His microgenetic studies on human perception have made it possible to understand the process by which human beings manage to comprehend the environment and construct meaning. , in his work On expressive language, distinguishes two modes of perception inherent to the human experience.
Sus estudios microgenéticos sobre la percepción humana han permitido comprender el proceso por el cual el ser humano logra aprehender el ambiente y construir sentido. en su trabajo Sobre el lenguaje expresivo distingue dos modos de percepción inherentes a la experiencia humana.