Intelligence and social valuation; a practical method for the diagnosis of mental deficiency and other forms of social inefficiency - Softcover
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 Excerpt: ... of importance to those who are concerned with the care of the child, and as our own observations have riot dealt with the earlier years of life and of infancy, we have endeavoured to supply the missing data by calculation, and so complete the picture of head growth from birth onwards. The dimensions of the human skull at birth are very accurately known and may be given as follows:--Maximum length 117.5mm. Maximum breadth 92.5mm. Maximum height 95.0mm. By adding approximately 3mm. to each of the foregoing as an allowance for the thickness of the soft parts of the scalp in the head of the human infant there are obtained the figures at birth as given in Table 12. As bodily growth proceeds rapidly during the first year of life, and somewhat less so during the next three years, there are obtained by calculation the lengths, breadths and heights of the head during those years. From the 5th to the 9th years the calculations are made on the assumption which Pearson (5) has shown to be certainly the case for breadth, that head growth, as regards single measurements, is uniform. From the 10th year onwards the head dimensions are those actually observed by us on the living Victorian Public School boy and University student, whilst the head measurements are also known of the Victorian State School boy from the 6th to the 14th years. Table No. 12 Table Of Average Lengths, Breadths And Heights Of The Head In Males Of All Ages From Birth Up To Adolescence. From birth ft the )th year inclusive the measurements are obtained by calculation and are, therefore, only to be regarded as an approximation. From the wth year onwards the figures are as actually observed on the living subject. Before these figures, as calculated for the dimensions of the head during the years of infa...
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