IQ SCORES

means. Some researchers argue that people are not getting more intelligent overall, but just getting better at a particular sort of problem solving. Others say they have found echoes of rising IQ scores in 'real world' measures of intelligence. To confuse things still more, there are hints that the trend may be about to grind to a halt. B James Flynn, a professor of political science, first showed that IQ scores were rising in the mid-1980s, and became famous after others ddubbed the pattern he had observed the 'Flynn effect. In a landmark paper he made detailed comparisons across fourteen countries of trends in the results of tests that measure reasoning power. Overall, these showed a real growth in scores of up to 25 points in a generation. To find out more, Flynn went on to look at scores for each type of reasoning that IQ tests set out to measure, such as verbal, numerical and visuo-spatial. This last test category usually includes 'Raven's matrices' - sequential patterns with one piece missing. The candidate has to choose, from a set of alternatives, which shape to put in the empty space. When Flynn took a closer look at the scores, the pattern was clear. The strongest gains in almost every case were on Raven's…