Interrelations Among Perception, Learning Ability and Intelligence in Mentally Deficient School Children.

In that extraordinary work, "Les enfants anormaux" (Binet and Simon, 1907), Alfred Binet already emphasized how frequently children of "weaker mind" resemble in certain respects large numbers of mentally normal children. Binet had little faith in vague concepts such as "memory" and suggested rather that various types of mental activity, which at first appear quite similar, be carefully discriminated. By means of brief but ingenious tests, Binet succeeded in discovering a mode of intellection called "sensorial" which is operative among both the deficient and the normal, as well as another mode wherein judgment is the dominant element and whereof the deficient seem to be woefully deprived. [ABSTRACT FROM AUTHOR]