RECORDS OF MEETINGS 363 



For the classes which took the hour's 'practise in 22 1 / ^-minute periods, 

 there was an average gain of 61 per cent., median 49 per cent.; in 15- 

 minute periods, average gain 55 per cent., median 43 per cent.; in 

 6-minute periods, average gain 54 per cent., median 44 per cent. 



Dr. Mead said in abstract: 1. Data. — 50 "normal" children (25 

 boys and 25 girls), averaging less than six years of age, of graduate 

 students of Teachers College and Columbia College. Ages were thrown 

 to the nearest month. Walking means : "To take a step unassisted." 

 Talking means : ''To use a word intelligently, i. e., to associate the idea 

 with the object." 



Results. — The median "normal" child begins to walk at 13.5 months, 

 with a probable error of 1.06 months. The chances are 999 to 1 that 

 the true median will not differ from the median obtained by more than 

 .66 month. The extreme range is from 11 to 30 months. .90 per cent, 

 of the cases fall between 11 and 17 months. The median "normal" child 

 begins to talk at 15.7 months, with a probable error of 2.83 months. 

 The chances are 999 to 1 that the true median will not differ from the 

 median obtained by more than 1.96 months. The extreme range is from 

 9 to 25 months. 90 per cent of the cases fall between 10 and 21 months, 

 with 18 months as the mode. 



II. Data. — 145 "schoolable" children (boys and girls) of the Indiana 

 School for Feeble-minded Youth, in reply to the question on the personal 

 descriptive entrance blanks : "At what age did the child commence to 

 walk?" and 92 in reply to the question: "At what age did the child 

 commence to talk?" 



Results. — The median feeble-minded child begins to walk at 21.8 

 months, with a probable error of 7.56 months. The chances are 999 to 

 1 that the true median will not differ from the median obtained by 

 more than 3 months. The extreme range is from 12 to 72 months. 90 

 per cent, of the cases fall between 13 and 50 months. 



The median feeble-minded child begins to talk at 34.2 months, with a 

 probable error of 12.6 months. The chances are 999 to 1 that the true 

 median will not differ from the median obtained by more than 6.5 

 months. The extreme range is from 12 to 156 months (only one case 

 going above 108 months). 90 per cent, of the cases fall between 14 and 

 84 months. 



Dr. Myers said in abstract : A test was desired wherein the thing to 

 be remembered should be merely incidental and where the focus of the 

 subject's attention should be directed away from the facts to be called 

 for after the exposure of the stimuli, but where these facts would have to 

 enter, wholly or in part, into the experience of the subject. To this end a 



