Scientests Replicated 100 Psychology Studies, and Fewer Than Half Got the Same Results: Smithsonian

Scientists Replicated 100 Psychology Studies, and Fewer Than Half Got the Same Results

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This is one of the reasons it is important to "think critically" and look at the research.  Often that will give you a clue as to the validity, but not always.  Replication is also important.  It is very easy to skew research...and yes, some people lie and cheat on purpose.