Financial Hardship Linked to Lower IQ Scores by Age 53

Financial Hardship Was Linked to Lower Scores by Age 53 People with more exposure to low income or financial strain scored lower on both memory and processing speed by age 53, years before most people start thinking about memory loss at all. The clearest differences showed up among those who’d faced hardship repeatedly rather than just once or twice, though the study wasn’t designed to prove a single rough patch is harmless either. Years later, at ages 69 to 71, brain scans told a related story: people with a history of persistent low income had noticeably larger fluid-filled spaces in the brain, the kind that grow as nearby tissue shrinks. Interestingly, people who already scored lower on memory tests at 53 didn’t decline much further afterward. Researchers think that’s not a hopeful sign so much as evidence the damage had, in a sense, already been done by midlife, leaving less room left to lose. Accounting for other possible explanations, like childhood intelligence, mental health history, and education, didn’t change the picture. That doesn’t prove hardship alone caused these differences, since money troubles are often tangled up with other stresses, but it rules out some of the more obvious alternatives. Men and APOE-ε4 Carriers Showed the Steepest Brain Changes A few groups appeared especially vulnerable, though these findings come from the smaller scan-based group and need to be confirmed by future research before anyone treats them as settled. Men with a history of low income scored worse on processing speed at 53, and men who’d faced repeated financial hardship showed faster signs of brain shrinkage than women with similar histories, though the memory-test gap itself was small. Among those with persistent low income as adults, people who’d also grown up in working-class or lower-income households showed faster shrinkage in the hippocampus, a brain region tied to memory. Separately, carriers of APOE-ε4, the most well-known genetic risk factor for Alzheimer’s, seemed to fare worst of all when they also faced persistent financial hardship, showing the highest average levels of amyloid buildup and faster brain shrinkage than people without that gene variant. Why would money trouble get under the skin this way? One theory researchers point to is that financial stress eats up mental bandwidth, the kind of constant background worry that leaves less attention for everything else, day after day, year after year. That idea hasn’t been directly tested here, and other factors this study didn’t examine, like heart health or job instability, could also be playing a role. https://studyfinds.com/financial-hardship-memory-decline/