An interesting, cool, new study.
http://www.eurekalert.org/pub_releases/2006-07/uoia-dby072706.php
>From the article, " "A mother's sensitivity to her baby's distress at
six months was a significant predictor of the baby's attachment
security at 15 months, but sensitivity during times of nondistress was
not. It's important that babies become securely attached to their
caregivers because it's the foundation for future healthy child
development," she said. "
This is similar to the bigger idea we've heard on this site before:
losses matter more than gains. Negative things have a stronger effect
than positive. Some people in fact define happiness as the absence of
unhappiness. So when moms respond positively and supportively to their
baby, that's great. When they respond in a way that lets the baby know
they understand the baby's crying, in some emotionally responsive way,
then that's supposed to be great too, according to this new research.
The study doesn't mention what happens when moms respond unsupportively
and unhappily towards a happy baby - I bet that also has a negative
effect.
So, the upshot appears to be not necessarily to be happy all the time
with the baby, but to respond to the baby effectively, sometimes
happily, and sometimes supportively/caringly/comfortingly.