Chapter 6: Quiz
1. In the Big Five personality model, extroversion is measured as:
- A) A binary category (introvert or extrovert)
- B) A continuous dimension with multiple facets
- C) A fixed, innate personality type
- D) A measure of social skills
Answer: B. The Big Five measures extroversion as a continuous dimension with facets including warmth, gregariousness, assertiveness, activity level, excitement-seeking, and positive emotionality.
2. What term describes people who score near the middle of the introversion-extroversion spectrum?
- A) Omniverts
- B) Centroverts
- C) Ambiverts
- D) Neutralverts
Answer: C. Ambiverts score near the middle of the extroversion scale and have both introverted and extroverted tendencies depending on context.
3. According to the research, the distribution of extroversion scores in the population is:
- A) Bimodal (two peaks, one for introverts and one for extroverts)
- B) A normal bell curve with most people near the middle
- C) Skewed toward extroversion
- D) Flat, with equal numbers at every point
Answer: B. Extroversion scores form a normal bell curve, with most people clustering near the middle — contrary to the popular binary framework.
4. The social media version of introversion conflates introversion with all of the following EXCEPT:
- A) Social anxiety
- B) Sensory processing sensitivity
- C) Conscientiousness
- D) Preference for deep conversation
Answer: C. Social media conflates introversion with social anxiety, sensitivity (HSP), and depth/intellectual richness. Conscientiousness is a separate Big Five dimension that is not typically confused with introversion.
5. Hans Eysenck's arousal theory proposed that:
- A) Introverts have lower baseline cortical arousal and seek more stimulation
- B) Introverts have higher baseline cortical arousal, making them more sensitive to stimulation
- C) Extroverts are more intelligent due to higher arousal
- D) Arousal has no relationship to personality
Answer: B. Eysenck proposed that introverts have higher baseline arousal, making them more sensitive to stimulation and therefore more likely to seek lower-stimulation environments.
6. The heritability of extroversion is estimated at approximately:
- A) 0–10%
- B) 40–60%
- C) 80–95%
- D) 100%
Answer: B. Twin studies estimate the heritability of extroversion at approximately 40–60%, meaning it is partly genetic but also substantially influenced by environment and experience.
7. Susan Cain's Quiet made an important cultural contribution by:
- A) Proving that introverts are superior to extroverts
- B) Highlighting that Western culture overvalues extroverted traits and undervalues introverted ones
- C) Establishing the scientific basis for the introvert/extrovert binary
- D) Debunking the Big Five personality model
Answer: B. Cain's core insight — that American culture systematically undervalues introversion — was a valuable cultural corrective. However, the book also reinforced the binary framework that the science doesn't fully support.
8. Why is it important to distinguish introversion from social anxiety?
- A) They have the same treatment approach
- B) Introversion is a personality dimension that doesn't need treatment; social anxiety is a treatable clinical condition
- C) Social anxiety is less common than introversion
- D) They are measured by the same instrument
Answer: B. Introversion is a normal personality variation. Social anxiety is a clinical condition that responds to treatment (especially CBT). Calling social anxiety "introversion" can delay appropriate help by reframing a treatable condition as a fixed personality trait.
9. Research by Adam Grant suggests that ambiverts may outperform both strong introverts and strong extroverts in some domains because:
- A) They are more intelligent
- B) They can flexibly adapt their behavior to different situations
- C) They work harder
- D) They have higher emotional intelligence
Answer: B. Grant's research found that ambiverts performed best in sales because they could match their interpersonal style to the situation — being assertive when needed and listening carefully when appropriate.
10. The chapter's overall verdict on the introvert/extrovert distinction is:
- A) Completely debunked — the concept has no scientific basis
- B) Oversimplified — introversion-extroversion is a real dimension, but the popular binary version distorts it into a fixed category
- C) Fully supported — people clearly fall into two types
- D) Unresolved — scientists disagree about whether the dimension exists
Answer: B. The dimension is real and well-supported (Big Five). But the popular version oversimplifies it into a binary, conflates it with other constructs, and treats it as more fixed than the evidence supports.