[https://link.springer.com/article/10.1007/s00426-018-1066-8 Psychological Research] Meta-Analysis from 2018 showing a Hedge's g value of 1 for analgesia based on three studies between 1999 and 2010 (The Hedge's g statistic expresses the difference of the means in units of the pooled standard deviation) | [https://link.springer.com/article/10.1007/s00426-018-1066-8 Psychological Research] Meta-Analysis from 2018 showing a Hedge's g value of 1 for analgesia based on three studies between 1999 and 2010 (The Hedge's g statistic expresses the difference of the means in units of the pooled standard deviation) |