Table 3.
ERP amplitudes and latenciesa
| Control (n =13) | Schizophrenia (n = 12) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| N400 | ||||||||||
| Amplitude | Fz | Cz | Pz | TCP1 | TCP2 | Fz | Cz | Pz | TCP1 | TCP2 |
| Dom, sense | 4.2 (5.9) | 1.6 (5.8) | 1.8 (5.4) | 0.5 (4.5) | 2.6 (3.7) | −2.2 (6.2) | −2.7 (5.1) | −1.9 (5.7) | −2.5 (5.3) | −1.1 (4.3) |
| Sub, sense | 3.8 (5.6) | 1.6 (4.9) | 1.9 (3.9) | 0.1 (3.8) | 1.7 (3.1) | −2.8 (8.7) | −3.8 (7.9) | −2.4 (7.4) | −3.3 (6.2) | −1.7 (5.9) |
| Sub, non | 1.9 (5.0) | −1.0 (4.3) | −0.7 (4.8) | −0.6 (4.2) | −0.6 (3.4) | −1.2 (8.8) | −2.8 (7.1) | −1.9 (7.7) | −2.2 (5.5) | −1.1 (5.9) |
| Latency | ||||||||||
| Dom, sense | 457.0 (104.3) | 503.7 (102.3) | ||||||||
| Sub, sense | 421.9 (78.5) | 544.4 (102.3) | ||||||||
| Sub, non | 421.9 (64.7) | 517.0 (83.4) | ||||||||
| LPC | ||||||||||
| Amplitude | Fz | Cz | Pz | TCP1 | TCP2 | Fz | Cz | Pz | TCP1 | TCP2 |
| Dom, sense | 8.3 (6.0) | 6.4 (6.1) | 4.4 (6.9) | 3.7 (5.3) | 5.2 (4.1) | 2.4 (6.8) | 1.7 (6.5) | 0.9 (6.5) | 0.2 (5.6) | 1.3 (4.8) |
| Sub, sense | 6.8 (5.3) | 5.3 (4.6) | 4.7 (4.5) | 2.7 (4.1) | 3.9 (3.2) | 3.5 (8.0) | 1.4 (7.7) | 0.9 (6.6) | −0.2 (5.8) | 2.1 (4.9) |
| Sub, non | 6.4 (4.3) | 5.9 (4.2) | 5.0 (3.4) | 3.9 (2.5) | 3.9 (3.2) | 5.3 (9.1) | 2.6 (7.4) | 1.7 (6.7) | 1.5 (6.0) | 2.3 (5.5) |
| Latency | ||||||||||
| Dom, sense | 630.3 (110.0) | 662.6 (107.5) | ||||||||
| Sub, sense | 561.8 (88.3) | 705.2 (118.0) | ||||||||
| Sub, non | 561.2 (52.0) | 668.2 (63.0) | ||||||||
a
Note: values are mean (SD). Amplitudes are µV, mean voltage over 50 ms interval centered about Cz peak latency. Latencies are ms. Dom, sense dominant homograph sentence judged sensible; Sub, sense subordinate homograph sentence judged sensible; and Sub, non subordinate homograph sentence judged nonsensical.