Are there any suggestions about how to appropriately analyze our dataset? We have three conditions, which are three levels of a single factor, sentence complexity:
Condition 1: complexity = low
Condition 2: complexity = medium
Condition 3: complexity = high
What is the best way to analyze this at the group level? If we had four levels of the factor, we would use 3dANOVA2 using equally-space contrast weights (e.g., -3, -1, 1, 3). However, we have three levels, so using contrast weights of [-1, 0, 1] would not incorporate the medium condition. Suggestions?