Skillet (band) January 27, 2017 the band released a new recording of "Stars" with an acoustic style, which was included in the film, "The Shack". On November 17, 2017, they released a deluxe edition, "Unleashed Beyond", containing new material such as "Breaking Free", featuring Lacey Sturm and remixes of "Feel Invincible" and "The Resistance". Skillet also released a five-track EP containing remixes of "Feel Invincible". This was available to anyone who pre-ordered "Unleashed Beyond" from their website. The band's style has been described as Christian rock, Christian metal, alternative rock, hard rock, nu metal, and symphonic metal. The band's eponymous debut album
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