>>19 >> I can say a few things about the aptitude to work as a clinical psychiatrist, but I can't help you much in terms of the Myers Briggs type indicator. When I first heard about it years ago I had to look it up because it isn't too well known in my field. The MBTI seems to be fairly popular in the US, but it is hardly used at all in my country, and if it is, it's mostly for certain professional assessments (e.g. in coaching).
To be honest, I don't think too highly of the MBTI because it doesn't meet the standards of a scientific personality test. First, it derives its conclusions from C. G. Jung's theory of personality types which is considered outdated in its rigid and quite simplistic original form. It's acknowledged as the historic root of other modern theories about personality psychology, but that's it.
That aside the MBTI itself doesn't fulfil the requirements of a scientific psychological test. There are three main criteria for scientific psychodiagnostic measures in general: objectivity, reliability and validity.
Objectivity indicates how independent a test is from its supervisor and its surroundings. A ideally objective test will produce good results no matter who conducts it and what situation the proband is in.
Reliability measures how well a test can be reproduced without producing errors. A perfectly reliable test will always produce the same results for the same test person regardless of the circumstances.
Validity assesses how significant the test results are, i.e. whether the test actually measure the desired trait and is it possible to make a sound decision based on the test results?
The problem with the MBTI lies with its poor reliability and validity. Even if the test supervisor and the test environment remain the same and the same person is tested in the same way, their results may easily change within a couple of weeks. Such low reliability is hardly credible for a personality test.
In terms of the test's validity, among the 16 allegedly unique personality types certain groups resemble each other so much and specify so little - which is also the reason why people often don't identitfy with their declared type - that the results cannot be regarded as of significant value. Plus, the test is unable to take many behavioural patterns into account that do not fit its factors' binary scheme.
In conclusion, the Myers-Briggs personality test is good if you want to have some fun with pseudo-psychological tests, but for important decisions like career choices, you'd better stick to your own judgement, for the MBTI won't produce any stable or significant results.
For further reading on the difficulty concerning the MBTI:
Nothing personal: The questionable Myers-Briggs test (newspaper article)
Measuring the MBTI... And Coming Up Short (scientific explanation)
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So after this long explanation on the MBTI, here's my own opinion on what you need in order to be suitable to become a psychiatrist or a clinical psychotherapist.
In contrast to the common belief that psychiatrists are almost as mentally strange as their patients, scientific evidence has shown that the average professional in this field is more mentally healthy and stable than the average citizen.
Personally, I agree that psychiatrists have to be really resilient in order to stay as calm, understanding and discriminate as they're required to be. Working with people whose illness has altered their mind and original behaviour and that you often cannot hope to cure, sometimes as young as 11-year-old children who talk about not seeing any meaning in living, dealing with failure which may result in suicide or the complete loss of cognitive abilities and witnessing these consequences...
As a psychiatrist, you've got to cope with all these possibilities and more every single day and still keep your cool without letting your sensitivity grow dull, so you yourself won't be ruined. This profession is both tough and gratifying, as you can influence people's lives and often directly see the results.
Even though, I'm aiming for a similar profession that also requires you to deal with people's lives, illnesses and deaths, I don't know if I'd be able stand that kind of pressure.
Anyway, if you yourself don't feel psychologically resilient, you probably won't make it on the highly stressful educational path of a clinical psychiatrist or psychotherapist. You'd better go for other psychological fields like industrial psychology which don't involve the same kind of responsibility.
Apart from these psychological requirements you also need intelligence and a lot of perseverance to dig through the long years of studying, training and specialisation. Some interest in Statistics and Sciences like Biochemistry would be favourable, for you'd have to learn a lot about neurophysiological and pharmacological processes. Oh, and some social skills would be good, too ;)