Which of the following statements is true regarding CALP's development time?

The statement indicating that CALP, or Cognitive Academic Language Proficiency, develops within 5-7 years without ESL methods is true. CALP refers to the advanced language skills necessary for academic success, encompassing the ability to understand and manipulate complex language forms used in educational settings, such as reading textbooks and engaging in sophisticated discussions.

Research in second language acquisition suggests that while Basic Interpersonal Communicative Skills (BICS) may develop relatively quickly, taking about 1-2 years, CALP requires a more extended period to achieve proficiency, especially in environments where ESL methods are not utilized. This longer development time reflects the complexity of academic language, which typically takes longer to master due to the need for deeper understanding and use of content-specific vocabulary and concepts, as well as the cognitive skills necessary to engage with academic materials critically.

While some approaches may expedite this process, the assertion that it takes 5-7 years without ESL methods is consistent with many experts' observations regarding the challenges faced by second language learners in acquiring the academic language required to succeed in school settings.