The Effects of Error-Flagging in a Tutor on Expression Evaluation

We evaluated the effect of providing error-flagging as support for error detection, but not error correction while the student is solving a problem. We found that providing error-flagging in addition to demand feedback during practice learning was no more effective than providing only demand feedback when the tutor did not explicitly mention that errors were being flagged. On the other hand, explaining and providing error-flagging without demand feedback during preand post-tests resulted in significantly better scores on preand post-tests even though error-flagging did not provide any error-correction support.