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 in the field of the syllable-series the question at issue, and to trace an eventual dependence of the strength of the association upon the sequence of the members of the series appearing in succession in consciousness.

Researches were again carried out with six series of 16 syllables each. For greater clearness the series are designated with Roman numbers and the separate syllables with Arabic. A syllable group of the following form constituted, then, each time the material for research:

If I learn such a group, each series by itself, so that it can be repeated without error, and 24 hours later repeat it in the same sequence and to the same point of mastery, then the latter repetition is possible in about two thirds of the time necessary for the first. The resulting saving in work of one third clearly measures the strength of the association formed during the first learning between one member and its immediate successor.

Let us suppose now that the series are not repeated in precisely the same order in which they were learned. The syllables learned in the order I(1) I(2) I(3)&hellip;I(15) I(16) may for example be repeated in the order I(1) I(3) 1(5)