{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,11]],"date-time":"2026-11-11T15:20:41Z","timestamp":1794410441849,"version":"4.9.0"},"reference-count":13,"publisher":"Cambridge University Press (CUP)","issue":"2","license":[{"start":{"date-parts":[[2009,7,9]],"date-time":"2009-07-09T00:00:00Z","timestamp":1247097600000},"content-version":"unspecified","delay-in-days":11392,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Psychol. Med."],"published-print":{"date-parts":[[1978,5]]},"abstract":"<jats:title>SYNOPSIS<\/jats:title><jats:p>A self-completion sleep evaluation questionnaire (SEQ), consisting of 10 cm line analogue rating scale questions, was constructed to investigate subjects' responses to aspects of sleep and early morning behaviour. The questions were grouped into 4 chronological areas: the ease of getting to sleep (GTS), the perceived quality of sleep (QOS), the ease of awakening from sleep (AFS), and the integrity of early morning behaviour following wakefulness (BFW). Five hundred and one SEQs were completed during several investigations into the comparative effectiveness of hypnotic drugs. The classical factor analysis produced 4 factors which corresponded to the 4 aspects of sleep and early morning behaviour listed above. The GTS and QOS factors were positively correlated (+ 0\u00b757), as were the AFS and BFW factors (+ 0\u00b748). The 2 sleeping state factors (GTS and QOS) were orthogonal to the 2 waking state factors (AFS and BFW).<\/jats:p>","DOI":"10.1017\/s0033291700014379","type":"journal-article","created":{"date-parts":[[2009,7,9]],"date-time":"2009-07-09T11:58:04Z","timestamp":1247140684000},"page":"325-329","source":"Crossref","is-referenced-by-count":197,"title":["Factor analysis of a sleep evaluation questionnaire"],"prefix":"10.1017","volume":"8","author":[{"given":"A. C.","family":"Parrott","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"I.","family":"Hindmarch","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2009,7,9]]},"reference":[{"key":"S0033291700014379_ref012","unstructured":"NATO (1972). Nato Symposium on sleep, Aviemore, Scotland."},{"key":"S0033291700014379_ref010","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2125.1977.tb00699.x"},{"key":"S0033291700014379_ref006","doi-asserted-by":"publisher","DOI":"10.1016\/0022-3999(74)90069-5"},{"key":"S0033291700014379_ref005","doi-asserted-by":"publisher","DOI":"10.1007\/BF00429085"},{"key":"S0033291700014379_ref004","doi-asserted-by":"publisher","DOI":"10.1192\/bjp.124.6.547"},{"key":"S0033291700014379_ref003","doi-asserted-by":"publisher","DOI":"10.1111\/j.2044-8341.1974.tb02285.x"},{"key":"S0033291700014379_ref002","doi-asserted-by":"publisher","DOI":"10.1007\/BF00423189"},{"key":"S0033291700014379_ref013","doi-asserted-by":"publisher","DOI":"10.1016\/0028-3908(71)90039-6"},{"key":"S0033291700014379_ref008","first-page":"2113","article-title":"A sub-chronic study of the subjective quality of sleep and psychological measures of performance on the morning following night time medication with temazepam","volume":"26","author":"Hindmarch","year":"1976","journal-title":"Arzneimittel-Forschung (Drug Research)"},{"key":"S0033291700014379_ref007","first-page":"1836","article-title":"A 1, 4-benzodiazepine, temazepam (K 3917), its effect on some psychological parameters of sleep and behaviour","volume":"25","author":"Hindmarch","year":"1975","journal-title":"Arzneimittel-Forschung (Drug Research)"},{"key":"S0033291700014379_ref001","unstructured":"Bixler E. O. , Scharf M. B. & Kales A. (1972). The effects of drugs on sleep and performance. In NATO Symposium: Aviemore, Scotland (Mimeograph)."},{"key":"S0033291700014379_ref011","doi-asserted-by":"publisher","DOI":"10.1136\/bmj.3.5661.23"},{"key":"S0033291700014379_ref009","article-title":"The effect of a subchronic administration of three dose levels (20, 30, 40 mg) of a 1, 5 benzodiazepine derivative, clobazam, on subjective assessments of sleep and aspects of psychomotor performance the morning following night time medication","author":"Hindmarch","year":"1978","journal-title":"Arzneimittel-Forschung (Drug Research) (in the press)"}],"container-title":["Psychological Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0033291700014379","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,5,27]],"date-time":"2019-05-27T16:05:02Z","timestamp":1558973102000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0033291700014379\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1978,5]]},"references-count":13,"journal-issue":{"issue":"2","published-print":{"date-parts":[[1978,5]]}},"alternative-id":["S0033291700014379"],"URL":"https:\/\/doi.org\/10.1017\/s0033291700014379","relation":{},"ISSN":["0033-2917","1469-8978"],"issn-type":[{"value":"0033-2917","type":"print"},{"value":"1469-8978","type":"electronic"}],"subject":[],"published":{"date-parts":[[1978,5]]}}}