Table 4.
Summary of mean (SE) values of the ERPs in the DAT and SST for heavy and occasional cannabis users
| THC | Placebo | THC | History | Stimulus | THC × history | THC × stimulus | |||
|---|---|---|---|---|---|---|---|---|---|
| Heavy | Occasional | Heavy | Occasional | ||||||
| DAT | |||||||||
| P100 amplitude (μV) | Ns | Ns | 0.01 | 0.006 | Ns | ||||
| Distracters | 2.54 (0.33) | 2.96 (0.33) | 2.34 (0.33) | 3.72 (0.59) | |||||
| Targets | 3.9 (0.47) | 3.43 (0.42) | 2.67 (0.37) | 5.47 (0.91) | |||||
| P100 latency (ms) | Ns | Ns | Ns | Ns | Ns | ||||
| Distracters | 145.6 (6.4) | 138.8 (8.0) | 138.7 (6.4) | 145.7 (6.6) | |||||
| Targets | 139.8 (6.5) | 139.3 (7.0) | 138.2 (6.7) | 147.6 (6.4) | |||||
| P300 amplitude (μV) | 0.003 | Ns | 0.000 | Ns | 0.014 | ||||
| Distracters | 0.67 (0.4) | 0.61 (0.5) | 0.81 (0.4) | 1.1 (0.3) | |||||
| Targets | 4.17 (1.1) | 3.19 (0.4) | 6.1 (1.1) | 8.42 (1.7) | |||||
| P300 latency (ms) | Ns | Ns | Ns | Ns | Ns | ||||
| Distracters | 404.9 (15.0) | 409.6 (23.5) | 458.2 (25.3) | 407.7 (22.0) | |||||
| Targets | 438.9 (25.2) | 404.8 (11.7) | 437.2 (13.5) | 427.4 (20.5) | |||||
| SST | |||||||||
| N200 amplitude (μV) | Ns | Ns | 0.000 | Ns | Ns | ||||
| Go | 0.88 (0.9) | 2.09 (1.3) | 0.06 (0.7) | 2.50 (0.6) | |||||
| NoGo50 | −2.38 (1.2) | −2.45 (0.8) | −3.39 (0.5) | −3.61 (0.5) | |||||
| NoGo150 | −1.14 (0.99) | −0.79 (1.3) | −0.40 (1.0) | 1.81 (1.3) | |||||
| NoGo250 | −4.08 (1.4) | −5.29 (0.9) | −5.38 (1.7) | −8.27 (1.3) | |||||
| NoGo350 | −8.58 (1.0) | −8.91 (1.5) | −7.98 (1.0) | −10.31 (1.0) | |||||
| N200 latency (ms) | Ns | Ns | 0.000 | Ns | Ns | ||||
| Go | 223.0 (15.7) | 208.2 (10.3) | 227.4 (16.2) | 207.6 (9.5) | |||||
| NoGo50 | 250.2 (13.4) | 250.5 (12.5) | 253.3 (15.4) | 229.7 (10) | |||||
| NoGo150 | 334.8 (9.0) | 366.6 (14.7) | 359.7 (16.0) | 354.9 (9.5) | |||||
| NoGo250 | 462.8 (13.6) | 499.6 (9.9) | 493.83 (8.5) | 505.6 (8.4) | |||||
| NoGo350 | 579.9 (13.0) | 594.4 (14.0) | 582.7 (8.5) | 589.2 (10.8) | |||||
Ns not significant