Method By the combined Raven's Test in China, the children's IQ values were measured in ChongQing, the volume of thyroid gland. salt iodine and urinary iodine were measured at the same time.

He does, however, have a problem-and it is one that might help to explain why, besides phylogenetic prejudice, the lizard mind has not been properly investigated before.

The measurement of individual intelligence is very difficult.