Another nation in which the Flynn effect (IQ in Romania was increasing with approximately 3 IQ points/decade) seems to reverse: The continuous positive outlook is in question as modern generations show signs of IQ “fatigue”

Time and generational changes in cognitive performance in Romania. George Gunnesch-Luca, Dragoș Iliescu. Intelligence, Volume 79, March–April 2020, 101430. https://doi.org/10.1016/j.intell.2020.101430

Highlights
•    The Flynn effect can be also observed in Romanian samples.
•    IQ in Romania is increasing with approximately 3 IQ points per decade.
•    Both period and generational effects contribute to the overall effect.
•    The continuous positive outlook is in question as modern generations show signs of IQ “fatigue”.

Abstract: The Flynn effect describes sustained gains in cognitive performance that have been observed in the past century. These improvements are not evenly distributed, with strong variations across regions or groups. To this effect, we report time and generational trends in IQ development in Romania. Using pooled repeated cross-sectional data ranging from 2003 to 2018 (N = 12,034), we used Hierarchical Age-Period-Cohort Models (HAPC) on data measured with the Multidimensional Aptitude Battery II. The results show an increase in measured performance of about one third of an IQ point per year, mainly driven by individual level effects and with additional variance attributable to generational (cohort) and period effects.

Check also Cohort differences on the CVLT-II and CVLT3: evidence of a negative Flynn effect on the attention/working memory and learning trials. Lisa V. Graves, Lisa Drozdick, Troy Courville, Thomas J. Farrer, Paul E. Gilbert & Dean C. Delis. The Clinical Neuropsychologist, Dec 12 2019. https://www.bipartisanalliance.com/2019/12/usa-evidence-of-negative-flynn-effect.html