Good readers use metacognition, or actively monitoring their own comprehension, while reading. This allows them to recognize when they do not understand something and take steps to resolve gaps or confusion. Specifically, good readers make predictions, form mental images, draw comparisons to other knowledge, regularly check their understanding, and are willing to re-read or look up unfamiliar words to improve comprehension rather than ignoring problems. Poor readers do not actively monitor their understanding and may continue reading while still confused.