Introductory Biology Test (IMAGE) Arizona State University Caption Over a three-year period, researchers looked at 87 introductory biology exams taught by 26 instructors at a public research university and they included over 4800 students in the analysis. Credit Sandra Leander Usage Restrictions with photo credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.