Before Memmo my notes were scattered across PDFs. Now a workspace pulls everything into one place — I see exactly what's still left to study.
Jean Piaget, renowned Swiss developmental psychologist and epistemologist, is best known for his groundbreaking studies with children, which led him to develop a landmark theory of cognitive development. Geldolph A. Kohnstamm's Jean Piaget: Children and the Inclusion Problem is a critical study of a cornerstone of Piaget's theory. This theory holds that a child's ability to solve problems of class inclusion marks the beginning of the period of concrete (logical) operations at about seven or eight years of age.
Kohnstamm's experiments show, however, that with directive teaching methods, most children of five can already learn to solve inclusion problems. His results make him question the basic assumption of Piaget's theory that logical operations can only develop in firmly connected groupings of operations, not in isolation. The author argues that experimenters must therefore show that children who come to master one kind of operation should also show transference to other operations of the same grouping. As a result, he questions the real existence in brain functioning of the hypothesized groupings of operations in Piaget's theory.
This book is a revised edition of the 1967 original and includes a new introduction and epilogue. The original book was published in the Netherlands, not in the United States. Therefore it has reached only a negligible US audience and has sadly escaped the attention of many interested in Piaget's developmental theory. This challenge to Piaget's theory is an invaluable resource for cognitive, developmental, and educational psychologists.
Before Memmo my notes were scattered across PDFs. Now a workspace pulls everything into one place — I see exactly what's still left to study.
Memmo's summaries are gold before exams. I don't have to re-read 800 pages two weeks before — just the important parts.
The AI chat has saved me the night before an exam more than once. I just keep asking until I get it — no waiting on a study group to reply.
The quizzes hit exactly what I need to know. Memmo tracks what I get stuck on — so I only practice what's worth it.
Flashcards with spaced repetition are magic. Memmo knows when I'm about to forget something and brings it back.
The AI podcasts are my favorite. I listen on my way to school and get a recap without sitting at a computer.
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