Abstract

I offer an account of theories useful in addressing the question of whether children are young theoreticians whose development can be regarded as the product of theory change. I argue that to regard a set of propositions as a theory is to be committed to evaluating that set in terms of its explanatory power. If theory change is the substance of cognitive development, we should see patterns of affect and arousal consonant with the emergence and resolution of explanation-seeking curiosity. Affect has largely been ignored as a potential source of support or disconfirmation for the “theory theory” of development.