Glasgow Content of Thoughts Inventory (GCTI) Test

People who notice persistent mental activity at bedtime can use the Glasgow Content of Thoughts Inventory (GCTI) Test to examine what occupies attention before sleep. It focuses on thoughts before sleep and helps a reader consider how often worry, planning, monitoring, or physical sensations occur while attention remains engaged. The result offers a focused starting point for reflecting on nighttime sleep patterns.

What This Assessment Explores

The questionnaire samples bedtime thought content and experiences rather than establishing what causes wakefulness. Items cover past and future events, daily experiences, responsibilities, feelings, bodily comfort, wakefulness, and beliefs about not sleeping. This format helps a reader notice whether bedtime cognitive activity is centered on worry, monitoring, or attempts to control sleep.

The main themes represented by the items are:

• Planning and reflection cover future tasks, past events, daily experiences, and mental imagery that are present in bedtime awareness.
• Emotional and bodily monitoring shows how tension, irritation, tiredness, alertness, heat, or cold enter bedtime awareness.
• Sleep and control monitoring captures attention to wakefulness, poor sleep, fear of staying awake, and attempts to stop thoughts.

Total Score: 25-100 reflects the level of pre-sleep concern about thoughts. Its bands are Low 25-42 and High 43-100. Higher scores indicate more frequent intrusive thoughts that interfere with falling asleep; 42 is the stated cutoff used for diagnosing insomnia.

Methodology and Scientific Basis

Each item asks how often a thought, feeling, sensation, or sleep concern occurs before sleep. Responses run from Never to Sometimes, Often, and Always, offering an ordered frequency choice rather than an open narrative. The result combines responses into one total, with higher values indicating more frequent intrusive pre-sleep concern and possible interference with falling asleep.

The questionnaire is conceptually consistent with the Glasgow Content of Thoughts Inventory (GCTI), but this does not establish the online form as a standardized adaptation. Wicklow and Espie connect intrusive thoughts with sleep disruption in a cognitive model of insomnia, while Marques and colleagues examine a European Portuguese adaptation. This English online version has no established norms or reliability estimates, so its evidence remains conceptual rather than a validated standardization.

For someone examining pre-sleep thought patterns, the result indicates the respondent’s current bedtime thinking. Stress, fatigue, recent events, and self-awareness can influence answers, and self-report may differ from observed sleep. The two-band display offers a practical signal, but it is not a standalone diagnosis of insomnia.