The answer to the question is goodness of fit.
Goodness of fit here refers to a style of parenting identified by Alexander Thomas and Stella Chess. They believed that parents who exhibit this parenting style shows that there is congruence or fit between the child’s personality and the parenting practices that the child’s parents use. Each child might require a different approach in parenting, and when there is a mismatch between the two, a poorness-of-fit situation will instead come into effect.