Scientists have long focused on quantifying fear and other negative emotions in animals. Now they’re trying to measure positive feelings — and it’s a challenge.

Scores from a commonly used measure of behavior problems in young children may be skewed depending on the primary language, education, and sex of the caregiver who fills out the survey, as well as the ...

I am interested in how stressful experiences impact the health of people. My book, Stress, Health, and Behavior, presents a review of the damaging effects of stress on physical and mental health. In ...

Anticipatory behavior describes the actions taken to prepare for an upcoming event. It is considered a promising tool for welfare assessment, but it is not fully applied in zoos and other facilities.