The alternative sanctions should be evaluated for effectiveness, cost efficiency, and unintended harmful consequences in much the same way as SCP has. Anecdotal evidence suggests that all the alternatives have low success rates and many are harmful to some children.
Anecdotal evidence suggests……. That’s quite a qualifier! Immediate effectiveness would involve judging outcomes by something that sounds too Pavlovian to me never mind agreeing with durations. Intended or unintended consequences would involve measuring not only differences in intent but also the nature and degree of ensuing consequences. Given the uniqueness of each child, especially overblown by classifications of disabilities IMHO, the likelihood of harm done by some and not others would make calculations difficult, to say the least.