Title

speedergles -- Computation of the GLES response speed index

Syntax

speedergles varlist [if exp] [in range]
[, options]

where varlist is a list of numeric response time
variables.

Required
duration(varname) variable containing the interview duration

indexname(newvar) generates a variable for the GLES response speed index

flagname(newvar) generates a flag variable for speeding respondents
(i.e., respondents in the lowest decile of the response speed index)

Optional
missing(numlist) list of missing values in response time and/or duration variables

quietly suppresses the output of additional descriptives

Description

The speedergles command computes the response speed index of
the German Longitudinal Election Study (GLES) developed by Roßmann (2012). The
GLES response speed index is computed on the basis of question block, page or item
level response times and the overall interview duration. The index values can be
interpreted as a measure of the mean response speed of a respondent.
An index value of 1 is equivalent to the mean of the respondents´ mean response
speed in the selected sample of respondents. Index values close to 0 indicate a
very fast mean response speed, whereas values close to 2 indicate a very
slow mean response speed.

The response times variables specified in varlist are
preferably question block, page or item level measures. Ideally, response times
are measured on the item level, have a high resolution (s or ms), and are
available for every item in the survey.

Examples

Noisily computing the response speed index with data from
the GLES Long-term Online Tracking, T25 (ZA5725) for respondents who completed
the interview.

. speedergles zstart-zende if compl==1, dur(duration) index(speederindex)
flag(speederflag)

Quietly computing the response speed index with scientific
use file data from the GLES Saxony state election survey (ZA5738).

. speedergles zstart-zende, dur(duration) index(speederindex)
flag(speederflag) quietly

Quietly computing the response speed index with data from wave 2
of the GLES Short-term Campaign Panel(ZA5704). The values -99 and 0 in the
response time and duration variables are set to missing.

. speedergles T_kp2_Startseite-T_kp2_4270s if w2b==1, dur(duration)
index(speederindex) flag(speederflag) miss(-99 0) quietly

References

Roßmann, J. (2012): Zeitunterschreiter in Web-Befragungen der GLES:
Messung und Bedeutung für die Identifikation von Satisficern. [Speeding
respondents in web surveys of the GLES: Measurement and implications for
the identification of satisficing respondents.] Unpublished paper.

Author

Joss Roßmann, GESIS - Leibniz Institute for the Social Sciences, joss.rossmann@gesis.org

Recommended citation (APA Style, 6th ed.):

Roßmann, J. (2015): SPEEDERGLES: Stata module for the computation
of the GLES response speed index (Version: 1.0) [Computer Software].
Chestnut Hill, MA: Boston College.

Acknowledgments

The author would like to acknowledge the support of GESIS - Leibniz
Institute for the Social Sciences and the pricipal investigators of the German
Longitudinal Election Study (GLES) for their support in the creation of this
Stata module.