________ has traditionally referred to genetic differences among groups of people based on tracing the ancestry of those groups throughout history

Bobby is weight lifting. After lifting 250 lbs., Bobby notices that he had accidentally put an extra 2 1/2 lb. weight on the right side of the barbell. Why hadn't he noticed this while he was lifting?

a) 2 1/2 lbs. was not above the difference threshold. b) Bobby's right arm is stronger than his left arm. c) 2 1/2 lbs was not above the absolute threshold. d) Bobby's activity was a violation of Weber's law.

Good relationships with parents and peers, a particular area of expertise, and a role that includes responsibilities for others are all characteristics of what the text refers to as:

a. stress breakers b. coping responses c. resilient individuals d. social comparison factors