| Year: | 1885 | |
| Short description: | Ebbinghaus's "Das Gedachtnis: Untersuchungen zur experimentellen Psychologie" | |
| Medium description: | H. Ebbinghaus's "Das Gedachtnis: Untersuchungen zur experimentellen Psychologie" Experiments on memorization of syllables in a particular order or of paired syllables and words. | |
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