Critical thinking is usually described as a part of problem solving and of creative thinking. Critical thinking usually implies appraisal in terms of some standard or value. And, according to the reports of research conducted at the University of Buffalo in their Creative Education Foundation, as one gains facility in critical thinking skills there also occur significant gains in personality traits such as confidence, self-reliance, persuasiveness, initiative, and leadership potential.
Cianciolo, P. J. (1969). Discriminating Readers are Critical Thinkers. Reading Horizons, 9 (4). Retrieved from http://scholarworks.wmich.edu/reading_horizons/vol9/iss4/3