110 



Indiana University Studies 



TABLE VIII.— COMPARISON OF DEPENDABILITY BETWEEN 

 INDIANA AND PRACTICED GROUPS 





Grade 5 



Grade 6 







Practiced 





Practiced 





Indiana 



Group 



Indiana 



Group 





Median 



Median 



Median 



Median 



Addition 



55 



72 



59 



67 



Subtraction 



68 



77 



73 



76 



Multiplication 



61 



69 



67 



55 



Division 



57 



67 



74 



79 



Summary. — On the basis of group scores and medians each 

 group made a considerable gain in each operation. 



The gain of the practiced group was the greater in each opera- 

 tion except in fifth grade division. This lack of gain may bear 

 a relation to the general lack of dependability in division in the 

 fifth grade as shown in the report of the twenty cities of Indiana 

 to which reference has already been made. 



In speed the gain is considerable, and there is a clear tho not 

 large gain in accuracy. 



The gains made by practice vary greatly in the four operations 

 both by individuals and by grades. 



The experiment gives encouragement to the idea that such 

 practice as can be given to individual pupils upon the fundamental 

 arithmetical operations in accordance with individual needs is 

 justified. However, this experiment cannot be conclusive on 

 account of the small number of pupils engaged. 



