A generalizability study was conducted to examine the consistency and stability of scores on a measure of environmental stimulation over the first two years of life. Total scores on the HOME inventory were quite consistent over time, but subscales were less so. Examination of subscales by canonical correlation and principal components factor analysis indicated that the organization of the environment changes over the first two years of life, and it is the amount of stimulation, rather than the particular type of stimulation, which is relatively stable.
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