"Some research suggests that there may be an ongoing reversed Flynn effect (i.e., a decline in IQ scores) in Norway, Denmark, Australia, Britain, the Netherlands, Sweden, Finland, and German-speaking countries,[4] a development which appears to have started in the 1990s.[5][6][7][8] In certain cases, this apparent reversal may be due to cultural changes which render parts of intelligence tests obsolete.[9] Meta-analyses indicate that, overall, the Flynn effect continues, either at the same rate[10] or at a slower rate in developed countries.[11][12]"
"Some research suggests that there may be an ongoing reversed Flynn effect (i.e., a decline in IQ scores) in Norway, Denmark, Australia, Britain, the Netherlands, Sweden, Finland, and German-speaking countries,[4] a development which appears to have started in the 1990s.[5][6][7][8] In certain cases, this apparent reversal may be due to cultural changes which render parts of intelligence tests obsolete.[9] Meta-analyses indicate that, overall, the Flynn effect continues, either at the same rate[10] or at a slower rate in developed countries.[11][12]"