It is obvious enough that the results of a test of this kind cannot be anticipated, not alone because there are marked differences between individuals in the readiness with which they will manifest involuntary movements, but also because the intensity of the attention and the momentary condition of the subject are important and variable factors in the result. With very good subjects it becomes quite safe to predict the general nature of the tracing; and the different tracings of the same subject often bear a family resemblance. We must now learn what we can of the various factors which influence these subconscious handwritings. That indefinitely complex combination of natural and nurtural circumstances, to which we give the name of character, or individuality, or personality, doubtless presents the most striking factor in this, as it does in normal handwriting; and in both cases analyses are inevitably vague and confined to prominent points of difference. Extreme types are always interesting and at times instructive. The tracing of Fig. 3 was obtained under the same circumstances as Fig. 2, but with a subject whose tendency towards involuntary movements is far more marked, is indeed unusual. The total extent of the movement is more than three times as great as in the former case, and it twice changes its direction. This latter characteristic is the noteworthy one, for it is due to the fact that the colors which the subject was reading were arranged in three rows; the first row was read from left to right (corresponding to a downward direction in the figure); the second row was read in the reversed direction; and the third row in the original direction again. The completeness of correspondence between the movements of the hand and of the attention leaves nothing to be desired. This subject yielded the most extensive and predictable involuntary movements of any whom I tested. A satisfactory impression of the variety and range of the individual differences which subjects, chosen somewhat at random, are likely to present, may be gathered from the series of records which will be reproduced as illustrative also of other influences. In Fig. 4 is represented another average record quite similar to that of Fig. 2 but produced by another subject, while reading from a printed page for three-quarters of a minute; as before the hand moves towards the focus of attention. It would be easy to present both more decided and extensive, and more uncertain involuntary records of still other subjects; while negative or quite indeterminate tracings are by no means uncommon. [Illustration: FIG. 4.--READING FROM PRINTED PAGE. Time of record, 45 seconds. Direction of the attention →. Subject facing →.]