Table 2. Number and Percentage of Significant Effects (p < .05) for Each Factor Combination in a 4-Way ANOVA of Simulated Data with All Null Main Effects and Interactions.

ANOVA Factor	Number of Simulations with Significant Effects	Percentage of Simulations with Significant Effects
AP	500	5.0%
G	495	5.0%
SP	536	5.4%
SV	503	5.0%
AP × G	497	5.0%
SP × AP	469	4.7%
SP × G	518	5.2%
SP × SV	484	4.8%
SV × AP	499	5.0%
SV × G	516	5.2%
SP × AP × G	479	4.8%
SP × SV × AP	488	4.9%
SP × SV × G	525	5.3%
SV × AP × G	511	5.1%
SP × SV × AP × G	503	5.0%
Average	502	5.0%
Experiments with a Type I Error	5325	53.3%

Note. G = Group, SP = Stimulus Probability, SV = Stimulus Valence, AP = Anterior-Posterior Electrode Cluster.