Awake (Skillet album) Awake (Skillet album) Awake is the seventh album by American Christian rock band Skillet. It is the follow-up to their Grammy-nominated album "Comatose". The album was released August 25, 2009 by Lava Records and Ardent Records and debuted at No. 2 on the "Billboard" 200. The album was certified gold by the Recording Industry Association of America (RIAA) on July 27, 2010, and has since gone double platinum, selling over 2,000,000 copies to date. It was nominated for Top Christian Album at the "Billboard" Music Awards 2011 and won. This is the last album to feature guitarist Ben Kasica and
Differential item functioning Differential item functioning Differential item functioning (DIF) is a statistical characteristic of an item that shows the extent to which the item might be measuring different abilities for members of separate subgroups. Average item scores for subgroups having the same overall score on the test are compared to determine whether the item is measuring in essentially the same way for all subgroups. The presence of DIF requires review and judgment, and it does not necessarily indicate the presence of bias. DIF analysis provides an indication of unexpected behavior of items on a test. An item does not display DIF if