The acquisition of clicks by non-mother-tongue speakers
The clicks, once regarded as "clacks" by the early missionaries of the Cape in the 1820's (Shepherd, 1940: 57), are exceptional as well as unusual sounds in that they not only occur as interjections or non-linguistic gestures in some languages, but they also occur in the consonant inventory of a limited number of languages spoken in Africa (Roux, 1989b). Such sounds also occur in the Xhosa language. There is a total of fifteen clicks occuring in the Xhosa language. Table 1 presents the clicks occuring in Xhosa as well as the phonetic transcription for each of these sounds, together with the test items in which these sounds are found, as used in this study.