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Item FN12CC was the only item to exhibit an outfit value higher than 1.5 (1.53).
A large outfit value for an easy item indicates that a high ability level student fails to respond to the question correctly, and vice versa.
None of the items had an infit value greater than 1.5 and only item KS20R had an outfit value greater than 1.5.
None of the items revealed inappropriate psychometric characteristics in this new analysis and, regarding the fit statistics for the person results, none of the students presented an outfit value that exceeded 1.5 and only one student (0.4 % of the sample) presented an outfit value above the reference value.
In this study a Infit and Outfit value below 1.3 was accepted.
After combining this response category with the adjacent category of "almost never" the outfit value reduced to 1.4.
Similar(52)
A PURPLE knit outfit, valued at $238, is left overnight in the dryer at a coin laundry and is gone the next morning.
None of the items yielded infit or outfit values that were greater than 1.5.
None of the items presented infit or outfit values greater than 1.5.
This item, along with items LB9R and LB10IC, had outfit values higher than 1.5.
Infit and outfit values should not be higher than 1.5 (Linacre, 2002).
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com