21. Studies have also indicated individual variation in temperament, such as sociability or impulsiveness . 22. Urd's impulsiveness often makes her act first without fully considering the consequences. 23. He is often the voice of reason and prudence moderating Yoko's impulsiveness . 24. His impulsiveness is irritating, to be sure. 25. Torrijos stated that " there would be less impulsiveness " in government without Martinez. 26. As a result, Russian foreign and domestic policy is characterized by impulsiveness and inconsistency. 27. Sophie's impulsiveness and Konrad's timidity become the characters'defining traits. 28. Along the way, he reacted to adversity with a decisiveness that bordered on impulsiveness . 29. "Kennedy's Achilles'heel is his impulsiveness and immaturity," 30. There is an impulsiveness in this approach, but it is paved over with wisdom.