Firstly, psychologist John Raven and psychoanalyst John Bowlby developed tests of mental ability, which were different from, but used in conjunction with, intelligence tests. Secondly, there was a ‘Leaderless Group test’. This came from an unnamed Military Testing Officer, and had psychological theory grafted to it by Wilfred Bion. Thirdly, there were ‘Psychological Pointers’ like Word Association Tests and questionnaires about candidates’ backgrounds and medical health, both of which were intended…
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