The use and analysis of student generated propositions linking two scientific concepts (photosynthesis and respiration) were examined before and after the study of photosynthesis. A proposition-generating task (PGT) was used as a diagnostic tool to indicate student misconceptions and partial understandings. Focus was on determining: how the nature…

An investigation of biology matriculation tests in Israel was undertaken to assess the use of justifications with multiple-choice items and to compare the effect of three item formats on students' performance. More specifically, the study was designed to determine the: (1) extent to which justifications will differ if the correct answer is made…