20 home-reared male infants (mean age-13 weeks) were presented with either 3 levels of visual or 3 levels of auditory stimulation. Each S received 2 7-minute blocks of stimulation for 2 consecutive ...

I used to think my baby smiled because he was happy. This was last year. Isaiah, once he hit 2 months, smiled like he was trying to catch flies—mouth open wide, eyes crinkled, tongue hanging out. He ...

Based on a completed data assessment of mothers and infants from two cultures that were shown to differ concerning maternal ethnotheories about ideal infant affect, namely mothers from urban ...