Common strategies used in working memory training include repetition of the tasks, giving feedback such as tips to improve one's performance to both the parents and the individual, positive reinforcement from those conducting the study as well as parents through praise and rewarding, and the gradual adjustment of the task difficulty from trial to trial. More explicitly used strategies by the individual include rehearsal of material, chunking, pairing mental images with the material, mnemonics, and other meta-cognitive strategies. The latter strategies have been learned and there is a conscious awareness of their use.