Schnitker and Emmons (2007) found evidence for an inverse relationship between patience and negative affect and between patience and depression, but a positive relationship between patience and self-reports of certain negative health outcomes, including headaches, acne, and ulcers.
They found that trait stability increased from a correlation .31 in childhood to .54 during the college years, to .64 at age 30, and then it reached a plateau around .74 between the from age 50 until the age of 70. What we can infer from these results is that personality seems to stabilize with increasing age.
Your Baby from 4 to 6 Months: Personality! The sight of you makes your 4-month-old baby smile, and he may fuss when you leave, both signs that his social development at 4 months is right on track. Learn about his emotional and language development, and see what other 4 month old milestones your baby should have! By Holly Robinson from American Baby.