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Discriminant validity where there should be none: positioning same-scale items in separated blocks of a questionnaire

Bert Weijters UGent, Alain De Beuckelaer UGent and Hans Baumgartner (2014) APPLIED PSYCHOLOGICAL MEASUREMENT. 38(6). p.450-463
abstract
In questionnaires, items can be presented in a grouped format (same-scale items are presented in the same block) or in a randomized format (items from one scale are mixed with items from other scales). Some researchers have advocated the grouped format because it enhances discriminant validity. The current study demonstrates that positioning items in separate blocks of a questionnaire may indeed lead to increased discriminant validity, but this can happen even in instances where discriminant validity should not be present. In particular, the authors show that splitting an established unidimensional scale into two arbitrary blocks of items separated by unrelated buffer items results in the emergence of two clearly identifiable but artificial factors that show discriminant validity.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
VARIABLES, FORMAT, STABILITY, RELIABILITY, ACQUIESCENCE, STYLE, CONVERGENT, confirmatory factor analysis, discriminant validity, grouping (survey) items, inter-item correlation, randomizing (survey) items, response styles, survey methods
journal title
APPLIED PSYCHOLOGICAL MEASUREMENT
volume
38
issue
6
pages
450 - 463
Web of Science type
Article
Web of Science id
000341434000003
JCR category
SOCIAL SCIENCES, MATHEMATICAL METHODS
JCR impact factor
1.178 (2014)
JCR rank
20/46 (2014)
JCR quartile
2 (2014)
ISSN
0146-6216
DOI
10.1177/0146621614531850
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
5815423
handle
http://hdl.handle.net/1854/LU-5815423
date created
2015-01-22 21:45:18
date last changed
2016-12-19 15:38:57
@article{5815423,
  abstract     = {In questionnaires, items can be presented in a grouped format (same-scale items are presented in the same block) or in a randomized format (items from one scale are mixed with items from other scales). Some researchers have advocated the grouped format because it enhances discriminant validity. The current study demonstrates that positioning items in separate blocks of a questionnaire may indeed lead to increased discriminant validity, but this can happen even in instances where discriminant validity should not be present. In particular, the authors show that splitting an established unidimensional scale into two arbitrary blocks of items separated by unrelated buffer items results in the emergence of two clearly identifiable but artificial factors that show discriminant validity.},
  author       = {Weijters, Bert and De Beuckelaer, Alain and Baumgartner, Hans},
  issn         = {0146-6216},
  journal      = {APPLIED PSYCHOLOGICAL MEASUREMENT},
  keyword      = {VARIABLES,FORMAT,STABILITY,RELIABILITY,ACQUIESCENCE,STYLE,CONVERGENT,confirmatory factor analysis,discriminant validity,grouping (survey) items,inter-item correlation,randomizing (survey) items,response styles,survey methods},
  language     = {eng},
  number       = {6},
  pages        = {450--463},
  title        = {Discriminant validity where there should be none: positioning same-scale items in separated blocks of a questionnaire},
  url          = {http://dx.doi.org/10.1177/0146621614531850},
  volume       = {38},
  year         = {2014},
}

Chicago
Weijters, Bert, Alain De Beuckelaer, and Hans Baumgartner. 2014. “Discriminant Validity Where There Should Be None: Positioning Same-scale Items in Separated Blocks of a Questionnaire.” Applied Psychological Measurement 38 (6): 450–463.
APA
Weijters, B., De Beuckelaer, A., & Baumgartner, H. (2014). Discriminant validity where there should be none: positioning same-scale items in separated blocks of a questionnaire. APPLIED PSYCHOLOGICAL MEASUREMENT, 38(6), 450–463.
Vancouver
1.
Weijters B, De Beuckelaer A, Baumgartner H. Discriminant validity where there should be none: positioning same-scale items in separated blocks of a questionnaire. APPLIED PSYCHOLOGICAL MEASUREMENT. 2014;38(6):450–63.
MLA
Weijters, Bert, Alain De Beuckelaer, and Hans Baumgartner. “Discriminant Validity Where There Should Be None: Positioning Same-scale Items in Separated Blocks of a Questionnaire.” APPLIED PSYCHOLOGICAL MEASUREMENT 38.6 (2014): 450–463. Print.