The document discusses barriers to critical thinking such as egocentrism, sociocentrism, unwarranted assumptions and stereotypes, relativistic thinking, and wishful thinking. Egocentrism refers to thinking primarily about oneself, while sociocentrism is group-centered thinking. Unwarranted assumptions are beliefs made without evidence, and relativistic thinking says that truth is subjective. The document also lists characteristics of a critical thinker, including being passionate about critical thinking standards, sensitivity to multiple perspectives, strong analytical skills, open-mindedness, and acknowledging personal biases.