A new study finds that letting an infant cry itself to sleep is the best way to ensure a good night’s rest for all. The researchers, led by Marsha Weinraub, professor and chair of psychology at Temple, concluded that babies should be left to go to sleep on their own - even if that meant they cried for a bit. Doing so enabled them to learn how to “self soothe,” which also gave frazzled parents a break. “The best advice is to put infants to bed at a regular time every night, allow them to fall asleep on their own and resist the urge to respond right away to awakenings,” said Weinraub.