Originally published in 1971, this book was a critical introduction to the psychology of human development, learning and assessment. It was written with special attention to the needs of students of education and teachers, keeping in view the practical implications of psychological evidence. The author's purpose was to provide a clear and straightforward account of these matters, while at the same time promoting a thoughtful and critical response. If the book is to be called a textbook, it is so in this best sense.