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The performance of 28 children with the Nucleus multi-channel cochlear implant, who had used the device an average of 1.7 yr, was examined on a battery of speech perception measures. All children demonstrated better speech perception skills with the implant than they had in the preimplant condition with hearing aids. With the Nucleus implant, 61% of the children demonstrated some open-set speech recognition and another 14% demonstrated closed-set speech recognition. Scores on the tests were corrected for guessing and a hierarchy of test difficulty was developed. The results revealed systematic differences in performance as a function of perception task and test format. The results of regression analyses, which were performed to identify predictors of success, showed that communication mode made a significant unique contribution to the variance in performance among subjects on an open-set word recognition test. When the scores of the children who used oral or total communication were compared on the full battery of tests, however, there were few significant group differences.

T HIS study will only be a critical survey of the theory of the gene, that is, the theory of the genetical units. These units, the genes, are, according to some authors, thought to form the atoms of organization. According to this conception the genes would be the activators of all the processes of life, even of the most fundamental ones, which result in the totality that we call an organism. Goldschmidt (i928, p. 5o8) says that "die Gene Glieder eines Systems sind, naimlich der Eizelle mit Kern und Plasma am Ausgangspunkt und des gesamten Keims an jedem weiteren Punkt der Entwicklung." In this study we will discuss the function and structure of the gene in relation to the problem of organization and test the facts on which these hypotheses of the atomistic structure of life are founded.