The intervention group also received tips (16 อ่าน)
The intervention group also received tips and information about infant sleep, such as myth-busting the idea that fewer naps would lead to more nighttime sleep. (It's worth noting that this mix of a controlled crying method with other advice is common in studies examining sleep training, but makes it more difficult to parse which, if any, results are from the controlled crying alone.) To ensure both groups received some kind of instruction, the control group parents received information about infant safety.
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