What is Meta-analysis? Meta-analysis is a statistical analysis that assesses and combines the results from previous research to derive conclusions about the body of that research. Why must researchers use Comprehensive Meta-Analysis (CMA) software? A CMA is an indispensable tool for efficient problem-solving in meta-analyses. This CMA software is extremely easy to use and understand, and lead the researchers to the world of meta-analysis quickly. This special book with CMA software can be used to guide the researcher to the right procedure of meta-analysis and straightly to have a good convincing result presentation. Moreover, this book aims to expose and enhance the knowledge of the researchers about the comprehensive meta-analysis and the users of the software. Besides that, the book is easily compiled and written in simple language, which is easy for the beginner users to understand. The most interesting aspect about this book is, it Introduces a variety of analysis types with a very detailed step-by-step so that it can serve as a guide for researchers in planning selecting appropriate analysis in their research studies.