Understanding the new statistics : effect sizes confidence intervals and meta analysis Introduction to the new statistics From null hypothesis significance testing to effect sizes Confidence intervals Confidence intervals error bars and p values Replication Two simple designs Meta analysis 1: introduction and forest plots Meta analysis 2: models Meta analysis 3: larger scale analyses The noncentral t distribution Cohens d Power Precision for planning Correlations proportions and further effect size measures More complex designs and the new statistics in practice