Textbook: Yukl, G. (2013). Leadership in Organization (8th edition). Harlow, Unite Kingdom: Pearson Education. ISBN 9780273765660 Topic: Leader traits and skills Question: What is "too much of a good thing effect"? Are there any trait/skill that demonstrates this effect? How do these traits/skills predict leadership effectiveness? Curvilinear Relationship: a moderate level makes an effective leader - Achievement orientation or self-confidence (moderately high)