“…Results from the present study confirmed those in the existing literature which have shown that a focused stimulation procedure can be effective in facilitating language l e a r n i n g (Camarata & N e l s o n , 1 9 9 2 ; Cheseldine & McConkey, 1979;Culatta & H o r n , 1 9 8 1 , 1982;Fey, Cleave, Long, & Hughes, 1993;Leonard et al, 1982;McConkey, Jeffree, & H e w s o n , 1979;Nelson, 1977;Willbrand, 1977). As compared to the pretreatment baseline c o n d i t i o n , the mean level usage attained for should/must coding obligation in the B treatment phases was 40%, with an average of 29% usage in probes taken during these phases.…”