# Types of Blood - O Negative By:: [[Brian Heath]] 2023-01-10 In Japan and South Korea, there is a commonly held belief that your personality is predictable based on your blood type. For example, those with an O Negative blood type are understanding, rational, and energic. If you are unfamiliar with blood-type personalities, this likely seems weird but people take it seriously. However, some may think that mapping blood types to zodiac signs could reveal even more of a person's true personality. As far as science is concerned, all of these are pseudoscience and not remotely good at predicting personalities. Still, they persist for many reasons related to control and uncertainty. The world of business is not immune to these pseudoscientific personality [[assessments]]. In the United States, they are big business and generate millions of dollars. Any time you are taking a test for "HR" to determine what kind of manager you are, how you like to work, or what your strengths might be, you are likely landing squarely in the realm of pseudoscience and blood-type personalities. Some tests are better than others, but often the methodologies are locked behind trademarks and secret algorithms. If you can't find scientific papers and research on a test, it is best to be skeptical of its legitimacy. However, while all models are wrong, some are useful. Even a broken clock is right twice a day. I suspect that the redeemable value of these "tests" is not the outcome, but the process of reflecting on yourself and others. We rarely spend time reflecting on anything at work - let alone things internal to ourselves or others. Use these tests for this purpose, but do not let them define you. Even the best personality tests in the world are woefully inaccurate by life-betting standards. #### Related Items [[Human Resources]] [[Management Fads]] [[Ideology]] [[Identity]] [[Types of Managers]] [[Beliefs]]