A child's increase in vocabulary is influenced more by what factor than by others?

The increase in a child's vocabulary is significantly influenced by parental literacy levels because parents play a crucial role in their children's early language development and learning. When parents have higher literacy levels, they tend to engage in more complex conversations with their children, introduce more diverse vocabulary, and model reading behaviors. This interaction encourages children to explore language, which can lead to a richer vocabulary.

Furthermore, parents who are literate are likely to read to their children more frequently and provide access to books and educational materials, further enhancing language acquisition. This foundational exposure serves as a vital context for later vocabulary growth compared to other factors, which may not provide the same level of impactful engagement or learning opportunities. While television exposure, peer interactions, and video game usage can have some effects on vocabulary, they do not provide the nurturing and direct language engagement that comes from parental involvement and higher literacy levels.