000			01953nam a22002657a 4500
003			ZW-GwMSU
005			20221215132214.0
008			221215b |||||||| |||| 00| 0 eng d
040			_aMSU _cMSU _erda
100			_aDeng, Nina _eauthor
245			_aA review of DIMPACK version 1.0: conditional covariance–based test dimensionality analysis package _ccreated by Nina Deng, Kyung T. Han, Ronald K. Hambleton
264			_aUSA : _bSage; _c2013
336			_2rdacontent _atext _btxt
337			_2rdamedia _aunmediated _bn
338			_2rdacarrier _avolume _bnc
440			_vVolume , number ,
520			_aDIMPACK Version 1.0 for assessing test dimensionality based on a nonparametric conditional covariance approach is reviewed. This software was originally distributed by Assessment Systems Corporation and now can be freely accessed online. The software consists of Windows-based interfaces of three components: DIMTEST, DETECT, and CCPROX/HAC, which conduct hypothesis test for unidimensionality, cluster items, and perform hierarchical cluster analysis, respectively. Two simulation studies were conducted to evaluate the software in confirming test unidimensionality (a Type I error study) and detecting multidimensionality (a statistical power study). The results suggested that different data always be used in selecting assessment subtest items independent of calculating the DIMTEST statistic. The Type I error rate was excessively inflated otherwise. The statistical power was found low when sample size was small or the dimensions were highly correlated. It is suggested that some major changes be made to the software before it can be successfully useful among practitioners.
650			_aTest dimensionality
650			_aDIMPACK
650			_aItem response theory software
700			_aHan, Kyung T. _eauthor
700			_aHambleton, Ronald K. _eauthor
856			_uhttps://doi/10.1177/0146621612465487
942			_2lcc _cJA
999			_c160783 _d160783