Exercise $4-5$

A$.$J$.,$ age $4$ years, $11$ months, was a boy who produced fricatives in complementary distribution $($Gierut$,1985$b; in press$).$ A$.$J$.$ was given an opportunity to produce all target fricatives; however, he produced only two fricatives. Moreover, these two fricatives never $co$ occurred in the same position. From the transcriptions listed below, identify this case of complementary distribution.

What are two fricative sounds that A$.$J$.$ produced?

Each of these two fricatives occurred in a different phonetic environment. List the context $($in this case, initial, intervocalic, or final position$)$ in which each fricative occurred.

Is the occurrence of these fricatives mutually exclusive?

Generally describe the complementary nature of these two fricatives.