delta computes the generalized delta index of scale discrimination developed by Hankins (2007) based on the original work of Ferguson (1949). This index measures the scale's ability to distinguish between individuals. A value of 1 indicates that the test has maximal discrimination (all possible scores occur with the same frequency) and a value of 0 means that the test has minimal discrimination (all the respondents have the same score). A value of 0.9 results from a set of scores that is normally distributed. A value of 1 is observed if the scores follow a uniform distribution. Individuals with a missing score are omitted.
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Publisher Info
Software component provided by Boston College Department of Economics in its series Statistical Software Components with number
S456851.
Size: Programming language: Stata Requires: Stata version 7 Date of creation: 23 Jun 2007 Date of revision:
12 Mar 2008 Handle: RePEc:boc:bocode:s456851
Note: This module may be installed from within Stata by typing "ssc install delta". Windows users should not attempt to download these files with a web browser. Contact details of provider: Postal: Boston College, 140 Commonwealth Avenue, Chestnut Hill MA 02467 USA Phone: 617-552-3670 Fax: +1-617-552-2308 Email: Web page: http://fmwww.bc.edu/EC/ More information through EDIRC