Learning means acquiring new or modifying or enhancing existing skills, values, knowledge, preference or behaviour by means of synchronising information. Learning is a process where what is already known is built up on and given a shape. Human learning occurs as part of personal development, school, training or education. The study that states how learning occurs is included in neuropsychology, learning theory and educational psychology. It may be possible that learning occurs due to classical conditioning or habituation, and with or without conscious awareness.