It all began with a study by Karl Marbe in 1901, which was very similar to the above, except that small weights were used.16 The subject was asked to lift two weights 16 K. Marbe, Experimentell-Psychologische Untersuchungen über das Urteil, eine Einleitung in die Logik (Leipzig: Engelmann, 1901). 38 The Mind of Man in front of him, and place the one that was heavier in front of the experimenter, who was facing him. And it came as a startling discovery both to the experimenter himself and to his highly trained subjects, all of them introspective psychologists, that the process of judgment itself was never conscious. Physics and psychology always show interesting contrasts, and it is one of the ironies of science that the Marbe experiment, so simple as to seem silly, was to psychology what the so-difficult-to-set-up Mi-chaelson-Morley experiment was to physics. Just as the latter proved that the ether, that substance supposed to exist throughout space, did not exist, so the weight-judgment experiment showed that judging, that supposed hallmark of consciousness, did not exist in consciousness at all. But a complaint can be lodged here. Maybe in lifting the objects the judging was all happening so fast that we forgot it. After all, in introspecting we always have hundreds of words to describe what happens in a few seconds. (What an astonishing fact that is!) And our memory fades as to what just happened even as we are trying to express it. Perhaps this was what was occurring in Marbe’s experiment, and that type of thinking called judging could be found in consciousness, after all, if we could only remember. This was the problem as Watt faced it a few years after Marbe.17 To solve it, he used a different method, word associations. Nouns printed on cards were shown to the subject, who was to reply by uttering an associate word as quickly as he could. It was not free association, but what is technically called partially constrained: in different series the subject was required to associate to the visual word a superordinate (e.g. oak-tree), co-ordinate (oak-elm), or subordinate (oak-beam); or a whole (oak-forest), a part (oak-acorn), or another part of a common whole 17 H. J. Watt, “Experimentelle Beitrage zur einer Theorie des Denkens,” Archiv für geshihte der Psychologie, 1905, 4.: 289-436. T H E C O N S C I O U S N E S S O F C O N S C I O U S N E S S 3 9 (oak-path). The nature of this task of constrained associations made it possible to divide the consciousness of it into four periods: the instructions as to which of the constraints it was to be (e.g., superordinate), the presentation of the stimulus noun (e.g., oak), the search for an appropriate association, and the spoken reply (e.g., tree). The introspecting observers were asked to confine themselves first to one period and then to another, and thus get a more accurate account of consciousness in each. It was expected that the precision of this fractionation method would prove Marbe’s conclusions wrong, and that the consciousness of thinking would be found in Watt's third period, the period of the search for the word that would suit the particular constrained association. But nothing of the sort happened. It was the third period that was introspectively blank. What seemed to be happening was that thinking was automatic and not really conscious once a stimulus word had been given, and, previous to that, the particular type of association demanded had been adequately understood by the observer. This was a remarkable result. Another way of saying it is that one does one’s thinking before one knows what one is to think about.

• memory
• nature
• stimulus
• consciousness
• psychology
• science
• physics