Fits and tests meta regression models and generates a number of useful test statistics: next to t- and z-tests, the likelihood ratio, bartlett corrected likelihood ratio and permutation tests are performed on the model coefficients.
The metatest package fits meta regression models and computes various statistics to test the significance of the coefficients.
Changes in version 1.0-5 o Added registration of S3 methods.
Changes in version 1.0-4 o Replaced calls to as.real (soon to be deprecated) by as.double.
Changes in version 1.0-3 o Fixed a bug in the degrees of freedom for the t-test (was n-1, now is n-ncol(x), where x is the design matrix). Note that the Huizenga et al paper also contains this error.
Changes in version 1.0-2 o Updated the reference to our paper which has appeared in the British Journal of Mathematical and Statistical Psychology.
Changes in version 1.0-1
o Fixed a bug in the p-value of the test of the significance of the likelihood ratio test of the between studies variance which is by default divided by 2 (as per Berkhof & Snijders, 2001), which led to odd results (ie p-value of 0.5) when the ratio is zero. This has now been set to the value of 1.
Berkhof, J., Snijders, T. A. B. (2001). Variance Component Testing in Multilevel Models. Journal of Educational and Behavioral Statistics, 26(2): 133-152. Available at: http://jeb.sagepub.com/cgi/doi/10.3102/10769986026002133 [Accessed January 19, 2011].
First version released on CRAN: 1.0-0