Since the dawn of this century IQ Test has spread to all of the worlds. The IQ test is cheap. In most cases, it is accurate to predict one performance in an industrial society. But can IQ change? The good news is IQ can change because our brain is more like plasticine rather than stone.

What makes these research great? These research provide four local evidences and one global evidence that IQ is dynamic and changeable, not static nor fate.

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