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At ISIR 2025, we have Kayla Garner (Northwestern University) presenting on spatial cognition and geographic and contextual indicators. Past research has shown that geography is important for developing spatial ability. Growing up in rural areas and in more chaotic street…

Audrey Scudder (University of Connecticut) is presenting a systematic review of IQ score discrepancies across test batteries in autistic youth. Many children with autism have uneven cognitive profiles. They are also more challenging to test than typically developing children.…

The first presentation of today at ISIR 2025 is from @clairlemon (founder of @Quillette), who is receiving the Constance Holden Award for Distinguished Journalism.

Hello from the final day of the annual conference of the International Society for Intelligence Research (ISIR)! @Russwarne will be tweeting summaries of each presentation so you can learn about the news from the world of intelligence research!

At ISIR 2025, we're now hearing from Maximilian Krolo (Saarland University), who is presenting research on political interest and voting behavior of gifted adults in Germany. The study uses a longitudinal sample of 151 children with IQs of 130+ and a comparison group of 136…

Gunhild Tidemann Okholm is presenting more data from the Danish population registry again. The title is "The impact of depression on age-related cognitive changes over more than 40 years." The study follows up on men who took an IQ test at age ~18 as part of the requirement for…

Gunhild Olkham, Martin Stolpe Andersen, and Rebecca Beatrix Clarke (University of Southern Denmark) are presenting the next talk, which is about the development of cognitive ability. There are two goals in this study: (1) Use existing data to create a proxy of IQ so that they…

We're back from lunch at ISIR 2025! Next presentation is from Gunhild Tidemann Okholm, who is presenting about the association between IQ and health outcomes. Okholm uses Danish conscript data (from >90% of Danish men) to determine whether IQ predicts health outcomes. Some of…

Next presentation a ISIR 2025 is Michael Woodley, with a presentation titled "Evidence that phenotypic g is both formative and reflective from four, large genetically-informative samples." "Reflective" means that g is an entity reflecting genetic and environmental causes…

The next presenter at ISIR 2025 is @Kirsten_Hilger, whose presentation is called "Intelligence adnt he P300 event-related brain potential: Results of a systematic review and meta-analysis." Hilger is interested in how EEG characteristics (i.e., brain wave data) are associated…

Next ISIR 2025 presentation is from Gabriella Noreen (Vanderbilt University). The topic is career, family, and time allocation in high-IQ individuals. (The data come from the SMPY sample that we've tweeted about before.) She explores a paradox: women earn more college degrees in…

The first ISIR 2025 presentation of the day is from David Geary (University of Missouri), whose presentation is called "The nurture of nature: Why sex differences are larger in healthy and wealthy nations." Geary presents an evolutionary psychology model based on sexual…

Nathan Kuncel (University of Minnesota) is giving the next ISIR 2025 presentation. It's titled "Cognitive predictors of medical resident performance: A meta-analysis." The study investigates both how job performance is measured in medical residents and the predictors of that job…

Next ISIR 2025 presentation is from Saima Ghazal (Missouri University of Science & Technology) and is called "Parallel forms of the Berlin Numeracy Test: A Step Toward Measurement of Risk Literacy Development and Change." Numeracy matters because it can help people understand…

The final Flynn Effect presentation is by Sandra Oberleiter (University of Vienna), who is presenting a meta-analysis on 116 years of data on the Flynn effect. Oberleiter suggests that one influence on the Flynn effect is that items gradually getting easier or harder (called…

Pietschnig is back, this time presenting on the Flynn Effect of the Trail Making Test (TMT). (Pietschnig's presenting in the place of his student who has long COVID.) The TMT is widely used in studies of executive functioning, mental speed, cognitive aging, and other topics.…

The 2nd of 4 Flynn effect presentations at ISIR 2025 is by Alina Bugelnig (University of Vienna), who is studying the Flynn Effect in Austrian conscripts from 2010 to 2022. Bugelnig used data from a German-language test of attention, visual discrimination, and processing…

At ISIR, Jakob Pietschnig (University of Vienna) is presenting on the Flynn affect in Austrian students between 2009 and 2024. This is the first of 4 consecutive presentations about the Flynn Effect. Pietschnig opens provocatively: "I now think that we have been doing Flynn…