Cognitive Prostheses

The sense-represent-plan-act picture is a heroic one, but it is biologically implausible. I don't need to memorize the layout of the physical environment around me — this desk, this room, this city, this country. After all, the desk, room, city are there before me and we are built — through evolution — to have ready sensory access to it. Shut your eyes. Can you remember the detailed layout around you? It turns out that beyond the broad outlines — the basic schematic organization of what is...

 Experimental Methods for Understanding Babies

But why should you believe us instead of those benighted experts who thought babies couldn't really see? How can we say we actually do know what babies think? With the help of videotape, scientists have developed ingenious experimental techniques to ask babies what they know. One whole set of techniques has been designed to answer two simple questions: Do babies think that two things are the same or different? And if they think they're different, do they prefer one to the other? You can prese...

 Sitters and Rovers

Once you know about sitters and rovers, you see them everywhere, especially among young children. Drop in on your local Mommy and Me music class: there are the sitters, intently watching the action from their mothers’ laps, while the rovers march around the room banging their drums and shaking their maracas. Relaxed and exploratory, the rovers have fun, make friends and will take risks, both rewarding and dangerous ones, as they grow. According to Daniel Nettle, a Newcastle University evol...