A recently recovered cumulative recorder provides a missing link in the evolution of the cumulative recorder from a modified kymograph to a reliably operating, scientifically and commercially successful instrument. The recorder, the only physical evidence of such an early precommercial cumulative recorder yet found, was sent to Keio University in…

The study undertook to teach and fix the reading of meaningful symbols (hiragana, the Japanese syllabary alphabet, and kanji, Chinese characters) to a mildly retarded 7 year old Japanese boy. The phonological method was used to teach hiragana and pictures were used to teach kanji. Behavior modification using reinforcement and time out was…