Help!

After reading your comments (from my last blog), and most of the commentators shared the same sentiments with me I tend to disagree with the Book Author. In real life situation some people are reserved while others are hyper activite (talkative). Those are who reserved are always quite smile only half a second when you ask them a question they respond with only one word. These individuals can come different groups of families, born with a silver spoon or not. Maybe the researches ingored this point and picked reserved children from the low income families. How do someone answer such question during exams especially when some facts do not match. Do you write what is on the book or what you know. Most of the students who commented on this topic had first hand experiences