Handbook of Evidence-Based Psychodynamic Psychotherapy

Part of the series Current Clinical Psychiatry pp 367-377

The Perils of p-Values: Why Tests of Statistical Significance Impede the Progress of Research

An Open Letter to Psychotherapy Researchers

* Final gross prices may vary according to local VAT.

Get Access


Imagine that you conduct an experiment to determine whether a new form of psychotherapy is more effective than treatment as usual. You analyze the data and find them to be statistically significant with a p-value that is less than 5%. How accurately does the following paragraph describe your understanding of the meaning of these results?