I have conducted a between-subjects experiment and want to compare if there are differences between two groups in parameters of HDDM. I am running all combinations of a, z, v and t as free parameters using
Model=hddm.HDDM(data, depends_on={'z': 'condition'})
All parameters and combinations of parameters work aside from z parameter alone, where I get this error: "One of the column names specified via depends_on was not picked up. Check whether you specified the correct parameter value."
Any ideas?