Negative emotions people may have suffered as young adults can have a lasting grip on their couple relationships, well into middle age, research demonstrates. The study followed 341 people for 25 years, and found that negative emotions they may have suffered as young adults can have a lasting grip on their couple relationships, well into middle age. The fact that depression and anger experienced during the teen years clung to people, even through major life events such as child-rearing, marriages and careers was surprising, researchers note.