According to research by victoria molfese and her colleagues, was the single most important predictor of scores on iq tests among children age 3 to 8.

The home environment

Explanation:

Home environment refers to the environment comprised of a home or home, that is, a particular environment of a restricted group, usually familiar, and may also be of another type to also house friends. This kind of environment is very important for a child's intellectual and social development. The home environment is so important that, according to research by victoria molfese and her colleagues, this environment represents the most important predictor of qi test scores among children aged 3 to 8 years.