Path integration impairments reveal early cognitive changes in subjective cognitive decline.

We also observed a marginally significant group difference in reporting noise (σ r 2 ; estimate = 0.035, SE = 0.017, t = 2.070, and P = 0.042; Fig. 5E ), with SCD participants exhibiting slightly higher values compared to controls.

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In addition, distance error increased with age (estimate = 0.007, SE = 0.003, t = 1.978, and P = 0.049), although this effect was borderline significant and should be interpreted with caution.

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