The present study focuses on the capacity of illiterate adults to mast
er three different metalinguistic tasks: judgment of phonological leng
th of words, initial consonant deletion, and lexical segmentation of s
entences. Illiterates' performance, during a pre-test and after traini
ng, was compared with that of literates and partial illiterates (adult
s at the beginning of the process of acquiring literacy) who received
the same training. In the pre-test, illiterates were lower than litera
tes in the three tasks; and partial-illiterates were at an intermediat
e level in two of the tasks. The three groups profited from the traini
ng, especially illiterates and partial-illiterates for whom improvemen
t was dramatic across all three tasks. Finally, the results revealed a
hierarchy of difficulty across the tasks. The capacity to focus on th
e phonological dimension seemed to be a prerequisite for the phoneme d
eletion ability. The task of lexical segmentation seemed to be more a
measure of syntactic awareness than a measure of phonological awarenes
s.