How do humans develop the capacity to reason? In five studies, we examined infants'
emerging ability to make exclusion inferences using negation, as in the disjunctive syllogism …

Preschoolers struggle to solve problems when they have to consider what might and might
not happen. Instead of planning for all open possibilities, they simulate one possibility and …

Psychologists disagree about the development of logical concepts such as or and not. While
some theorists argue that infants reason logically, others maintain that logical inference is …

The capacity for logical inference is a critical aspect of human learning, reasoning, and
decision-making. One important logical inference is the disjunctive syllogism: given A or B, if …

Can preverbal infants utilize logical reasoning such as disjunctive inference? This logical
operation requires kee** two alternatives open (A or B), until one of them is eliminated (if …

In three studies, children aged 22 to 46 months (N= 180) needed to integrate pointing
gestures or gaze cues with positive and negative facial expressions to succeed in an object …