Table 1

Test results (means (SD)) in referents (carpenters) and floor layers, younger and older subjects, at baseline and follow up

CarpentersFloor layers
Younger (n=22)Older (n=18)Younger (n=20)Older (n=21)
BaselineFollow upBaselineFollow upBaselineFollow upBaselineFollow up
Age 26.2 (3.2) 44.1 (3.1) 45.8 (6.5) 63.3 (6.5) 26.1 (3.2) 44.1 (3.1) 44.1 (6.2) 62.2 (6.1)
Synonyms 18.3 (4.7) 20.8 (4.3) 18.6 (5.4) 18.5 (5.1) 18.4 (3.2) 20.8 (4.0) 18.6 (4.6) 19.9 (5.6)
Reasoning 23.1 (3.3) 22.3 (3.6) 21.4 (4.2) 17.5 (4.4) 23.0 (3.1) 21.1 (4.2) 20.4 (3.1) 19.4 (4.2)
Block design 29.8 (4.0) 28.2 (4.0) 29.4 (5.2) 26.0 (6.3) 29.0 (4.1) 26.3 (5.5) 26.4 (4.7) 23.0 (7.5)
Unfolding 31.0 (6.4) 31.3 (6.3) 28.4 (5.1) 27.7 (6.0) 29.6 (5.5) 29.5 (6.4) 28.7 (7.0) 27.0 (6.6)
Digit symbol 50.8 (8.8) 50.7 (9.1) 41.8 (11.7) 37.7 (10.2) 52.6 (9.3) 48.6 (10.5) 44.2 (7.8) 38.9 (9.2)
Identical numbers 84.0 (10.3) 84.6 (11.3) 80.9 (18.0) 72.3 (16.6) 88.4 (14.8) 88.3 (16.5) 87.2 (13.3) 77.8 (14.8)
Dots-speed810.0 (120)742.0 (124)755.0 (175)669.0 (143)773.0 (142)714.0 (118)747.0 (117)653.0 (107)
Dots-accuracy 3.5 (1.9) 2.7 (3.6) 4.1 (3.6) 4.1 (3.9) 2.6 (2.0) 2.1 (1.9) 3.8 (3.9) 3.8 (2.2)
Bolt 26.2 (3.4) 26.0 (4.6) 21.1 (3.9) 19.7 (5.3) 24.1 (3.3) 23.5 (5.3) 22.4 (5.0) 18.9 (5.1)
Pins 30.0 (3.6) 29.6 (3.4) 28.1 (3.3) 26.3 (5.3) 29.4 (3.5) 30.3 (5.6) 29.0 (2.9) 27.5 (4.9)
Benton-correct 7.4 (1.3) 7.8 (1.0) 6.9 (1.2) 7.0 (1.5) 7.5 (1.5) 7.7 (1.4) 7.2 (1.2) 6.6 (1.3)
Benton-error 3.5 (1.9) 2.9 (1.5) 4.4 (1.9) 4.7 (2.8) 3.4 (2.7) 3.4 (2.2) 4.2 (1.9) 5.2 (2.6)