This article describes the design, implementation and evaluation of digital learning material on the social--psychological Theory of Planned Behavior (TPB) and its use in nutrition behavior research. The design is based on guidelines derived from theories on instructional design. The major component of the design challenge is to implement three…

This study applied evaluation techniques to "Cesar" (a hypermedia learning environment for deaf children based on electronic stories) and "Hyper-Book" (an electronic book based on the paper book metaphor and designed to be part of an electronic library). It also identifies steps that can be used in evaluating electronic books…