Furniture to allow a single person to sit down, which has a back and legs, as well as a platform for sitting. Chairs often feature cushions made from various fabrics. All different types of woods have unique signature marks that can help in easy identification of the type. Both hardwoods and softwoods are used in furniture manufacturing, and each has their own specific uses. Most commonly, quality furniture is made out of hardwood which is made from oak, maple, mahogany, teak, walnut, cherry and birch. Highest quality wood will have been air dried to rid it of its moisture. Furniture Furniture
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