B 3 37T 137 LIBRARY OF THE UNIVERSITY OF CALIFORNIA. Gl FT OF U-fUWUSW, BIOLOGY, Class LIBRARY; u AN ANALYSIS OF THE ACTION CONSCIOUSNESS, BASED ON THE SIMPLE REACTION THESIS PRESENTED TO THE FACULTY OF CORNELL UNIVERSITY FOR THE DEGREE OF DOCTOR OF PHILOSOPHY JOSEPH HERSCHEL COFFIN 1907 AN ANALYSIS OF THE ACTION CONSCIOUSNESS, BASED ON THE SIMPLE REACTION THESIS PRESENTED TO THE FACULTY OF CORNELL UNIVERSITY FOR THE DEGREE OF DOCTOR OF PHILOSOPHY JOSEPH HERSCHEL COFFIN 1907 BIOLOGY^ LlBRARf THE COMMONWEALTH PRESS, O. B. WOOD, WORCESTER, MASS. AN ANALYSIS OF THE ACTION CONSCIOUSNESS BASED ON THE SIMPLE REACTION INTRODUCTION. 1 The author began the experiments upon which this paper is based, in the fall of 1904, with the view of ultimately for- mulating some sort of definition of voluntary action, and of outlining, as accurately as might be, the psychology of it. The impulse which prompted this bit of research seems to have been one in common with a general impulse toward a more complete and satisfactory explanation of the problem which action sets to psychology. For, within the last year (1906), a number of articles and books have appeared, notably Ach's Willensthatigkeit und das Denken, and the Garmann Festschrift, all of which attack the problem of will, and of voluntary action. Generally speaking, it is safe to say that the phenomena of voluntary action have been, and are, the least understood of any group of psychical phenomena. In the course of the development of psychology, the chapter on ' will ' has inva- riably presented great difficulty to the various psychologists, no matter to what school they may have belonged. It has probably provoked more sheer speculation than any other set of mental phenomena, and also lies at the bottom of a greater number of errors and misconceptions than anything else. Moreover, a great amount of the confusion which has arisen within the science of psychology itself, both with regard to its relation to the other sciences and to philosophy, can doubtless be traced to the different interpretations which have been given to attention, will and voluntary action. His- torically, at least, the so-called psychological discussions of will have, in many instances, been purely metaphysical; and where not so, the explanations have led to many and various logical difficulties. So it is not surprising that Experimental Psychology, with its more advanced methods, and keener insight, should ap- proach the problem of voluntary action, together with other higher, more intimate and more purely psychical processes, with hope and some degree of confidence; and neither is it 1 See Appendix F. 175124 4 COFFIN surprising that the movement should be a general one. The history of science reveals the fact that advancement has usually been effected by independent, but simultaneous dis- coveries by different individuals. Hence, in relation to the above-mentioned books and articles, this article may appear to be a timely one. The Reaction Experiment has had a long and varied life, and has been put to many uses. As a psychological experi- ment, it was in its infancy from 1820, when Bessel began to investigate the difference in observation times in astronomy, and discovered what he called the 'personal equation,' to 1850, when the need was felt for a more accurate method of observation, and the Registration Method (chronoscope) was introduced. During this period it meant little more than a possible means of standardizing individual differences, in the matter of correct transit observations. In 1856, Mitchell undertook to get the absolute 'personal equation,' by the introduction of the Reaction Experiment proper. He called it the 'personality of the eye,' however, thinking it a defect of that organ. And in this connection, Hartmann discovered in 1858 that expectation and surprise greatly affect the personal equation : in all of which we have the glimmering of its psychological importance. Thus the Reaction Experiment was rinding its way into psychology from astronomy. But 30 years after the per- sonal equation had been discovered Helmholtz (1850) con- ceived the idea of using the Reaction Experiment to meas- ure the rapidity of neural excitation and transmission; so physiology became interested in it also, at a very early date. It was about this time that Donders worked out his set of experiments on the rapidity of thought, which he believed would be represented by the difference between the reaction time and the physiological time, which he thought he already knew. He therefore combined the physiological and psy- chological aspects of the experiment and made explicit its psychological value. His classic A, B, and C methods are familiar to every one who is familiar with the Reaction Ex- periment. And it was upon this as a basis that Wundt be- gan experimenting on the Reaction in 1861. 1 l For a History of the Reaction, see Sanford, A. J., 2, pp. 1-38. Cf. Titchener, "The Leipsig School," Mind, 1892, pp. 206- 534; and Manual of Psychology, Vol. 2, Pt. II, p. 356 f. Also note that Titchener paralleled his exposition of action with the Reaction Experiment in his Primer of Psychology (1898), and in his Outlines of Psychology (1895). ANALYSIS OF THE ACTION CONSCIOUSNESS 5 During: the 70's there were many reaction experiments performed. Exner (Hermann's Handbuch, Vol. II, Pt. I, pp. 262 ff.) found ten different researches, one of the impor- tant ones of which was that carried on in Helmholtz's labo- ratory by von Kries and Aurbach (Arch. f. Anatomy u., Physiologic, 1877, 297 ff.), the object of which was to find out how sensations are worked up into ideas. Thus far, then, we have noted four uses to which the Re- action Experiment has been put; (1) in astronomy, the personal equation; (2) in physiology, measurement of the rapidity of nerve currents; (3) method of finding rapidity of thought; and (4) a way of studying consciousness. The last two have significance for psychology, and it is plain that Astronomy and Physiology have offered Psychology a most fruitful method for the study of mental processes. But throughout the history of the Reaction Experiment, as used by psychologists, until comparatively recently, the main interest has always been the temporal measurement of conscious processes. Great tables of reaction times have been made; the effects of practice, fatigue, warning signals, strength of stimulus, etc., were worked out at great length, and their effects on the reaction times noted. Great elabora- tion in technique was made, but small advance in introspective data, as to the constituents of the action consciousness itself. Introspection was used mainly as a check upon the experi- ment, telling the direction and degree of attention, etc. Without doubt, the most consistent and systematic account of the Reaction Experiment for psychology, historically con- sidered, has been Wundt's treatment of it in the various editions of his Grundziige. Here, as elsewhere, in the early treatment of the experiment, the emphasis is placed on the temporal relation of the ideas, as they run their course ; and it is the chronoscopic results as to the actual time duration of the various processes that are of interest to him. A state- ment of Wundt's position with regard to the Reaction will probably best illustrate the general attitude toward the ex- periment, as represented in the literature of the 70's and 80's. This attitude would best be gleaned, however, from the first four editions of the Grundziige, for in the fifth edi- tion, his own position is slightly shifted with regard to the matter. The fourth division of the first edition of the Grundziige (1874), Wundt devotes to a consideration of "Consciousness and the Course of Ideas." The first chapter of this division takes up consciousness and attention. Omitting, for the present discussion, his analysis and characterization of at- tention as such, and his exposition of perception and apper- 6 COFFIN ception, the important point in connection with what is to follow, is, that attention is regarded as the first condition of all clear ideation. The second chapter of this division is entitled, "The Course and Association of Ideas." And here it is that the discussion of the Reaction Experiment occurs. According to this account, then, there are two ways open to the psychologist by which the course of ideas may be studied. One may either seize upon and analyze the course of memory images which constitutes so large a part of our mental life, or one may investigate the changes of ideas dependent upon sensation, i.