This textbook, Advising on research methods: A consultant’s
companion, has been written for those who give advice on research
methods in the social and behavioral sciences, including medicine and
epidemiology. It aims to assist researchers in the field to
produce better – more accurate, valid, and reliable – results.

Herman J. Ader has been a statistical consultant for many years at VU University in Amsterdam first at the Psychology department, later at the
VU Medical center. With Don Mellenbergh, he has given numerous courses on
Methodological advising using the present book as material.

Gideon J. Mellenbergh is emeritus professor of Psychological Methods at the Department of Psychology, University of Amsterdam. He has a long-standing experience in methodological consultancy in different fields, such
as clinical and health psychology, industrial and organizational psychology, educational research, social dentistry, and psychiatry.

David J. Hand is Professor of Statistics at Imperial College, London, UK.
He has wide-ranging consultancy experience to organizations ranging from banks, through pharmaceutical companies, to governments. He has published fifteen books, and is the founding editor and continuing editor-in-chief of the journal of Statistics and Computing.