Skillet (band) of Christian Music since their song "Monster" has garnered over 2.6 million sales. It was certified 2x Platinum by the RIAA, was the number one streaming Christian song of 2015, and was the number eight streaming rock song of 2015. Skillet (band) Skillet is an American Christian rock band formed in Memphis, Tennessee in 1996. The band currently consists of husband John (lead vocals, bass) and wife Korey Cooper (rhythm guitar, keyboards, backing vocals) along with Jen Ledger (drums, vocals) and Seth Morrison (lead guitar). The band has released ten albums, with two, "Collide" and "Comatose", receiving Grammy nominations. Two
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