490 

 TABLE XII. Observer D. 



I 



(18) 



II 



(8) 



Groups 



Arithm. mean 



1st 



interval 



2nd 



interval 



3rd 



1st 



interval 



2nd 



interval 



3rd 



0.90 

 0.79 

 1.28 

 l.U 

 1.05 

 0.81 

 1.60 

 1.99 

 0.96 

 0.72 

 0.99 

 0.80 

 1.43 

 2.36 

 0.91 

 0.66 

 1.66 

 1.50 

 0.79 

 0.90 



Mean deviation 



0.16 

 0.13 

 0.37 

 0.20 

 0.37 

 0.23 

 0.65 

 1.06 

 0.21 

 0.16 

 0.37 

 0.15 

 0.55 

 1.24 

 0.42 

 0.17 

 0.98 

 0.74 

 0.39 

 0.69 



Median 



0.83 

 0.80 

 1.05 

 1.10 

 1.02 

 0.75 

 1.30 

 1.40 

 0.95 

 0.72 

 0.82 

 0.77 

 1.25 

 1.80 

 0.66 

 0.60 

 1.07 

 1..35 

 0.65 

 0.47 



fervals is generally more uniform with II, though here also the 

 rhythm is as a rule preserved better for the groups than for the 

 intervals. 



3. With respect to the changes in the rhythm with greater famili- 

 arity with the material, we observe that most often the time, falling 

 to *every syllable of the groups into which the series is divided, 

 increases progressively as the observer gets more familiar with the 

 material. The tendency of the rhythm to quicken in the order of 

 the groups is kept up when the familiarity with the material 

 increases. Barring an occasional deviation, the first interval is either 

 greater than the second or equal to it. The tendency of the second 

 to decrease, in relation to the first, as vaguely indicated already in 

 the rhythm of the first repetition, is kept up all through the learn- 



