This is not to say that one person cannot have needs spanning all three categories. A person may have the need for affiliation at the same time they have the need for power. While this may initially seem contradictory, there are instances where both needs can be fulfilled. Also, timing may connote different strengths of needs at different moments. So, while a person may strongly feel the need to affiliate during times of loneliness, they may at another time feel the strong need for power when instructed to organize an event. Needs may arise and change along with a change of context.