Table 2.
Recognition of emotional faces by patient with amnestic MCI and control subjects
| Face type | Control group (n= 24)
|
Amnestic MCI group (n =24)
|
Group difference
|
|||
|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | t | P-value | |
| Angry | ||||||
| Hits | 0.764 | 0.198 | 0.655 | 0.218 | 1.818 | 0.076 |
| False positives | 0.155 | 0.110 | 0.244 | 0.165 | −2.203 | 0.033 |
| Accuracy (Pr) | 0.610 | 0.186 | 0.411 | 0.258 | 3.052 | 0.004 |
| Bias (Br) | 0.437 | 0.267 | 0.432 | 0.205 | 0.080 | 0.937 |
| Neutral | ||||||
| Hits | 0.591 | 0.233 | 0.545 | 0.183 | 0.774 | 0.443 |
| False positives | 0.223 | 0.156 | 0.416 | 0.213 | −3.577 | 0.001 |
| Accuracy (Pr) | 0.368 | 0.180 | 0.129 | 0.154 | 4.959 | 0.000 |
| Bias (Br) | 0.380 | 0.258 | 0.471 | 0.211 | −1.340 | 0.187 |
| Happy | ||||||
| Hits | 0.752 | 0.190 | 0.688 | 0.161 | 1.271 | 0.210 |
| False positives | 0.211 | 0.149 | 0.413 | 0.231 | −3.602 | 0.001 |
| Accuracy (Pr) | 0.541 | 0.190 | 0.274 | 0.257 | 4.085 | 0.000 |
| Bias (Br) | 0.471 | 0.267 | 0.556 | 0.208 | −1.241 | 0.221 |
Notes: Hits – the effects within the group were significant (F=17.013, P<0.001). Further analysis with multiple comparisons indicated an angry versus neutral MD of 0.141 (P=0.001) and a neutral versus happy MD of −0.152 (P=0.000). The interaction was not significant (F=0.697, P=0.5030). False positives – the effects within the group were significant (F=11.753, P=0.000). Further multiple comparison indicated an angry versus neutral MD of −0.121 (P=0.000) and an angry versus happy MD of −0.007 (P=0.000). The interaction was not significant (F=2.625, P=0.084). Accuracy (Pr) – the effects within the group were significant (F=25.150, P=0.000). Further multiple comparison indicated an angry versus neutral MD of 0.262 (P=0.000), a neutral versus happy MD of −0.159 (P=0.000), and an angry versus happy MD of 0.103 (P=0.000). The difference between the groups was significant (F=−0.170 (P=0.000). The interaction is not significant (F=2.772, P=0.103). Bias (Br) – the effects within the group were significant (F=5.278, P=0.026). Further multiple comparison indicated a neutral versus happy MD of −0.088 (P=0.001). The interaction was not significant (F=1.772, P=0.190).
Abbreviations: MCI, mild cognitive impairment; MD, mean difference; SD, standard deviation.