Boris Sidis,
The Foundations of Normal and Abnormal Psychology…
(1914
| notes)
“ Some eminent psychologists go to the length of affirming that even the lowest representative animal life, the protozoa (possibly bacteria, bacilli) , possess ideational and volitional processes, that the lower stages of mental life manifest association, reproduction, memory, cognition, and recognition. Other psychologists are more moderate, they regard the acquisition of knowledge as adaptation through habit, characteristic of the lowest representative of animal life. Thus one psychologist propounds the question, "How is it that we or the brute learn to do anything?" ”
