SUMMARYOne‐hundred and thirty‐two adolescents suffering from severe psychiatric disturbance were examined, and their skeletal maturity was assessed from an X‐ray of their left hand and wrist. The skeletal maturity of this group was compared with standards set out by Tanner, Whitehouse and Healy. The comparison indicated thatafterthe age of fourteen there was a lag in the maturity of the psychiatrically disturbed group. The significance of these results is disc
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