"
Whether or not this ""textbook"" issue is used is a besides the point.  In the current form the use of the source is drawing conclusions in Wikipedia's voice that is poorly supported. The SPE is a classic study in psych 101, and it certainly bears mentions somewhere in the article.  Do we need to mention that the textbooks adequately (or not) criticise the methodology?. I don't know.Makin'Bacon "