Skillet (band) Tour). In fall of 2009, Skillet began touring with Hawk Nelson, Decyfer Down, and The Letter Black to promote Skillet's album "Awake". The Awake & Alive Tour encompassed 52 cities from October through January. Skillet appeared at the 2009 Night of Joy Christian rock festival at Disney's Hollywood Studios at Walt Disney World. This marked the band's first absence from Universal Studios Orlando's Rock the Universe in five years due to conflicting schedules. However, they were able to perform the following year, in 2010. On September 26, 2009, Skillet appeared at Awakening Music Festival in Leesburg, Virginia, alongside Jeremy Camp,
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