TY - JOUR
T1 - The Letter Digit Substitution Test: normative data for 1,858 healthy participants aged 24-81 from the Maastricht Aging Study (MAAS): influence of age, education, and sex
AU - van der Elst, W.
AU - van Boxtel, M.P.J.
AU - van Breukelen, G.J.P.
AU - Jolles, J.
PY - 2006/1/1
Y1 - 2006/1/1
N2 - The Letter Digit Substitution Test (LDST) is based on earlier developed substitution tests (e.g., Digit Symbol Substitution Test; Wechsler, 1955, 1981) but uses over-learned signs instead of the symbols used in other substitution tests. The written and oral versions of the LDST were administered to a large, cognitively screened sample (N = 1,858) of adults aged 24 to 81 years. Age was the most important predictor of LDST performance, and females outperformed males. A low level of education profoundly influenced LDST performance: the effect of a low versus high level of education on LDST performance was comparable to about 20 years of aging. Regression-based normative data were prepared for both the written and oral versions of the LDST.
AB - The Letter Digit Substitution Test (LDST) is based on earlier developed substitution tests (e.g., Digit Symbol Substitution Test; Wechsler, 1955, 1981) but uses over-learned signs instead of the symbols used in other substitution tests. The written and oral versions of the LDST were administered to a large, cognitively screened sample (N = 1,858) of adults aged 24 to 81 years. Age was the most important predictor of LDST performance, and females outperformed males. A low level of education profoundly influenced LDST performance: the effect of a low versus high level of education on LDST performance was comparable to about 20 years of aging. Regression-based normative data were prepared for both the written and oral versions of the LDST.
U2 - 10.1080/13803390591004428
DO - 10.1080/13803390591004428
M3 - Article
SN - 1380-3395
VL - 28
SP - 998
EP - 1009
JO - Journal of Clinical and Experimental Neuropsychology
JF - Journal of Clinical and Experimental Neuropsychology
ER -