She is a child developmental psychologist and he is an automotive body technician.

CNN: Supreme Court tackles Native American adoption dispute

In a recent study by the developmental psychologist Laurence Steinberg at Temple University, teenagers did a simulated high-risk driving task while they were lying in an fMRI brain-imaging machine.

WSJ: What's Wrong With the Teenage Mind?

Another experiment, "the Still Face, " conducted by Edward Tronick, now a developmental psychologist at the University of Massachusetts Boston, demonstrates that a child can experience a mother's emotional withdrawal at an early age.

WSJ: Why We Pair Up With Our Emotional Opposites and Relationship Advice for Making It Work

The pediatrician and developmental psychologist Ronald Dahl at the University of California, Berkeley, has a good metaphor for the result: Today's adolescents develop an accelerator a long time before they can steer and brake.

WSJ: What's Wrong With the Teenage Mind?

"There would be a long way to go before these fads could be said to be anything more than just fads, " says Dr Helen Barrett, developmental psychologist and research fellow at Birkbeck College, University of London.

BBC: Why do people dress up their pets?

He is a developmental and community psychologist whose research focuses on the development of young children in ethnically diverse and immigrant families and the effects of public policies and early childhood intervention on children.

WHITEHOUSE: President Obama Announces More Key Administration Posts