant Assessment Unit - Home Observation for the Measurement of the Environment


Infant Assessment Unit - Home Observation for the Measurement of the Environment


The Infant Assessment Unit (IAU) was part of the Longitudinal Cohort Study. The objective of the IAU was to observe how prenatal and postnatal conditions affect the health and cognitive functioning of infants during the first year of life. Consisting of several instruments, the IAU sought to measure infant cognition and quantify the experiences of the sampled infants from Cohort 0 during their first 12 months of life. Additionally, the IAU examined the circumstances surrounding the mother's pregnancy and the subsequent care received by the infant. The IAU was administered to subjects or primary caregivers in Cohort 0 only in Wave 1 of the LCS.

The Home Observation for Measurement of the Environment (HOME) instrument (PDF 3.3M) was included in the IAU to evaluate the various aspects of the subject's developmental environment that could affect future positive or negative social behaviors. In addition, the PHDCN version of the HOME inventory carefully assessed the various aspects of the physical environment in which the subject lived, including the living conditions present inside the home and the state of the surrounding neighborhood. It was administered to the subject's primary caregiver.


Caldwell, B. & Bradley, R. (1984). Home Observation for Measurement of the Environment (HOME) - Revised Edition. University of Arkansas, Little Rock.

Selner-O'Hagan, M & Earls, F. (1994). PHDCN version of the HOME Inventory. unpublished manual.

Other References

Bradley, Robert H. and Bettye M. Caldwell. "The HOME Inventory: A Validation of the Preschool Scale for Black Children," Child Development, June 1981, pp. 708-710.

Goelman, Hillel, Ellen Shapiro, and Alan R. Pence. "Family Environment and Family Day Care," Family Relations, January 1990, pp. 14-19.

Elardo, Richard, Robert H. Bradley, and Bettye M. Caldwell. "The Relation of Infants' Home Environments to Mental Test Performance from Six to Thirty-six Months: A Longitudinal Analysis, Child Development, March 1975, pp71-76.

Related Internet Resources

HOME inventory information from FRIENDS National Resource Center for Community-Based Child Abuse Prevention

Description of the Caldwell HOME inventory from the United Nations University website

PHDCN Administration

Shaded boxes indicate that the measure is not available for a given wave/cohort.

Wave Cohort
0 3 6 9 12 15 18

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