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> Not all psychologists see eye-to-eye on the tests issue.

But psychologists don't see eye to eye on anything -- that's one of the obstacles to turning psychology into a science.

> In the case mentioned in the article, even a professional that truly trusts the tests should have taken into consideration:

> 1) make his own assesment and check against the test score,

On the contrary, if psychology were a science, a clinical psychologist administering a standardized test should produce the same high correlation with reality as a clinical doctor administering a standardized test. But this is certainly not the case, and one of the reasons for this discussion is that psychologists are often married to the outcome of a test that isn't a reliable measure of its subject. A psychologist's confidence in a test's unreliable results is an obvious theme in the linked article.

> Carefull when disregarding a whole field based on preconceptions.

Tell that to Thomas Insel, director of the NIMH, who recently and reluctantly decided to abandon the DSM, psychiatry and psychology's standard diagnostic manual, on the ground that it's becoming less scientific with each new edition:

http://www.psychologytoday.com/blog/side-effects/201305/the-...

My point is that, when a field's opinion leaders disregard a whole field, it's no longer a preconception.

> All fields have different branches and disagreements.

When a medical doctor says you have cancer, it's 99% certain you have cancer. When a psychologist says you have Asperger Syndrome, the reliability of the diagnosis is so unreliable and divorced from reality that the diagnosis has been reluctantly abandoned after an epidemic of phony diagnoses.

The same pattern applies to most other psychological diagnoses and decisions -- they are very subjective. Tom Widiger, who served as head of research for DSM-IV, says "There are lots of studies which show that clinicians diagnose most of their patients with one particular disorder and really don't systematically assess for other disorders. They have a bias in reference to the disorder that they are especially interested in treating and believe that most of their patients have."

> I think it's because of it being a young field ...

Psychology and psychologists have been around making pronouncements since before the U.S. Civil War. That makes psychology one of the oldest fields that has scientific pretensions.

> it's hard to agree on what the standards are to measure good/bad practice.

Yes, true, which is why psychology is now being replaced by neuroscience -- the latter can produce more objective results.



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