Intelligence is a generic term for various cognitive abilities. It is classified into different components, depending on the intelligence theory (e. g. in his work "The Berlin Model of Intelligence", A.O. Jäger lists: cognitive speed, memory, creativity, and reasoning to process verbal, numerical and figural material). General features of all intelligence definitions include: quality of solution and speed in resolving completely new (i.e. non-routine) tasks, also frequently defined as 'the ability to learn'.