We conducted three experiments to reproduce and extend Perone and Courtney's (1992) study of pausing at the beginning of fixed-ratio schedules. In a multiple schedule with unequal amounts of food across two components, they found that pigeons paused longest in the component associated with the smaller amount of food (the lean component), but only…

The validity of an automated experimental system incorporating a computer mediator for resolving conflicting requests to speak among four-member problem-solving teams was assessed. Learning how to use problem-solving strategies was affected by this new method for facilitating participation in dialogue. Strategy learning among shy and assertive…

Aptitude-treatment interactions (ATIs) refer to the covariation between learner characteristic and instructional treatment in relation to some outcome measure. To systematically test for ATI, an intelligent tutoring system instructing in basic principles of electricity was chosen as a complex but controlled learning task. Two learning environments…