If the puppy or dog is given the opportunity to get out of his crate when necessary, it can aid your house training efforts enormously. (sitmeanssit.com)
They will eventually realize that whining and barking won't get them out of their crate any sooner. (petcarrierverdict.com)
The idea is to make them think that settling and recovery behavior gets them out of the crate. (thedogsway.com)