Final answer:
The association between the heritability of learning disorders and parental education is nuanced; while genetics play a role, the educational level and socioeconomic status of parents contribute significantly to the early developmental environment, which influences learning outcomes and the manifestation of disorders.
Step-by-step explanation:
The question explores the heritability of learning disorders and their association with the educational level of parents. Research indicates that the developmental environment provided by parents, including the quality and quantity of interaction, greatly influences early language ability and the progression of learning in children. Wealthier and more educated parents tend to engage in more enriching, verbal interactions and provide a wider array of stimulating experiences, which can lead to higher cognitive development and academic achievement in their children. Conversely, children from lower-income families may experience less verbal interaction and more stress, potentially affecting brain functions that relate to IQ and learning abilities.
Therefore, while heritability certainly plays a role in the development of learning disorders, the environment, particularly the educational and socioeconomic context in which a child is raised, is also a significant factor. While twin studies suggest a genetic component to intelligence, the evidence also emphasizes the crucial impact of a rich early developmental environment on intelligence levels and the challenges posed by learning disabilities.