True verbal ability is a social behaviour. used as a tool in our remembering and thinking. it enables us to think about very complex and abstract issues by encoding them as words and then manipulating the words according to logical rules. We often encode information in memory verbally. Psycholinguistics: a branch of psychology devoted to the study of verbal behaviour. concerned more with human cognition than with the particular rules that describe language. When we speak to someone, we produce a series of sounds in a continuous stream, punctuated by pauses and modulated by stress and change in pitch. Sentences are written as a set of words with spaces between them. We say sentences as a string of sounds, emphasizing (stressing) some, quickly sliding over others, raising the pitch of our voice on some, lowering it on others. A regular rhythmic pattern of stress is maintained.