It's a great study to look at, because there are a truly wonderful number of potential sources of bias in the methods Note: I say POTENTIAL sources of bias for a reason. Generally, you can't tell definitively whether things have biased a study without access to the raw data
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If someone is bashing a piece of research, take a look at their arguments and think: "Is this really going to influence the results?" "Will it impact all groups equally?" "WHAT impact will it have?" These are all vital questions to answer
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They are also important for you yourself if you want to know more about the research and its usefulness
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This has been my brief thread on bias. If anyone's interested, let me know and I'll do another on different sources of bias or expand on this one
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End of conversation
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