Table 3 Means (and SDs) for the state and trait measures of everyday mood and cognitive variables for social class, also showing age*social class interactions

State mood

State PA

33.29 (5.6)

33.65 (6.3)

34.92 (6.1)

29.35 (9.2)

27.37 (9.6)

25.38 (7.4)

p = 0.590

p = 0.142

State NA

13.40 (4.5)

14.65 (5.4)

15.21 (5.5)

13.58 (5.5)

13.94 (5.7)

14.38 (5.1)

p = 0.285

p = 0.740

Trait mood and mood variability measures

Trait PA

27.53 (4.8)

27.34 (6.0)

28.74 (5.6)

23.48 (8.0)

21.69 (7.5)

23.75 (6.3)

p = 0.235

p = 0.571

Trait PA variability

5.30 (2.2)

5.44 (2.0)

4.83 (1.8)

4.13 (2.1)

3.91 (2.0)

4.21 (2.4)

p = 0. 894

p = 0.474

Trait NA

11.65 (2.3)

11.59 (2.3)

11.84 (2.2)

12.16 (3.7)

12.50 (3.4)

13.28 (3.0)

p = 0.521

p = 0.677

Trait NA variability

1.64 (1.6)

1.44 (1.1)

1.41 (1.2)

1.63 (1.6)

1.65 (1.3)

2.42 (1.9)

p = 0.403

p = 0.194

Cognitive function

Pattern recognition memory (ms)

2346.60 (572.9)

2500.22 (791.7)

2722.75 (734.7)

3043.21 (1269.4)

2978.45 (1509.2)

3270.22 (1223.3)

p = 0.375

p = 0.688

Spatial working memory (total errors)

35.56 (18.4)

34.52 (21.1)

48.57 (17.5)

29.18 (20.9)

36.63 (22.5)

38.19 (23.3)

p = 0.023

p = 0.102

5-Choice reaction time (ms)

378.62 (53.4)

384.58 (62.9)

404.63 (61.9)

439.90 (117.9)

446.03 (91.1)

447.04 (50.7)

p = 0.544

p = 0.813

Match to sample visual search (ms)

3044.68 (972.9)

2882.20 (949.2)

3592.38 (1376.8)

3999.73 (1368.7)

3837,19 (1289.9)

4936,15 (2031.2)

p = 0.001

p = 0.684