Social scientists bear glad tidings for the holiday season. After extensively observing how people respond to gifts, they have advice for shoppers: You don’t have to try so hard.You’re not obliged to spend hours finding just the right gift for each person on your list. Most would be just as happy with something quick and easy. This may sound too good to be true, but rest assured this is not a ploy by some lazy Scrooges in academia.Let your recipients do the work for you. They know what they want better than you do. If they’ve asked for something, buy it instead of surprising them.