Multiple Choice Tests; *Photosynthesis; Science

Based on the premise that multiple choice tests can be used as diagnostic tools for teachers in identifying and remedying student misconceptions, this study focused on. the development of an instrument for diagnosing secondary students ' understanding of photosynthesisand respiration. Information is presented on: (1) procedures of development of the two-tier instrument for assessing students ' understandings of photosynthesis and respiration in plants; (2) test results based on administration to_students of secondary schoels from Perth, Western Australia; and (3)_application possibilities for teachers in a classroom setting. Propositional statements representing the knowledge required to comprehend the mechanisms of photosynthesis and respiration are listed and sample questions from the instrument are included. Also identified are representative students ' misconceptions from a series of pilot studies on photosynthesis and respiration in plants. (ML) Reproductions supplied by EDRS are the best that cap be made from the original document. Pr% co t=