Kindergarten and first grade children were trained to choose the middle-sized stimulus in either a single stimulus set or in each of two nonoverlapping stimulus sets. Findings were reported in terms of the assumption that cognitive processes are important in the intermediate-sized transposition paradigm. (Author/DB)

Cognitive effects in children's learning of altruistic behavior were tested with an adaptation of Aronfreed's test design and machine. Children in grades 1-4 were presented with a machine with 2 levers. One lever, when pressed, released bubble gum, and the other turned on a light. For two of the three groups the experimenter exclaimed delightedly…

The effects of observing a model and of providing a response rule on the learning, transfer, and retention of a dial-reading, numerical concept were studied in 144 third-graders. Different experimenters conducted the immediate learning procedures versus the measurements of retention. No extrinsic reinforcers were promised or dispensed. The…