This book results from a research master course Methodological Advice that was given at the University of Amsterdam at the end of the year 2015. The objectives of this course are: (1) to acquire methodological knowledge that is needed for advising researchers in the behavioral and social sciences, and (2) to get experience with methodological consultancy.The students got various assignments, one of which was to write a paper on a topic that may come up during methodological consultancy.Paper topics were selected from a long list of relevant methodological issues. The intended audience of the book are fellow research master students who give methodological advice on research in the behavioral and social sciences, such as is done in Methodology Shops of Dutch psychology departments.The book is the fifth in a series of similar booklets.