Measuring individual vulnerability to sleep loss : the CHICa scale

doi:10.1111/jsr.12115

Measuring individual vulnerability to sleep loss : ...

Bibliographic description

punktacja MNiSW [2014 A]: 30

title:	Measuring individual vulnerability to sleep loss : the CHICa scale
author:	Kontrymowicz-Ogińska Halszka , Mojsa-Kaja Justyna , Fąfrowicz Magdalena , Marek Tadeusz
Journal title:	Journal of Sleep Research
volume:	23
issue:	3
date of publication:	2014
pages:	341-348
ISSN:	0962-1105
eISSN:	1365-2869
DOI:	10.1111/jsr.12115
language:	English
Journal language:	English
abstract in english:	The aim of this project was to construct a psychometrically satisfying scale to describe subjective reactions to sleep deprivation. First, on the basis of a literature review, a list of items was generated which reflected the negatively affected mood and reduced wellbeing associated with sleep loss. Additionally, psychology students were asked to describe their cognitive and emotional symptoms following a night with curtailed sleep. As a result, 69 items were included in the experimental set. University students (n = 102, females, mean age 22.5 ± 1.9 years) completed the form several times during 1 week in June (while preparing for examinations) and on a free day in September; a total of 460 forms were collected. The final, 26-item version of the scale was validated in a sleep deficit experiment lasting 1 week, conducted with 25 female participants (mean age 23.4 ± 1.9 years). Factor analysis showed 71.7% of total variance explained by four components: impaired thermoregulation (C for cold), disrupted appetite (H for hunger), affective problems (I for irritability) and lowered level of cognitive functioning (Ca for cognitive attenuation). A Polish version of the CHICa scale showed satisfactory psychometric properties. Cronbach's alpha of the subscales were between 0.90 and 0.95. All four subscales exhibited a significant increase with an experimental 3-h daily sleep restriction over a period of 1 week; cognitive attenuation was the most symptomatic. Cognitive problems (reduced concentration, comprehension and accuracy) and a lack of energy seem to be the most specific subjective manifestations of the chronic sleep deficit state. CHICa may be helpful in research on inter-and intra-individual differences and on the efficacy of various counteractive treatments for the consequences of sleep deprivation.
keywords in english:	chronic sleep deprivation, individual differences, sleep deficit, sleep loss consequences
number of pulisher's sheets:	0,4
affiliation:	Wydział Zarządzania i Komunikacji Społecznej : Instytut Psychologii Stosowanej, Pion Prorektora ds. badań naukowych i funduszy strukturalnych : Małopolskie Centrum Biotechnologii
type:	journal article
subtype:	academic paper