Chapter 1 Excitatory and Inhibitory Influences on Reflex Responsiveness, Frances K. Graham, Barbara D. Strock, Bonnie L. Zeigler; Chapter 2 Two Kinds of Perceptual Organization Near the Beginning of Life, Marc H. Bornstein; Chapter 3 Constraints on Structure: Evidence from American Sign Language and Language Learning, Elissa L. Newport; Chapter 4 Comparative Cognitive Research: Learning from a Learning Disabled Child, Michael Cole, Kenneth Traupmann; Chapter 5 Intrinsic and Extrinsic Motivation in Children: Detrimental Effects of Superfluous Social Controls, Mark R. Lepper; Chapter 6 A Model of Mastery Motivation in Children: Individual Differences and Developmental Change, Susan Harter;