Research examining the association between infants' ability to detect differences among speech sounds at the age of 6 months and their later language...

Research examining the association between infants' ability to detect differences among speech sounds at the age of 6 months and their later language skills has demonstrated that 6-month-old infants:

who were better able to detect differences scored higher on some tests of language skills at later ages.

who were better able to detect differences scored lower on some tests of language skills at later ages.

varied in their ability to detect differences, but there was no association between this ability and later language skills.

did not vary in their ability to detect differences, and thus there was no association between this ability and later language skills.