Question: Two high school biology classes were selected for an experiment on instructional strategies. Class 1 received Method 1 and class 2 received Method 2. Before the experiment commenced, students’ IQ scores were collected so IQ could be used as a covariate in the statistical analysis to follow the experiment. After students were exposed to instructional methods for one

semester, a posttest to measure biology achievement was administer to all students. Below is a table of results from this experiment. Method 1

ANCOVA will be used to analyze these data. In which direction will posttest mean scores for Method 1 be adjusted if an adjustment occurs? In which direction will posttest mean scores for Method 2 be adjusted if an adjustment occurs?