One of the models how such weeding might happen is that you want some precentage of the students to fail. If you apply pressure the breaking point is reached faster. Making a change that helps everybody makes it so that you have to compare higher performance levels which is often harder than comparing low performance levels.
One of the models how such weeding might happen is that you want some precentage of the students to fail. If you apply pressure the breaking point is reached faster. Making a change that helps everybody makes it so that you have to compare higher performance levels which is often harder than comparing low performance levels.