According to my research on studies having to do with child development, I can say that based on the information provided within the question the most important home factor is parental involvement with the child. Children need to be loved as well as being disciplined. Parental involvement can shape a child's development and set him on the correct path.
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A healthy personality will envolve all aspects of life. Both seeing the good and the bad in people. If a person only sees one aspect of people, then life will be hard for them.