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Comparison of Item Difficulties in NSHAP Pretest, NSHAP Wave 2, and Clinic Samples. Abbreviations: NSHAP - National Social life Health and Aging Project, Subt 7 – Subtract 7s, Orient – Orientation, Visuospat – Visuospatial skills, Exec Fn – Executive Function. P-values from joint Wald tests are represented by *** for p<0.001, ** for p<0.01, and * for p<0.05. Error bars represent 95% confidence intervals.
