Could you please purchase the textbook "Introduction to Mediation, Moderation, and Conditional Process Analysis: A Regression-Based Approach" by Andrew F. Hayes (released May 2013; see http://www.afhayes.com/introduction-to-mediation-moderation-and-conditio...)?

As well as being likely to set the standard for the cutting edge of mediation and moderation analyses in the social sciences (including bootstrapping), the book is the companion to the PROCESS macro for SPSS, which is becoming a widely used statistical tool in analyzing regression-based causal process models.

Regards,
Stephen La Macchia, PhD student
School of Psychology.