A recent study shows spanking probably isn’t a good idea, but almost everyone has a story that says otherwise. Learn where anecdotal evidence is useful, and (perhaps more importantly), where it isn’t.
Spanking and Child Outcomes: Old Controversies and New Meta-Analyses - http://psycnet.apa.org/?andfa=main.doiLandinganddoi=10.1037/fam0000191
An article summarizing the study’s major points and interview with Gershoff, where the first comment cites anecdotal evidence to rebut the findings - https://www.minnpost.com/second-opinion/2016/05/spanking-worsens-childrens-behavior-and-linked-long-term-harms-analysis-50-ye
An example of the type of bias mentioned in the video - http://www.ncbi.nlm.nih.gov/pubmed/11469313