Taking the classical large audience university lecture online using tablet computer and webconferencing facilities

During three offerings of the course Introduction to Statistics at DTU the lecturing was carried out 100% through a tablet computer combined with the web conferencing facility Adobe Connect as an aid to record and share the lectures as well simultaneously as for creating videos for subsequent viewing. It will be described exactly how this can be done using simple audio and video equipment. A quantitative and qualitative analysis of the course evaluations are given to document how (positive) students reacted on the initiative. In June 2011 the experience from a fourth offering during the spring 2011 is included

lmerTest Package: Tests in Linear Mixed Effects Models

One of the frequent questions by users of the mixed model function lmer of the lme4 package has been: How can I get p values for the F and t tests for objects returned by lmer? The lmerTest package extends the 'lmerMod' class of the lme4 package, by overloading the anova and summary functions by providing p values for tests for fixed effects. We have implemented the Satterthwaite's method for approximating degrees of freedom for the t and F tests. We have also implemented the construction of Type I - III ANOVA tables. Furthermore, one may also obtain the summary as well as the anova table using the Kenward-Roger approximation for denominator degrees of freedom (based on the KRmodcomp function from the pbkrtest package). Some other convenient mixed model analysis tools such as a step method, that performs backward elimination of nonsignificant effects - both random and fixed, calculation of population means and multiple comparison tests together with plot facilities are provided by the package as well