Image: New Study by UGA Psychologists Reveals Unique Role of Stress Hormone in Infants February, 2012 A new study by University of Georgia psychologists in collaboration with researchers at Johns Hopkins University has shown for the first time that the hormone cortisol may operate differently in infants and adults. This work, conducted by graduate student Melissa Bright and faculty member Janet Frick, was published in Developmental Psychobiology and was recently covered on ScienceDaily and in the UGA Columns Newspaper.