Oggy Oggy Oggy other side of the River Tamar. "Oggy" is a slang term for a Cornish pasty, derived from its Cornish name, ""hoggan"", and was used by local Devon and Cornish sailors at the Devonport Dockyard in reference to pasty sellers who once stood outside the gates. The Devonport marines are still associated with the song which they generally sing at public displays. Tin-miners' wives or pasty sellers supposedly shouted ""Oggy Oggy Oggy"" – the response from any hungry miner or labourer would be "Oi!, Oi!, Oi!." The chant is also the chorus of a folk song and has always been heard
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