{ "item_title" : "The Essential Guide to Effect Sizes", "item_author" : [" Paul D. Ellis "], "item_description" : "This succinct and jargon-free introduction to effect sizes gives students and researchers the tools they need to interpret the practical significance of their results. Using a class-tested approach that includes numerous examples and step-by-step exercises, it introduces and explains three of the most important issues relating to the practical significance of research results: the reporting and interpretation of effect sizes (Part I), the analysis of statistical power (Part II), and the meta-analytic pooling of effect size estimates drawn from different studies (Part III). The book concludes with a handy list of recommendations for those actively engaged in or currently preparing research projects.", "item_img_path" : "https://covers4.booksamillion.com/covers/bam/0/52/119/423/0521194237_b.jpg", "price_data" : { "retail_price" : "133.00", "online_price" : "133.00", "our_price" : "133.00", "club_price" : "133.00", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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