Harvey Karen J, Espie Colin A
Department of Psychological Medicine, University of Glasgow, UK.
Br J Clin Psychol. 2004 Nov;43(Pt 4):409-20. doi: 10.1348/0144665042388900.
To develop a self-report measure (the Glasgow Content of Thoughts Inventory [GCTI]) for the assessment of pre-sleep cognitive activity in adults with sleep-onset insomnia.
A psychometric, scale development approach was used.
Over three consecutive nights, 12 people with insomnia provided 'live' audio-recordings of pre-sleep thought content, which were used to generate an item pool. The results were compared to the content and categorical structure of pre-sleep cognitive activity identified by Wicklow and Espie (2000), and commonalities in thought content were used to generate a draft scale. Following further piloting, a 25-item scale was developed and administered to two groups (29 people with insomnia and 29 good sleepers), along with other self-report measures, objective (actigraphic recordings) and subjective (diary) sleep indices, and results analysed to evaluate the psychometric properties of the scale.
The GCTI demonstrated evidence of construct validity, successfully discriminated between individuals with insomnia and good sleepers, and was significantly correlated with existing measures of sleep disturbance. A score of 42 yielded a sensitivity of 100% and specificity of 83%. The GCTI demonstrated good test- retest reliability (ICC = .88) and internal consistency (alpha = .87).
The GCTI appears to be a valid and reliable instrument for use with patients with sleep-onset insomnia.
开发一种自我报告测量工具（格拉斯哥思维内容量表[GCTI]），用于评估入睡性失眠成人的睡前认知活动。
采用心理测量学的量表开发方法。
连续三个晚上，12名失眠患者提供了睡前思维内容的“实时”录音，用于生成项目池。将结果与Wicklow和Espie（2000）确定的睡前认知活动的内容和分类结构进行比较，并利用思维内容的共性生成量表初稿。经过进一步试用，开发了一个包含25个条目的量表，并施测于两组人群（29名失眠患者和29名睡眠良好者），同时还采用了其他自我报告测量工具、客观（活动记录仪记录）和主观（日记）睡眠指标，并对结果进行分析以评估该量表的心理测量特性。
GCTI显示出结构效度的证据，成功区分了失眠患者和睡眠良好者，并且与现有的睡眠障碍测量工具显著相关。得分42时，敏感性为100%，特异性为83%。GCTI显示出良好的重测信度（ICC = 0.88）和内部一致性（α = 0.87）。
GCTI似乎是一种用于入睡性失眠患者的有效且可靠的工具。
