Today's workplace is dynamic and ever-changing and therefore requires the same of employees. Professional development, once an unknown and unconsidered concept, is now an integral part of any organization. Yi has written an insightful piece. With each passing day the demands of the workplace increase. New types of jobs are created while other types of jobs disappear. For today's graduates a four-year degree is only the beginning of a person's educational experience. Training to update knowledge and skills will be continual throughout a career. For all of these reasons this makes Yi's article timely and relevant and adds to the growing body of research on the topic of adult learning....

I expect this article will be both a basis for future research as well as a reference piece for those in the field of adult learning.
References

Driscoll, M.(1994).Psychology of learning for instruction. Boston: Allyn & Bacon.

Ertmer, P., & Newby, TJ. (1993). Behaviorism, cognitivism, constructivism: Comparing critical features from an instructional design perspective. Performance Improvement Quarterly 6 (4): 50 -- 71.

Schwen, T.M., Kaiman, H.K., Hara, N., & Kisling, E.L. (1998). Potential knowledge management contributions to human performance technology research and practice. Educational Research and Development. 46(4), 73-89.