It is often hypothesized that prior knowledge strongly predicts learning performance. It can affect learning positively mediated through some processes and negatively mediated through others. We examined the relation between prior knowledge and learning in a meta-analysis of 8776 effect sizes. The stability of individual differences, that is, the…

Some of the problems in research on aptitude treatment interactions (ATIs), are discussed. Among these problems are the inconsistency and lack of generality to many ATI findings, especially in classroom-based ATI investigations. It is suggested that such investigations may be of limited generality due to the nature of the phenomena. The importance…

Maps or graphical browsers of structural knowledge allow the user of a hypertext system to navigate from node to node through the structure as they portray the links between concepts spatially. This study examined the results of using two different graphical browsers that provide different amounts of information about the structure of the…