{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T00:31:06Z","timestamp":1791073866732,"version":"4.1.0"},"reference-count":33,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2013,12,6]],"date-time":"2013-12-06T00:00:00Z","timestamp":1386288000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100009045","name":"Jagiellonian University Medical College","doi-asserted-by":"crossref","award":["K\/ZBW\/000168"],"award-info":[{"award-number":["K\/ZBW\/000168"]}],"id":[{"id":"10.13039\/100009045","id-type":"DOI","asserted-by":"crossref"}]},{"name":"Jagiellonian University","award":["K\/ZDS\/003516"],"award-info":[{"award-number":["K\/ZDS\/003516"]}]},{"name":"Ministry of Science and Higher Education","award":["N N 106 283935"],"award-info":[{"award-number":["N N 106 283935"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Sleep Research"],"published-print":{"date-parts":[[2014,6]]},"abstract":"<jats:title>Summary<\/jats:title><jats:p>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 (<jats:italic>n\u00a0<\/jats:italic>=<jats:italic>\u00a0<\/jats:italic>102, females, mean age 22.5\u00a0\u00b1\u00a01.9\u00a0years) completed the form several times during 1\u00a0week in June (while preparing for examinations) and on a free day in September; a total of 460 forms were collected. The final, 26\u2010item version of the scale was validated in a sleep deficit experiment lasting 1\u00a0week, conducted with 25 female participants (mean age 23.4\u00a0\u00b1\u00a01.9\u00a0years). 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 <jats:styled-content style=\"fixed-case\">CHIC<\/jats:styled-content>a 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\u2010h daily sleep restriction over a period of 1\u00a0week; 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. <jats:styled-content style=\"fixed-case\">CHIC<\/jats:styled-content>a may be helpful in research on inter\u2010and intra\u2010individual differences and on the efficacy of various counteractive treatments for the consequences of sleep deprivation.<\/jats:p>","DOI":"10.1111\/jsr.12115","type":"journal-article","created":{"date-parts":[[2013,12,6]],"date-time":"2013-12-06T07:32:39Z","timestamp":1386315159000},"page":"341-348","source":"Crossref","is-referenced-by-count":9,"title":["Measuring individual vulnerability to sleep loss\u2014the <scp>CHIC<\/scp>a scale"],"prefix":"10.1111","volume":"23","author":[{"given":"Halszka","family":"Oginska","sequence":"first","affiliation":[{"name":"Department of Neuroergonomics Institute of Applied Psychology Jagiellonian University Krakow Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Justyna","family":"Mojsa\u2010Kaja","sequence":"additional","affiliation":[{"name":"Department of Neuroergonomics Institute of Applied Psychology Jagiellonian University Krakow Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Magdalena","family":"Fafrowicz","sequence":"additional","affiliation":[{"name":"Department of Neuroergonomics Institute of Applied Psychology Jagiellonian University Krakow Poland"},{"name":"Department of Neurobiology Malopolska Centre of Biotechnology Jagiellonian University Krakow Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tadeusz","family":"Marek","sequence":"additional","affiliation":[{"name":"Department of Neuroergonomics Institute of Applied Psychology Jagiellonian University Krakow Poland"},{"name":"Department of Neurobiology Malopolska Centre of Biotechnology Jagiellonian University Krakow Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2013,12,6]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-3999(00)00194-X"},{"key":"e_1_2_8_3_1","doi-asserted-by":"crossref","first-page":"573","DOI":"10.1093\/sleep\/29.4.573","article-title":"Sleepiness enhances distraction during a monotonous task","volume":"29","author":"Anderson C.","year":"2006","journal-title":"Sleep"},{"key":"e_1_2_8_4_1","first-page":"267","article-title":"Cumulative sleepiness, mood disturbance, and psychomotor vigilance performance decrements during a week of sleep restricted to 4\u20135\u00a0hours per night","volume":"20","author":"Dinges D. 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