From the Authors Once an Olympic skier makes a downhill run, it is over. Once a concert artist performs a solo, it is done. For a sculptor who completes a piece of work, it becomes a finished monument to the effort that inspired it.
New features emanate from recommendations of students and colleagues.
The two of us are more skilled and learned than we were when set out to compose the first edition. Where possible, we draw upon our experiences. We are purposely redundant on occasion, because experiences have taught us that certain things need to be said more than once. We have included recommended readings at the end of each chapter, and an expanded glossary for quick reference and study. We have added sections on important areas such as gathering data from young children, working with persons of other languages or cultural traditions, and conducting surveys via the Internet.