This paper describes a study conducted with Stat Lady, a computer-base
d approach to teaching and learning the rules of PROBABILITY, based on
the postulate that learning is a constructive process, fostered by an
experiential learning environment that is anchored in real-world prob
lems. This study compared learning from Stat Lady vs learning from a p
aper-and-pencil Workbook version of the identical curriculum, and addr
essed the question: ''What does the computer contribute to learning?''
Findings showed that Stat Lady learners performed at least as well (a
nd in some cases, much better) on the outcome tests compared to the Wo
rkbook group. Specifically, we found that (a) Stat Lady was clearly th
e superior environment for high-aptitude subjects, (b) Stat Lady subje
cts acquired significantly more declarative knowledge than the Workboo
k subjects, and (c) regardless of aptitude, the majority of learners f
ound the Stat Lady condition to be significantly more enjoyable and he
lpful than the Workbook condition. Implications for the design of inst
ructional systems and further research are offered.