![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgIBE3zGvfieGsCUkjLvZ45zR2MZxF3x__qo6SX96_eaPyN1FjsanjZL1qzX-s4mvsizO0kPIsmoUtcY85JzhKNYy6TqtExqHq_EVaCZCzV9BKQgPlmtTR6ViheWvtpfrWl0OIXdRGqEPU/s320/04anxiety-600.jpg)
http://www.nytimes.com/2009/10/04/magazine/04anxiety-t.html?_r=1&src=tptw
This is a very interesting article from The New York Times about anxious babies and how they develop according to circumstances and internal (mental and emotional) experiences.
Have a look. It's worth reading the full article.