Package: ResponseScan
Type: Package
Title: Quick Screening of Response Patterns in Test and Survey Items
Version: 0.4.1
Authors@R: person("Jose", "Ventura-Leon",
                   email = "jventuraleon@gmail.com",
                   role = c("aut", "cre"),
                   comment = c(ORCID = "0000-0003-2996-4244"))
Description: One call screens the item responses of a test or questionnaire
    for patterns that deserve a closer look before modelling: flat or
    long-string responding, low intra-individual variability, multivariate
    outliers, incoherent psychometric synonyms or even-odd halves, overuse of
    the midpoint or of the extremes, duplicated response vectors and
    identical patterns that arrive in series of consecutive submissions.
    Indices follow Curran (2016) <doi:10.1016/j.jesp.2015.07.006>; person fit
    in item response theory (the standardized log-likelihood) is optional,
    and cut-offs can be taken from a reference group. Results are returned
    per person, with flags, frequency tables of response patterns and plots.
    Whole batches of data (a second collection phase, one classroom) can be
    compared with a reference group: the item correlation structure, with
    permutation tests that leave out flat responders and match the response
    level, and the Jennrich (1970) <doi:10.1080/01621459.1970.10481133> test;
    the similarity of consecutive rows; and near-duplicate respondents.
    Flagged respondents can be removed in one step and the same confirmatory
    or exploratory factor model can be refitted with and without them.
License: GPL (>= 3)
Encoding: UTF-8
RoxygenNote: 7.3.2
Depends: R (>= 4.1)
Imports: ggplot2 (>= 3.4.0), stats, utils
Suggests: lavaan, mirt, testthat (>= 3.0.0)
LazyData: true
Config/testthat/edition: 3
NeedsCompilation: no
Packaged: 2026-10-25 13:09:01 UTC; PC
Author: Jose Ventura-Leon [aut, cre] (ORCID:
    <https://orcid.org/0000-0003-2996-4244>)
Maintainer: Jose Ventura-Leon <jventuraleon@gmail.com>
Repository: CRAN
Date/Publication: 2026-11-08 18:00:02 UTC
Built: R 4.6.2; ; 2026-11-09 00:52:43 UTC; windows
