
The NY Review of Books examines James
Wood et als book: Whats Wrong with the Rorshach?: Science Confronts the Controversial Inkblot Test ... (subscription required) ... Hermann Rorschach invented the idea of an inkblot test in 1921, and it soon became embedded in our cultural psyche. A student of Freud and Jung, Rorschach developed a set of ten seemingly formless bisymettrical inkblots on cards, and a methodology to interpret what patients saw when exposed to the cards. The goal was to produce an experience type (Erlebnistypus) that would lead in part to a clinical diagnosis.
The object was to somehow peer into the operation of the brain, without surgery and before fMRI techniques. A bit of post-victorian science-as-classification.
The book portrays Rorschach as a crank and the test as deeply flawed. Most damning from an analysis point of view, Rorschach and his followers did a very inadequate validation of his classification approach. Nowhere close to statistical significance. It drips with confirmatory bias, and that bias has a strong negative slant. Yet 80 percent of clinical Phd psych programs still emphasize the slant. Why still support what seems to be pseudo-science? Under fire: The International Rorschach Society.
The inkblot tests also reminds me of techniques used by research groups who use choices of pictures to reveal underlying consumer thinking.
This also links to the newly emergent techniques of Neuromarketing (For recent intro see MSNBC article) There MRI techiques are used to collect patterns of blood flow in the brain after people are exposed to stimuli. These patterns are then linked to known behavior. Although I would hope the people developing these techniques know more about classification validation than Rorschach did, there is a clear danger of finding pattern that is not there. (Pareidolia)
Also, look at the Amazon reviews of this book, this is apparently a very polarizing book among the psych community. There are other posts out there about how much is wrong with this book.


This reminds me of Edward Tufte's 
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