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[Maturing]

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.

Usage

micro_mctq

Format

A tibble with 19 columns and 50 rows:

id

A unique integer value to identify each respondent in the dataset.

Type: Control.

R class: integer.

shift_work

A logical value 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.

Source

Created by Daniel Vartanian (package author).

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). London, UK: 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