“Object permanence” is the understanding that objects and people continue to exist when they are out of sight. This new skill plays a vital role in memory development and language acquisition as well as enhancing pretend play and exploration. Recent research suggest that babies begin to show an understanding of object permanence between 4 and 7 months of age. Separation anxiety occurs as a result of this newly acquired skill which causes your little one to feel upset when they cannot see you although knowing that you are still somewhere out there.
There are 3 basic rules to look for to identify a colic baby: cries at least 3 hours a day, crying occurs at least 3 times a week and it continues for at least 3 weeks in a row. Colic crying is usually defined to be more intense, louder, and higher-pitched than regular crying; sometimes it may even sound like screaming. The crying generally happens around the same time every day. The symptoms start to occur around 2 or 3 weeks of age, peaking around week 6, then usually begin to settle down around 10th to 12th weeks.