Table 5.
Means, (SDs) and differences between IQ-equivalent SRMCA (SR) and cognitive performance (COG) scores across demographics and personality types.
| Variable | Category | Gf | ∆ | Gc | ∆ | G | ∆ | |||
|---|---|---|---|---|---|---|---|---|---|---|
| SR | COG | SR | COG | SR | COG | |||||
| Ed | High School | 99.48 | 95.83 | 100.57 | 101.06 | 100.86 | 97.87 | |||
| (19.18) | (16.2) | (19.95) | (16.97) | (20.12) | (17.28) | |||||
| Certificate | 101.65 | 95.88 | 99.85 | 99.48 | 100.33 | 96.98 | ||||
| (16.38) | (17.97) | (17.15) | (18.85) | (15.8) | (19.28) | |||||
| Tertiary | 104.66 | 112.53 | ↓ * | 105.33 | 105.26 | 104.69 | 109.95 | |||
| (18.13) | (13.11) | (16.68) | (17.17) | (17.81) | (13.36) | |||||
| Sex | Females | 99.20 | 106.46 | ↓ * | 104.17 | 104.24 | 100.03 | 106.10 | ↓ * | |
| (19.69) | (18.74) | (19.15) | (16.51) | (19.9) | (17.69) | |||||
| Males | 104.99 | 97.89 | ↑ * | 100.13 | 100.07 | 104.19 | 98.24 | ↑ * | ||
| (15.53) | (15.36) | (16.44) | (18.66) | (15.53) | (16.71) | |||||
| Age | ≤67 | 102.21 | 109.08 | ↓ * | 103.49 | 100.55 | 101.92 | 105.43 | ||
| (16.43) | (18.46) | (18.00) | (18.90) | (17.64) | (19.19) | |||||
| 68+ | 102.04 | 94.72 | ↑ * | 100.67 | 103.82 | 102.36 | 98.61 | |||
| (19.44) | (13.11) | (17.78) | (16.27) | (18.27) | (15.06) | |||||
| E | Lower | 97.31 | 102.02 | 97.68 | 104.04 | ↓ ** | 97.77 | 103.33 | ↓ * | |
| (17.13) | (17.85) | (16.72) | (19.18) | (16.96) | (18.16) | |||||
| Higher | 107.50 | 102.25 | 107.09 | 100.00 | ↑ ** | 106.98 | 100.80 | |||
| (17.27) | (17.44) | (17.95) | (15.74) | (17.75) | (16.97) | |||||
| A | Lower | 99.85 | 103.76 | 98.97 | 101.13 | 100.15 | 102.62 | |||
| (18.21) | (17.91) | (17.76) | (19.91) | (17.17) | (18.07) | |||||
| Higher | 104.01 | 100.79 | 104.73 | 102.96 | 103.75 | 101.73 | ||||
| (17.51) | (17.33) | (17.68) | (15.72) | (18.40) | (17.29) | |||||
| C | Lower | 98.43 | 101.75 | 101.62 | 102.94 | 99.20 | 102.26 | |||
| (16.77) | (16.77) | (18.45) | (16.85) | (16.41) | (17.18) | |||||
| Higher | 105.60 | 102.48 | 102.61 | 101.36 | 104.87 | 102.01 | ||||
| (18.31) | (18.44) | (17.46) | (18.53) | (18.86) | (18.09) | |||||
| N | Lower | 106.27 | 100.50 | 104.41 | 99.03 | ↑ * | 105.41 | 99.19 | ↑ * | |
| (17.65) | (18.49) | (18.43) | (17.62) | (18.10) | (18.03) | |||||
| Higher | 97.51 | 103.94 | ↓ * | 99.59 | 105.58 | ↓ * | 98.47 | 105.41 | ↓ ** | |
| (17.11) | (16.48) | (17.04) | (17.25) | (17.04) | (16.61) | |||||
| O | Lower | 94.79 | 101.69 | ↓ * | 97.11 | 100.94 | 95.75 | 101.28 | ↓ * | |
| (15.42) | (18.33) | (16.85) | (17.92) | (15.97) | (18.05) | |||||
| Higher | 111.44 | 102.69 | ↑ * | 108.49 | 103.64 | 110.21 | 103.20 | ↑ * | ||
| (16.46) | (16.74) | (17.23) | (17.42) | (16.97) | (17.07) | |||||
Note: Ed = Education; E = Extraversion; A = Agreeableness; C = Conscientiousness; N = Neuroticism; O = Openness. ∆ Significant difference estimated with paired-samples t-test. ↑ overestimated one’s ability; ↓ underestimated one’s ability. Comparisons of self-estimated Gv were not performed given the absence of a corresponding cognitive performance factor. * p < 0.05, ** p < 0.01.