According to the sociocognitive approach, true language development is achieved when?

The sociocognitive approach emphasizes the importance of social interaction and cognitive processes in language development. True language development, from this perspective, entails the ability to adapt language use appropriately across various social contexts. This means that a student can modify their expression based on the audience, setting, and purpose of communication. For instance, individuals might use formal language in a job interview while opting for more casual language with friends.

The other options do not encapsulate the essence of the sociocognitive approach as effectively. Memorizing vocabulary, for instance, is a component of language learning, but it does not reflect the deeper cognitive and social understanding required for true language development. Speaking fluently without errors might suggest proficiency, but it does not account for the contextual nuances that real-life communication often demands. Similarly, relying solely on written language does not encompass the full range of language use, which includes spoken interaction and adaptability in varied conversational situations. Therefore, modifying expression in different contexts exemplifies the practical, socially-rooted aspect of language that the sociocognitive approach champions.