Caldwell's Home Observation for Measurement of the Environment (HOME) was developed to provide specific and sensitive information about the home and maternal environment as a stimulus to infant learning and development. The use of the HOME scale was examined in a sample of 118 middle- and lower-income mothers and their low-birth-weight (LBW) or very-low-birth-weight (VLBW) infants. The analysis of data demonstrated limited variability in the HOME scale total scores within each income group, and income alone was found to account for 41% of the variance in the sample. These findings raise questions about the effectiveness of the HOME scale in making useful discriminations about family functioning within an income group.