This article was recommended at a talk I attended. The full title says it all.
Joseph P. Simmons, Leif D. Nelson, Uri Simonsohn. False-Positive Psychology. Undisclosed Flexibility in Data Collection and Analysis Allows Presenting Anything as Significant. Psychological Science. Vol 22, Issue 11, pp. 1359 – 1366.<U+00A0> Available in html format or pdf format.
