A Brief Report on the Factor Structure of the Cognitive Measures in the HRS/AHEAD Studies

Table 2

Descriptive statistics for cognitive measures at initial testing.

Statistic	IR	DR	S7	BC	DA	NA
M	53.96	42.49	70.69	96.77	94.35	91.71
SD	16.58	19.56	31.39	17.71	11.78	14.84
Min	10	0	0	0	50	25
Max	100	100	100	100	100	100
Skewness	0.27	0.10	−0.74	−5.33	−1.97	−1.75
Kurtosis	0.22	0.14	−0.69	27.67	3.14	2.60

Note: IR: immediate recall; DR: delayed recall; S7: serial 7s; BC: backward counting; DA: dates; NA: names.