A big problem with investigating whether Specific Language Impairment (SLI) is genuinely specific to language is.
A) It is rare, so sample sizes tend to be small
B) SLI is not homogeneous, different people might show different underlying causes
C) There is debate as to what aspects of cognition are specific to language
D) b and c

Question

Quizplus · Accepted Answer

SLI is not a homogenous disorder, and different people might show different underlying causes. Additionally, there is debate in the field as to what aspects of cognition are specific to language, which makes it difficult to determine if SLI is genuinely specific to language. These factors make investigating SLI a challenge.

A Big Problem with Investigating Whether Specific Language Impairment (SLI)