Some sobering statistics about psychological data

I've been catching up on some of the recent articles that have dealt with data quality issues in psychology. Here are three sobering statistics:

1. By some estimates, only about 1% of papers published in psychology since 1900 have involved replications (Makel et al., 2012).
2. Under certain not unreasonable assumptions, approximately one-third of published results in psychology may be false positives (Pashler & Harris, 2012).
3. Even for recently published papers, approximately 70% of requests for raw data end in failure (Wicherts et al., 2006).

So, if your research depends on a previous result (and whose doesn't to some extent?), start your experiment series with a direct replication, and publish your raw data.