Posts in General Psychology
Statistics Explained: Mean and Standard Deviation (And Why Experts Should Not Ignore Them)

Psychological experts who do not use reliable tests built around solid scientific principles run the risk of highly unreliable opinions. This is where an understanding of means and standard deviations become extremely important.

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Statistics Explained, Forensic Psychology, General Psychology, Expert WitnessMax Wachtelnormal distribution, psychology, forensic psychology, mean, standard deviation
Statistics Explained: Sensitivity vs. Specificity (with Positive Predictive Power thrown in)

What is the difference between sensitivity and specificity, and what are you missing if you ignore positive predictive power? The answers to these questions can help bolster an expert’s opinions in the eyes of the judge or jury.

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Expert Witness, Forensic Psychology, General Psychology, Statistics ExplainedMax Wachtelstatistics, forensic psychology, sensitivity, specificity, positive predictive power, reliability, Expert Witness