Generally, gifted or advanced students learn more quickly, deeply, and broadly than their peers. They may talk early, learn to read early and progress at the same level as normal children who are significantly older. Gifted students also tend to demonstrate high reasoning ability, creativity, curiosity, a large vocabulary, and an excellent memory. They can often master concepts with few repetitions. They may also be perfectionistic, and frequently question authority. Some have trouble relating to or communicating with their peers because of disparities in vocabulary size (especially in the early years), personality, interests, and motivation. As children, they may prefer the company of older children or adults. Teachers may notice that gifted students tend to hover around them more than the other students. This is because gifted students sometimes do not think that they can relate to the students their own age, so they try and communicate with the teacher.