This text uses the same conceptual, intuitive approach ofBasic Statistics for the Behavioral Sciences,but eliminates extensive reference material and advanced or obscure statistical methods.Essentialspresents only the procedures undergraduates need for reading research literature and conducting their own studies. New terms are integrated with more difficult concepts in an accessible, non-threatening format that provides concise explanations, creating a foundation and making further elaboration easier to understand. A Quick Reviewsections revisit concepts, provide worked-out examples, and help students check comprehension through review questions. Computational formulas appear in color throughout each chapter and key terms are highlighted, reviewed in the chapter summary, and listed in a key terms section.