Preface
The “new statistics” of this book's title are not themselves new, but adopting them as the main way to analyze data would, for many students and researchers, be new. It would also be an excellent development. Let me explain.
“Children in the new program made significantly greater gains, p < .05.” In many disciplines, that's the standard way to express a conclusion. It relies on null hypothesis significance testing (NHST), which uses p < .05 or p < .01 to establish a result as statistically significant. However, NHST is a very limited way to analyze and interpret data, because it focuses on the narrow question, “Is there an effect?” Other disciplines, including physics and chemistry, seldom use NHST, and usually report results as ...
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