This document discusses critical thinking in cross-cultural psychology. It defines critical thinking as thinking about one's own thinking process, including how and why conclusions are drawn. Specific tools for critical thinking discussed include metathinking, metathoughts, and cognitive biases. Metathinking involves strategies for inquiry and problem solving. Metathoughts are thoughts about one's own thoughts that serve as "antidotes" to counter natural biases. Several cognitive biases are explained such as the fundamental attribution error and availability bias. The importance of distinguishing between correlation and causation is also highlighted.