Table 2.
Mean d′ (and SDs) for masked recognition performance between and within age groups.
| Duration (ms) | Fearful |
Neutral |
Happy |
||||||
|---|---|---|---|---|---|---|---|---|---|
| Y | O | p | Y | O | p | Y | O | p | |
| 17 | 1.35 (0.9) | 0.32 (0.4) | <0.001 | 1.24 (0.9) | 0.07 (0.4) | <0.001 | 1.62 (1) | 0.57 (0.5) | <0.001 |
| 33 | 1.35 (0.7) | 0.53 (0.4) | <0.001 | 1.26 (0.8) | 0.18 (0.5) | <0.001 | 1.58 (0.8) | 0.71 (0.6) | <0.001 |
| 50 | 3 (0.7) | 1.83 (0.8) | <0.011 | 2.85 (0.9) | 1.57 (0.8) | <0.001 | 3.03 (0.7) | 1.99 (0.9) | <0.001 |
| 67 | 3 (0.7) | 2.5 (0.7) | 0.036 | 3.03 (0.8) | 2.4 (0.6) | 0.007 | 3.52 (0.3) | 2.93 (0.5) | <0.001 |
| 83 | 3.32 (0.6) | 2.78 (0.6) | 0.01 | 3.35 (0.7) | 2.67 (0.7) | 0.003 | 3.5 (0.4) | 3.16 (0.6) | 0.03 |
| 117 | 3.4 (0.7) | 2.81 (0.7) | 0.009 | 3.41 (0.5) | 2.74 (0.7) | 0.001 | 3.5 (0.4) | 3.4 (0.4) | 0.424 |
| 267 | 3.48 (0.4) | 3.12 (0.5) | 0.018 | 3.42 (0.6) | 3.02 (0.5) | 0.025 | 3.55 (0.2) | 3.44 (0.4) | 0.271 |
|
YOUNG | |||||||||
| F | N | p | H | N | p | H | F | p | |
| 17 | 1.35 (0.9) | 1.24 (0.9) | 0.202 | 1.62 (1) | 1.24 (0.9) | 0.004 | 1.62 (1) | 1.35 (0.9) | 0.035 |
| 33 | 1.35 (0.7) | 1.26 (0.8) | 0.584 | 1.58 (0.8) | 1.26 (0.8) | 0.068 | 1.58 (0.8) | 1.35 (0.7) | 0.105 |
| 50 | 3 (0.7) | 2.85 (0.9) | 0.227 | 3.03 (0.7) | 2.85 (0.9) | 0.158 | 3.03 (0.7) | 3 (0.7) | 0.872 |
| 67 | 3 (0.7) | 3.03 (0.8) | 0.354 | 3.52 (0.3) | 3.03 (0.8) | 0.003 | 3.52 (0.3) | 3 (0.7) | <0.001 |
| 83 | 3.32 (0.6) | 3.35 (0.7) | 0.601 | 3.5 (0.4) | 3.35 (0.7) | 0.173 | 3.5 (0.4) | 3.32 (0.6) | 0.061 |
| 117 | 3.4 (0.7) | 3.41 (0.5) | 0.886 | 3.5 (0.4) | 3.41 (0.5) | 0.083 | 3.5 (0.4) | 3.4 (0.7) | 0.310 |
| 267 | 3.48 (0.4) | 3.42 (0.6) | 0.346 | 3.55 (0.2) | 3.42 (0.6) | 0.241 | 3.55 (0.2) | 3.48 (0.4) | 0.448 |
|
OLD | |||||||||
| F | N | p | H | N | p | H | F | p | |
| 17 | 0.32 (0.4) | 0.07 (0.4) | 0.005 | 0.57 (0.5) | 0.07 (0.4) | <0.001 | 0.57 (0.5) | 0.32 (0.4) | 0.087 |
| 33 | 0.53 (0.4) | 0.18 (0.5) | 0.001 | 0.71 (0.6) | 0.18 (0.5) | <0.001 | 0.71 (0.6) | 0.53 (0.4) | 0.175 |
| 50 | 1.83 (0.8) | 1.57 (0.8) | 0.051 | 1.99 (0.9) | 1.57 (0.8) | <0.001 | 1.99 (0.9) | 1.83 (0.8) | 0.287 |
| 67 | 2.5 (0.7) | 2.4 (0.6) | 0.273 | 2.93 (0.5) | 2.4 (0.6) | <0.001 | 2.93 (0.5) | 2.5 (0.7) | 0.013 |
| 83 | 2.78 (0.6) | 2.67 (0.7) | 0.176 | 3.16 (0.6) | 2.67 (0.7) | 0.007 | 3.16 (0.6) | 2.78 (0.6) | 0.021 |
| 117 | 2.81 (0.7) | 2.74 (0.7) | 0.124 | 3.4 (0.4) | 2.74 (0.7) | <0.001 | 3.4 (0.4) | 2.81 (0.7) | <0.001 |
| 267 | 3.12 (0.5) | 3.02 (0.5) | 0.073 | 3.44 (0.4) | 3.02 (0.5) | <0.001 | 3.44 (0.4) | 3.12 (0.5) | 0.01 |
Y, young; O, old; F, fearful; N, neutral; H, happy. Bold p-values indicate significance level of <0.05.