Abstract
A comparison was made of the developmental courses of sucking strength and manual strength. For combined sexes, the two functions develop at markedly nonparallel rates, sucking varying much less with age than manual strength. The sexes differed in both functions, but much less in the development of sucking strength. Among children, the developmental rates of the two functions were more disparate than for adults. Also, young Ss were relatively better at sucking than at manual strength but for mature Ss the reverse was true. Within age groups the variability of sucking was much greater than for manual strength. Genotype, training, attitude toward the test and complexity of the task might contribute to the greater variability of sucking.
Get full access to this article
View all access options for this article.