Kseniya Bobrova et al
Toward the Cross-Cultural Comparison of Multi-Dimension Structure of Individual Patterns of Sleep-Wake Behavior
Kseniya Bobrova, Kamilla Urakaeva, Olga Lopaeva and Mike Onishenko
- Such individual abilities as productivity and emotional
performances are related to sleep-wake habits. That is why
the investigations of individual chronotypological differences
are of a great importance for applied psychological areas,
i.e. for such a purpose as professional selection on tolerance
to shift and night work. In this project we are asking two
main questions. How many individual traits of sleep-wake
pattern might be assessed by means of chronotypological
questionnaires? And To which extent there traits are universal,
i.e might be found in people of different nationalities
and ethnicities, have genetically determined background,
based on the internal time measuring systems, etc.?
- The chronobiological questionnaires
are mostly based on unidimensional approaches to biorhythmic
typology. The majority of them were designed to distinguish
between morning and evening types. Therefore, they consider
moningness-eveningness construct as further non-divided.
Only two, but quite independent studies of psychometrical
features of chronobiological questionnaires provided solid
arguments against the uniscale approaches to assessment
of individual traits of sleep-wake cycle. These studies
- one was carried out in Siberia and another was mostly
done on the Australian populations - are based one rather
big samples and application of conventional psychomentric
analysis for treating self-assessed chronobiological characters.
The analyses of factor structure of 52-statement SWPAQ (Putilov,
1993, 2000) and 38-statement LOCI (Roberts, 1997) revealed
5 and 3 dimensions, respectively.
- Both questionnaires point on
two similar dimensions. These dimensions correspond to morning
and evening scales, and seem to be rather weekly related
one to another. The correspondence of the 3rd dimension
of LOCI ("Propensity for sleep dept") to the dimensions
of SWPAQ is not clear. Similar to the morning scales of
the LOCI and SWPAQ, these statements represent the habits
of sleep-wake behavior in the morning hours. Besides, most
items of this dimension look similar to the statements from
one of three sub-dimensions (tetrads) of the morning scale
of the SWPAQ. However, several other items correspond to
the statements from other SWPAQ scales. On the present step
of the project we are trying to clarify the relationship
between the dimensions of the SWPAQ and LOCI.
- The LOCI was translated from English
(see Appendix 1) and used together with the SWPAQ (see Appendix
2) to assess chronotypological profiles of 159 respondents,
approximately 70% of them were students. Age of the respondents
ranged from 15 to 56.
- Now we plan to collect data from
age- and sex-matched samples of non-Russian speakers living
in other parts of the world (i.e. Australia, Germany, Sri-Lanka)
and/or belonging to other than Russian ethnicity and nationality.
Comparison of these samples in terms of the factor structure
of the combined (90-item) questionnaire will help to clarify
the status of the third dimension of the Australian questionnaire,
and the number of dimensions (5 or 6) that might be assessed
with the Australian and Russian questionnaires. On the next
step of the project the questionnaires will be used in the
cross-cultural and human genetics researches.