fix bad call
@@ -194,7 +194,7 @@ class factor(Transformation):
continue
lev_grp['amplitude'] = 1.0
new_col = SparseBIDSColumn(self.manager, name, lev_grp,
- factor_name=col.name, factor_index=i,
+ factor_name=col.name, level_index=i,
level_name=lev_name)
result.append(new_col)
