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On Minimizing Guessing Effects on Multiple‐Choice Items: Superiority of a two solutions and three distractors item format to a one solution and five distractors item format
Author(s) -
Kubinger Klaus D.,
HolocherErtl Stefana,
Reif Manuel,
Hohensinn Christine,
Frebort Martina
Publication year - 2010
Publication title -
international journal of selection and assessment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.812
H-Index - 61
eISSN - 1468-2389
pISSN - 0965-075X
DOI - 10.1111/j.1468-2389.2010.00493.x
Subject(s) - psychology , multiple choice , rasch model , item response theory , cognitive psychology , social psychology , statistics , psychometrics , developmental psychology , mathematics , significant difference
Multiple‐choice response formats are troublesome, as an item is often scored as solved simply because the examinee may be lucky at guessing the correct option. Instead of pertinent Item Response Theory models, which take guessing effects into account, this paper considers a psycho‐technological approach to re‐conceptualizing multiple‐choice response formats. The free‐response format is compared with two different multiple‐choice formats: a traditional format with a single correct response option and five distractors (‘1 of 6’), and another with five response options, three of them being distractors and two of them being correct (‘2 of 5’). For the latter format, an item is scored as mastered only if both correct response options and none of the distractors are marked. After the exclusion of a few items, the Rasch model analyses revealed appropriate fit for 188 items altogether. The resulting item‐difficulty parameters were used for comparison. The multiple‐choice format ‘1 of 6’ differs significantly from the multiple‐choice format ‘2 of 5’, while the latter does not differ significantly from the free‐response format. The lower difficulty of items ‘1 of 6’ suggests guessing effects.