What Do Philosophers Do?
Philosophers are concerned primarily with finding and judging reasons for assertions. Thus they conduct the most general study of reasoning, knowing and valuing. Accordingly, philosophers develop the following skills:

thinking and writing clearly
reasoning correctly
verbally defending a viewpoint
analyzing and solving problems
pointing out unrecognized assumptions
handling theoretical structures
investigating the relations among concepts
understanding the structure of contemporary knowledge
respecting tolerable ambiguities
locating the rational grounds for disgreement
understanding the nature and structure of science
detecting values and problems in great thinkers of the past and present

What Do Psychologists Do?
Psychologists are engaged in the systematic study of behavior and the nature of conscious experience. The interests of psychologists are quite wide ranging. There are many areas of specialization including the study of: learning, memory, language, sensation, perception, emotion, motivation, brain and behavior, personality, development, intelligence, and social interaction. Other types of interests are expressed by the various approaches to science taken by psychologists. Some contribute primarily to research and theory. Others stress the application of theory and research toward seeking solutions to social concerns and improving the quality of life. Accordingly, psychologists develop many of the same skills that philosophers do and in addition must receive a thorough grounding in research and statistical methodology.

A Demanding Major
The joint major is a demanding program of study because to be clear about the interrelationships between philosophical and psychological perspectives one must have a good mastery of the concepts and methods of the separate disciplines. This entails that the courses central to the professional identities of the two disciplines should be taken, and
these courses will be demanding. Such consequences are unavoidable if inter-disciplinary work is to be significant, but, then, little that is easy is rewarding. The rewards of the joint major are dual; not only is it a stimulus to personal growth by enlarging one's awareness of alternative points of view, it is also a firm foundation for advancing career prospects.