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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) standard version.
This data was created following 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 39 columns and 50 rows:
- id
A unique
integervalue to identify each respondent in the dataset.
Type: Control.
R class:integer.- work
A
logicalvalue indicating if the respondent has a regular work schedule.
Statement (EN): "I have a regular work schedule (this includes being, for example, a housewife or househusband): Yes ( ___ ) No ( ___ )".
Type: Basic.
R class:logical.- wd
Number of workdays per week.
Statement (EN): "I have a regular work schedule and work ___ days per week".
Type: Basic.
R class:integer.- fd
Number of work-free days per week.
Type: Computed.
R class:integer.- bt_w
Local time of going to bed on workdays.
Statement (EN): "I go to bed at ___ o'clock'".
Type: Basic.
R class:hms.- sprep_w
Local time of preparing to sleep on workdays.
Statement (EN): "I actually get ready to fall asleep at ___ o'clock".
Type: Basic.
R class:hms.- slat_w
Sleep latency or time to fall asleep after preparing to sleep on workdays.
Statement (EN): "I need ___ minutes to fall asleep".
Type: Basic.
R class:Duration.- so_w
Local time of sleep onset on workdays.
Type: Computed.
R class:hms.- se_w
Local time of sleep end on workdays.
Statement (EN): "I wake up at ___ o'clock".
Type: Basic.
R class:hms.- si_w
"Sleep inertia" on workdays.
Despite the name, this variable represents the time the respondent takes to get up after sleep end.
Statement (EN): "After ___ minutes, I get up".
Type: Basic.
R class:Duration.- gu_w
Local time of getting out of bed on workdays.
Type: Computed.
R class:hms.- alarm_w
A
logicalvalue indicating if the respondent uses an alarm clock to wake up on workdays.
Statement (EN): "I use an alarm clock on workdays: Yes ( ___ ) No ( ___ )".
Type: Basic.
R class:logical.- wake_before_w
A
logicalvalue indicating if the respondent regularly wakes up before the alarm rings on workdays.
Statement (EN): "If "Yes": I regularly wake up BEFORE the alarm rings: Yes ( ___ ) No ( ___ )".
Type: Basic.
R class:logical.- sd_w
Sleep duration on workdays.
Type: Computed.
R class:Duration.- tbt_w
Total time in bed on workdays.
Type: Computed.
R class:Duration.- le_w
Light exposure on workdays.
Statement (EN): "On average, I spend the following amount of time outdoors in daylight (without a roof above my head)".
Type: Extra.
R class:Duration.- msw
Local time of mid-sleep on workdays.
Type: Computed.
R class:hms.- bt_f
Local time of going to bed on work-free days.
Statement (EN): "I go to bed at ___ o'clock'".
Type: Basic.
R class:hms.- sprep_f
Local time of preparing to sleep on work-free days.
Statement (EN): "I actually get ready to fall asleep at ___ o'clock".
Type: Basic.
R class:hms.- slat_f
Sleep latency or time to fall asleep after preparing to sleep on work-free days.
Statement (EN): "I need ___ minutes to fall asleep".
Type: Basic.
R class:Duration.- so_f
Local time of sleep onset on work-free days.
Type: Computed.
R class:hms.- se_f
Local time of sleep end on work-free days.
Statement (EN): "I wake up at ___ o'clock".
Type: Basic.
R class:hms.- si_f
"Sleep inertia" on work-free days.
Despite the name, this variable represents the time the respondent takes to get up after sleep end.
Statement (EN): "After ___ minutes, I get up".
Type: Basic.
R class:Duration.- gu_f
Local time of getting out of bed on work-free days.
Type: Computed.
R class:hms.- alarm_f
A
logicalvalue indicating if the respondent uses an alarm clock to wake up on work-free days.
Statement (EN): "My wake-up time is due to the use of an alarm clock: Yes ( ___ ) No ( ___ )".
Type: Basic.
R class:logical.- reasons_f
A
logicalvalue indicating if the respondent has any particular reasons for why they cannot freely choose their sleep times on work-free days.
Statement (EN): "There are particular reasons why I cannot freely choose my sleep times on free days: Yes ( ___ ) No ( ___ )".
Type: Basic.
R class:logical.- reasons_why_f
Particular reasons for why the respondent cannot freely choose their sleep times on work-free days.
Statement (EN): "If "Yes": Child(ren)/pet(s) ( ___ ) Hobbies ( ___ ) Others ( ___ ), for example: ___".
Type: Basic.
R class:character.- sd_f
Sleep duration on work-free days.
Type: Computed.
R class:Duration.- tbt_f
Total time in bed on work-free days.
Type: Computed.
R class:Duration.- le_f
Light exposure on work-free days.
Statement (EN): "On average, I spend the following amount of time outdoors in daylight (without a roof above my head)".
Type: Extra.
R class:Duration.- msf
Local time of mid-sleep on work-free days.
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.- le_week
Average weekly light exposure.
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
std_mctq is a tidied, validated, and transformed version of
raw_data("std_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 std_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(std_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:
micro_mctq,
shift_mctq