Which term identifies the interaction of language systems in the mind affecting language performance or development?

• A. Cross-Linguistic Influence
• B. Developmental Features
• C. Declaritive Knowledge
• D. Correlation

Answer: (A)

Cross-linguistic influence captures how multiple language systems stored in the mind interact and shape how we perform or develop language. In bilinguals or multilinguals, features from one language can intrude into the other during speaking, listening, or learning, leading to either facilitation or interference. This is why it can speed up learning when languages share similarities or create errors when structures differ across languages. The term directly names this interaction between language systems and its effect on performance or development.

Developmental features describe changes over time in language ability, not the interaction between languages. Declarative knowledge is about conscious facts and rules we can recall, not how languages influence each other. Correlation is a statistical relationship between variables, not a linguistic interaction phenomenon.