Carl tends to act on whims. He has no stable set of beliefs, no coherent plans for his future, and is not attempting to develop any. He just sort of "lives for the moment." He is best described as having an identity status of .

identity diffusion                      

Explanation:

In psychology, a psychologist named James Marcia introduced the theory of identity development and said that there are four distinct stages or statuses of an individual's identity including diffusion, achievement, foreclosure, and moratorium.

Identity diffusion: The term "identity diffusion" is described as a process through which an individual tries to understand "who the person is". Identity diffusion generally occurs during adolescence in which the person hasn't figured out his or her social identity or well-defined personality traits as well as hasn't been indulged into seeking that.

In the question above, Carl is best described as having an identity status of identity diffusion.

answer; lorenz;

i believe the answer is: description

description refers to the goal of psychologist to identify the phenomenon that being observed. this goal is being actualized by collecting data/information from various clues that observed through the phenomenon. this goal must be accomplished before pyschologist able to create methods of treatment.