explains the deficiencies of p values and null hypothesis significance testing, and provides many examples of how to use confidence intervals and estimation. The accompanying ESCI software includes many interactive simulations that encourage exploration of confidence intervals, and replication and prediction. ESCI also calculates and graphs confidence intervals for a useful range of measures and designs. To download a copy of the ESCI software, see the entry on the Software Page. Geoff's short broadcast talk gives the main message--see here for a transcript and podcast. For a demonstration of the deficiencies of p values, see the "Dance of the p values".
The Forecasting Principles site summarizes all useful knowledge about forecasting so that it can be used by researchers, practitioners, and educators. The site is devoted to improving decision making by furthering scientific forecasting.