If a response variable has three levels, could these variants be collapsed differently to obtain two analyses? For example, if a response variable has the following three levels: - deletion of a segment; - addition of a segment; and - application of no rules. Would it be appropriate to develop two separate studies by collapsing different levels into the application value? 1 - One study focusing on: the application (i.e., deletion and addition of segments) vs. non-application of rules; and 2 - Another study analyzing: target-like forms (deletion and application of no rules) vs. non-target-like forms (addition of a segment)? I would appreciate your suggestions and comments...

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