This study investigated the extent to which certain aspects of the structure of a learner's memory following instruction corresponded with the structure of the instructional material. Content structure was represented using digraph theory. The digraph analysis revealed a formal structure built substantially on six specific concepts. Cognitive…

The purpose of this study was to compare the level of concept attainment achieved by students enrolled in a Physical Science Study Committee (PSSC) physics course with that achieved by students enrolled in a traditional high school physics course. A sample of 265 PSSC students and 219 enrolled in the traditional course participated. The instrument…

The purpose of this study was to investigate the degree to which teacher identified noncollege bound high school biology students have developed the ability to identify and to apply selected princepts of biology. To investigate this a multiple-choice test was developed that measured the ability to identify and apply selected princepts of biology.…

This study attempted to ascertain if the elements perceived in the physics concepts of mass and weight differed for students of different cultural backgrounds. Responses of two matched groups of 19 students each, one from the United States and the other from Taiwan, were studied; students were given word association tests and a physics problem set…

Three assumptions formed the basis for the study: that formal mental operations are expressed by the formation of concepts; that the psychological principle of conservation characterizes the final step in concept formation; and that the attainment of conservation enables the individual to perform the hypothetico-deductive reasoning required for…