Bad psychology results

A blog reports:

Around 18% of statistical results in the psychological literature are incorrectly reported. ...

To obtain a better understanding of the origins of the errors made in the reporting of statistics, we contacted the authors of the articles with errors in the second study and asked them to send us the raw data. Regrettably, only 24% of the authors shared their data, despite our request being quite specific and our assurances that the authors would remain anonymous. . .

I would guess that another 50% of the published social science results are wrong just because of faulty data handling. Such errors are nearly impossible to detect if the authors refuse to share their raw data.