Beneath elements of cognitive development, motivation is seen as a basic concept to describe students' learning in a physics classroom. German secondary school students regard physics as difficult to learn, very abstract, and dominated by males. Knowing about the influence of motivation on learning physics may lead to new insights in the design of…

Developmental changes in the understanding and use of the logic of experimental control were addressed with three tasks in a longitudinal study. In all three tasks, understanding of experimental control was assessed by production measures (children were asked to test potential causal relations in a multivariable situation) and by choice/evaluation…