“’General Intelligence’, Objectively Determined and Measured”, 1904-04-01 (; backlinks; similar):
Determined the connection between psychical tendencies and, that between ‘mental tests’ and psychical activities of greater generality and interest, on the basis of correlation.
A critical review of previous and present studies showed that no conclusive results could be obtained. Experiments were confined to testing the sensory discrimination of hearing, sight and touch, using the monochord, a graduated series of colored cards, and a graduated series of weights constructed on Galton’s cartridge pattern, respectively, for the 3 conditions. 5 series of experiments were conducted involving varying number of Ss.
The results indicated that all branches of intellectual activity possess in common one fundamental function, whereas the remaining or specific elements of the activity seem to be wholly different from that in all the others.
In adult life no difference between the two sexes was observed.