One major debate in moral psychology concerns whether moral judgments require some (defeasible) motivation to adhere to the moral judgment (motivational internalism), or whether one can make a moral judgment without being motivated to adhere to it (motivational externalism).

One of the first two "moral judgements" in this confusing sentence is probably a typo. "Defeasible" just makes things more confusing. Maybe follow the vein of your linked Wikipedia paragraph more closely?