My surgery went fantastically well, and a quick series of self-tests performed while still in my hospital bed confirmed my belief that cognitively, I was completely intact.

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Yet, despite the great success of its education system, Singapore has been reforming it to lay less stress on rote-learning and repetitive tests and more on self-expression.

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Unlike the broad traits supposedly assessed by personality tests, self-control struck Mischel as potentially measurable.

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After completing the unscrambling task, the students took several tests of self-control.

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But placing too much faith in tests will ultimately be self-defeating, creating a more narrow curriculum and a culture of teaching to the test that goes against the higher ideals of our public education system.

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"Our next step is to fabricate a complete self-powered pacemaker and examine it with animal tests, " wrote Dr. Karami in an email.

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Ashton said the defeat - his 10th in 21 Tests since taking over from Andy Robinson - had not affected his self-belief.

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We have to produce the self-healing agent in huge quantities and we are starting to do outdoor tests, looking at different constructions, different types of concrete to see if this concept really works in practice.

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