94 



Indiana University Studies 



TABLE IX.— DEPENDABILITY BY QUARTILES, GRADE 6B 



A Distribution of the 83 6B Pupils into Quartiles, Based on De- 

 pendability AS Shown in the February Test, and the Change in 

 Dependability in These Same Groups as Shown by the June Test. 





Lower 

 Quartile 



Lower 

 Half 



Upper 

 Quartile 



Upper 

 Half 



Average Dependability. . . . ^ 



19.5 

 43 



35.5 

 54.8 



89.5 

 77.5 



80 



73.6 



Percent Making ■ 



Gain 



Loss 



[No change 



72 

 19 



9 



74 

 21 



5 



28.5 

 62.5 

 9 



44 

 51 



5 



For those who made /(I) Total gains made. . 

 gains \(2) Average gain 



571 

 38 



960 

 30 



75 



12.5 



273 

 15.1 



For those who made f(l) Total loss made. .. . 

 losses \(2) Average loss 



70 

 17.5 



149 

 21.3 



367 

 28 



547 

 26 



For those who made no change, scores were . . | 



0 

 33 



\ 



0 

 33 



100 

 100 



100 

 100 



Did the Pupils Who Needed to Gain Profit by This Drill? 



Table IX is for the 6B grade and for dependability only. 

 What is true of this grade is true of all grades. The 83 pupils 

 were arrayed according to their dependability scores made in 

 February test, beginning with 100 per cent and ranging down to 0. 

 The median was determined, as well as the upper and lower 

 quartiles. Then the score made by each pupil in June was placed 

 just opposite his February score and the change computed. 

 Notice what happened to the lower quartile. The average 

 dependability of the lower quartile in February was 19.5 per 

 cent, in June it was 43 per cent. Seventy-two per cent of the lower 

 quartile gained in dependability with an average gain of 38 

 per cent each. Nineteen per cent lost in dependability with an 

 average loss of 17.5 per cent. Nine per cent or 2 pupils made no 

 change from February to June. The score of one was 0, of the 

 other 33 per cent. 



The pupils whose scores fell into this lower quartile were 

 undoubtedly in greatest need of improvement. Note that 72 

 per cent did make an average gain of 38 per cent. The 19 per 

 cent who lost in dependability and the 9 per cent who made 

 no change we found were 6 boys, 2 of whom at least were ''border- 

 line" cases. The average age of the 6 boys was 13 years and 3 



