Guest guest Posted April 5, 2001 Report Share Posted April 5, 2001 > > I dont think anyone > > ever " assumes it is all genetic " - if it were, the concordance for > > schizophrenia in identical twins would be 100% and it is not. > > However, > > there is a very high degree of heretibility. > But that still does not answer the question as to whether it can >come into > being without an insane environment. Since I'm not familiar with >the details > of the studies, I have to ask, where the identical twins reared >together or > apart? Was living together until two or three counted as not living > together? The basic concordance and heritability stats are just done with whoever happens to be handy, which of course will almost always mean kids who were reared together. Heritability represents a comparison of the difference in concordance between identical and non-identical twins, and it is high for schizophrenia. Of course, an obvious confound here is that identical twins are likely to be treated much more similarly than non-identical ones. I once asked in a lecture if the non-identical sample was restricted to same sex twins, as identical ones are always same sex, and hence the different genders of 50% of non-identical pairs is a very obvious confound quite over and above the fact that identical ones are much more alike generally. The lecturer didnt know the answer, and got very uncomfortable and even angry that I asked the question, and said " Well they could restrict the sample to same sex pairs if they wanted to. " Well of course they could - my question was whether they had actually done it. This confound is so obvious and so easily eliminated that I cant believe that they didnt actually do so (but then maybe I'm giving them too much credit), but what is of great interest here is that the psychology lecturer whose business is to know such things didnt know the answer but was still trotting out the heritability statistic as if she was fully conversant with all the validity issues associated with it. What this to me reflected is that the high heritability of schizophrenia has now become such a given that it is more or less accepted by the experts without even remembering the underlying assumptions - and that of course, is dangerous. I cant say for certain that the question of separate rearing hasnt been addressed but the combined rarities of twins, schizophrenia, and separate rearing while remaining traceable have probably rendered such studies impossible, though they have been done with regard to general psychology. > Is it possible that the children who will become schizophrenic are > identifiable because the damage has already been done? Of course. However, many of the stressors that ppl give as reasons why individual ppl become schizophrenic are often late in childhood and may even be at the time the schizophrenia appears, as you yourself suggested when you referred to the " environment that brought the schizophrenia about " . > One thing > psychiatrists and other medical people are famous for ignoring is >the effects > of growing up with mentally ill people in authority. REALLY? I think not. As in the US most psychoanalysts are MDs, then isnt in fact true that they are notorious for claiming that ppl suffer as a result of the actions of their parents? > Or perhaps [Pete's schizophrenic friend's] hallucinations and >delusions are a symbolic recounting of actual experience. Indeed - intriguing and disturbing quandary, is it not? > You mean that the small child who is easily identifiable by even lay >persons > as to become schizophrenic is causing insanity in the family that >would > probably also be readily visible to the lay person if the stage were > otherwise set? While I dont agree with Rita's criticisms of your arguments, one annoying habit you do have is expressing an idea in hyperbolic terms in order to attack it. I didnt refer to " causing insanity " and in fact I didnt refer to family dynamics before the person developed full-blown schizophrenia. I dont actually know the stats, but I doubt that ppl identified the incipient schizophrenic kids with total accuracy - it was just above average by chance alone. They wont have been easily identifiable if they didnt know that some of the kids they were looking at were *definitely* going on to be schizophrenic - otherwise we'd be realizing which kids would go that way all the time. Hence, the kids' behavior probably wasnt all that different from the normal kids, and also, the lay ppl could go by appearance as well as behavior. Since the kids' behavior wasnt all that unusual and in fact no-one in the family actually realized that anything was wrong, there is no reason to think that the family would look all that unusual at the time. However, when as a teen they went schizophrenic, that would cause a nightmnare for the family that would throw it totally out of kilter. Liberal therapist/writer gets to see possibly heartbroken, frightened, traumatised, and exhausted parents who may have partly or totally given up all hopes for their kid and concludes that this " schizophrengenic " demeanour was what caused the schizophrenia when in fact beforehand they may have just been fairly average, imperfect parents. > I know nothing about autism except stories of the harm that the " refrigerator > > mother " theory caused as a discount of the theory. Knowing nothing >about it, > I can't comment on it either way except that there seems to be a >great deal > of glee and illogical extension of one particular psychiatric >disorder to > virtually all psychological disorders. Well one thing that might interest you is that it used to be called " infantile schizophrenia " before it was found out to be something different. I would say that the glee (combined with righteous indignation) and illogical extension of one particular psychological disorder to virtually all psychological disorders is exactly what yourself and other psychiatry skeptics do when they point to the failings of one aspect of psychological theory and practice ( e.g. regarding alcoholism/addiction) and hence decide that all of it must be a total crock. The tragedy of this is that you might win a lot of hearts and minds of the medical profession with regard to alcoholism/addiction - if you didnt totally lose it again when attacking areas where there is widespread agreement that the psychiatry is sound. P. Quote Link to comment Share on other sites More sharing options...
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