Rape myth acceptance: investigating the dimensionality of the Illinois rape myth acceptance scale and the male rape myth scale.

Date
2023-12
Journal Title
Journal ISSN
Volume Title
Publisher
Stellenbosch : Stellenbosch University
Abstract
ENGLISH ABSTRACT: The measurement of rape myth acceptance has thus far been grounded in classical test theory, and rape myth acceptance scales have historically focused exclusively on either male or female rape myths. My research is an exploratory investigation into the dimensionality of the Illinois Rape Myth Acceptance Scale, the Male Rape Myth Scale, and the combined item pool of both measures. Using convenience sampling, I recruited 2,536 students from Stellenbosch University in South Africa. I conducted a series of dimensionality assessments under a bifactor analytic framework, to determine whether (a) one or both scales could be considered essentially unidimensional, and (b) whether both sets of items tap into the same underlying construct. The results of my dimensionality investigation indicate that both the Illinois Rape Myth Acceptance Scale and the Male Rape Myth scale can be treated as unidimensional under an item response theory framework, but not under a factor analytic framework. Furthermore, the male rape myths and female rape myths included in this study appear to tap into the same general rape myth acceptance dimension.
AFRIKAANSE OPSOMMING: Die meting van verkragtingsmite-aanvaarding is tot dusver gegrond binne klassieke toetsteorie, en verkragtingsmite-skale het histories uitsluitlik óf op manlike óf vroulike verkragtingsmites gefokus. My navorsing is ‘n verkennende ondersoek rondom die dimensionaliteit van die Illinois Rape Myth Acceptance Scale, die Male Rape Myth Scale, en die gekombineerde poel van items van beide meetinstrumente. By wyse van gerieflikheids-monsterneming het ek 2,536 studente van die Universiteit Stellenbosch in Suid-Afrika gewerf. Ek het ‘n reeks dimensionaliteitsassesserings onderneem binne ‘n bifaktor analitiese raamwerk om vas te stel of (a) een of albei skale basies as eendimensioneel beskou kan word, en (b) of beide stelle items op dieselfde onderliggende konstruk berus. Die resultate van my dimensionaliteitsondersoek dui aan dat beide die Illinois Rape Myth Acceptance Scale en die Male Rape Myth Scale binne ‘n itemresponsteorie-raamwerk as eendimensioneel behandel kan word, maar nie binne ‘n faktor-analitiese raamwerk nie. Verder berus die manlike verkragtingsmites en vroulike verkragtingsmites wat binne hierdie studie ingesluit is klaarblyklik op dieselfde algemene verkragtingsmite-aanvaardingsdimensie.
Description
Thesis (MA)--Stellenbosch University, 2023.
Keywords
rape myth acceptance, bifactor modelling, dimensionality assessment, item response theory
Citation