GERMANY REVERSES FLYNN EFFECT DUE TO DYSGENIC IMMIGRATION AND REPRODUCTION (the

GERMANY REVERSES FLYNN EFFECT DUE TO DYSGENIC IMMIGRATION AND REPRODUCTION

(the authors don’t say that but it’s obvious)

A reversal of the Flynn effect for spatial perception in German-speaking countries: Evidence from a cross-temporal IRT-based meta-analysis (1977–2014) Original Research Article Pages 145-153, Jakob Pietschnig, Georg Gittler

• Spatial perception scores decreased from 1977 to 2014 in German-speaking countries.

•We observed an inverse u-shaped trajectory of IQ test score changes.

•Changes remained robust when controlling for age, sample type, and sex.

•Decreasing performance may be due to decreasing psychometric g.