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A fictional dataset, for testing and learning purposes, composed of basic/measurable and computed variables of the Munich ChronoType Questionnaire (MCTQ) micro (\(\mu\)) version.
This data was created following the guidelines in Ghotbi et al. (2020), in addition to the guidelines in Roenneberg, Wirz-Justice, & Merrow (2003), Roenneberg, Allebrandt, Merrow, & Vetter (2012), Jankowski (2017), and The Worldwide Experimental Platform (n.d.). See the References and Details sections to learn more.
Format
A tibble with 19 columns and 50 rows:
- id
A unique
integervalue to identify each respondent in the dataset.
Type: Control.
R class:integer.- shift_work
A
logicalvalue indicating if the respondent has been a shift- or night-worker in the past three months. \cr \cr Statement (EN): "I have been a shift- or night-worker in the past three months: Yes ( ___ ) No ( ___ )". \cr \cr Type: Basic. \cr \cr R class: [logical`]base::logical().- wd
Number of workdays per week.
Statement (EN): "Normally, I work ___ days/week".
Type: Basic.
R class:integer.- fd
Number of work-free days per week.
Type: Computed.
R class:integer.- so_w
Local time of sleep onset on workdays.
Statement (EN): "On WORKDAYS ... I normally fall asleep at ___ : ___ AM/PM (this is NOT when you get into bed, but rather when you fall asleep)".
Type: Basic.
R class:hms.- se_w
Local time of sleep end on workdays.
Statement (EN): "On WORKDAYS ... I normally wake up at ___ : ___ AM/PM (this is NOT when you get out of bed, but rather when you wake up)".
Type: Basic.
R class:hms.- sd_w
Sleep duration on workdays.
Type: Computed.
R class:Duration.- msw
Local time of mid-sleep on workdays.
Type: Computed.
R class:hms.- so_f
Local time of sleep onset on work-free days when the respondent doesn't use an alarm clock to wake up.
Statement (EN): "On WORK-FREE DAYS when I DON'T use an alarm clock ... I normally fall asleep at ___ : ___ AM/PM (this is NOT when you get into bed, but rather when you fall asleep)".
Type: Basic.
R class:hms.- se_f
Local time of sleep end on work-free days when the respondent doesn't use an alarm clock to wake up.
Statement (EN): "On WORK-FREE DAYS when I DON'T use an alarm clock ... I normally wake up at ___ : ___ AM/PM (this is NOT when you get out of bed, but rather when you wake up)".
Type: Basic.
R class:hms.- sd_f
Sleep duration on work-free days when the respondent doesn't use an alarm clock to wake up.
Type: Computed.
R class:Duration.- msf
Local time of mid-sleep on work-free days when the respondent doesn't use an alarm clock to wake up.
Type: Computed.
R class:hms.- sd_week
Average weekly sleep duration.
Type: Computed.
R class:Duration.- sloss_week
Weekly sleep loss.
Type: Computed.
R class:Duration.- msf_sc
Sleep-corrected local time of mid-sleep on work-free days.
Type: Computed.
R class:hms.- sjl_rel
Relative social jetlag.
Type: Computed.
R class:Duration.- sjl
Absolute social jetlag.
Type: Computed.
R class:Duration.- sjl_sc_rel
Jankowski's relative sleep-corrected social jetlag.
Type: Computed.
R class:Duration.- sjl_sc
Jankowski's sleep-corrected social jetlag.
Type: Computed.
R class:Duration.
Details
micro_mctq is a tidied, validated, and transformed version of
raw_data("micro_mctq.csv").
Guidelines
To learn more about the Munich ChronoType Questionnaire (MCTQ), see Roenneberg, Wirz-Justice, & Merrow (2003), Roenneberg, Allebrandt, Merrow, & Vetter (2012), Roenneberg et al. (2015), and Roenneberg, Pilz, Zerbini, & Winnebeck (2019).
To know about different MCTQ versions, see Juda, Vetter, & Roenneberg (2013) and Ghotbi et.al (2020).
To learn about the sleep-corrected social jetlag, see Jankowski (2017).
If you're curious about the variable computations and want to have access to the full questionnaire, see The Worldwide Experimental Platform (n.d.).
Data building and data wrangling
This dataset was created by randomized sampling (see
random_mctq()) and by manual insertions of special
cases. Its purpose is to demonstrate common cases and data issues that
researchers may find in their MCTQ data, in addition to be a suggested data
structure for MCTQ data.
You can see the micro_mctq build and data wrangling processes
here.
Variable naming
The naming of the variables took into account the naming scheme used in MCTQ publications, in addition to the guidelines of the tidyverse style guide.
Variable classes
The mctq package works with a set of object classes specially created to
hold time values. These classes can be found in the hms
and lubridate package.
Duration objects
If you prefer to view Duration objects as
hms objects, run
pretty_mctq(micro_mctq).
References
Ghotbi, N., Pilz, L. K., Winnebeck, E. C., Vetter, C., Zerbini, G., Lenssen, D., Frighetto, G., Salamanca, M., Costa, R., Montagnese, S., & Roenneberg, T. (2020). The \(\mu\)MCTQ: an ultra-short version of the Munich ChronoType Questionnaire. Journal of Biological Rhythms, 35(1), 98-110. doi:10.1177/0748730419886986
Jankowski K. S. (2017). Social jet lag: sleep-corrected formula. Chronobiology International, 34(4), 531-535. doi:10.1080/07420528.2017.1299162
Juda, M., Vetter, C., & Roenneberg, T. (2013). The Munich ChronoType Questionnaire for shift-workers (MCTQ\(^{Shift}\)). Journal of Biological Rhythms, 28(2), 130-140. doi:10.1177/0748730412475041
Roenneberg T., Allebrandt K. V., Merrow M., & Vetter C. (2012). Social jetlag and obesity. Current Biology, 22(10), 939-43. doi:10.1016/j.cub.2012.03.038
Roenneberg, T., Keller, L. K., Fischer, D., Matera, J. L., Vetter, C., & Winnebeck, E. C. (2015). Human activity and rest in situ. In A. Sehgal (Ed.), Methods in Enzymology (Vol. 552, pp. 257-283). Academic Press. doi:10.1016/bs.mie.2014.11.028
Roenneberg, T., Pilz, L. K., Zerbini, G., & Winnebeck, E. C. (2019). Chronotype and social jetlag: a (self-) critical review. Biology, 8(3), 54. doi:10.3390/biology8030054
Roenneberg, T., Wirz-Justice, A., & Merrow, M. (2003). Life between clocks: daily temporal patterns of human chronotypes. Journal of Biological Rhythms, 18(1), 80-90. doi:10.1177/0748730402239679
The Worldwide Experimental Platform (n.d.). MCTQ. https://www.thewep.org/documentations/mctq/
See also
Other datasets:
shift_mctq,
std_mctq