The child is raised in isolation from human contact often show extreme, long-lasting language deficits that are rarely entirely overcome by later exposure to language. This evidence support to which aspect of language development ?

Question

Accepted Answer

The question highlights the scenario where a child raised in isolation from human contact exhibits significant and often irreversible language deficits. This situation supports the environmental aspect of language development, which is why Option 1 is the correct answer.

1. **Explanation for Option 1 (Environmental):**
   The environmental aspect of language development emphasizes the role of external factors, such as social interaction and exposure to language, in acquiring language skills. When a child is isolated from human contact, they lack the necessary environmental stimuli and interactions that are crucial for language development. This lack of exposure leads to severe language deficits, as the child does not have the opportunity to learn and practice language through interaction with others. The fact that these deficits are rarely entirely overcome by later exposure underscores the critical period during which environmental input is essential for normal language development. Therefore, the evidence presented in the question strongly supports the environmental perspective.

2. **Explanation for why other options are incorrect:**

- **Option 2 (Biological):**
     The biological aspect of language development focuses on the innate, genetic, and neurological factors that contribute to language acquisition. While biological factors are important, the question specifically addresses the lack of language development due to isolation, which is an environmental factor. The deficits observed are not due to biological limitations but rather the absence of environmental interaction, making this option incorrect in the context of the question.

- **Option 3 (Interactionist):**
     The interactionist perspective combines both biological and environmental factors, suggesting that language development results from the interplay between innate abilities and social interaction. Although this perspective acknowledges the role of environment, the question specifically highlights the absence of environmental interaction as the primary cause of language deficits. Therefore, while interactionist views are relevant, the question's focus on isolation aligns more directly with the environmental aspect alone, making this option less precise.

- **Option 4 (Pragmatic):**
     Pragmatics refers to the use of language in social contexts and understanding the rules of communication. The question does not address the social use of language or communication rules but rather the fundamental acquisition of language skills due to environmental isolation. Thus, the pragmatic aspect is not the focus of the evidence provided, rendering this option incorrect.

In conclusion, the evidence of language deficits due to isolation from human contact strongly supports the environmental aspect of language development, making Option 1 the correct answer.