Intrusive thoughts and their relationship to actigraphic measurement of sleep: towards a cognitive model of insomnia.
Although cognitive over-arousal has been hypothesised as a causal factor in sleep-onset insomnia, relatively little is known about the specific pre-sleep intrusions which delay sleep. To investigate this relationship adequately 'live', verifiable, unobtrusive and independent monitoring of thought process and sleep pattern is essential. This study was designed with these requirements in mind. Voice-activated audiotape recordings of spontaneous thoughts, and actigraphic data from which to estim...Expand abstract
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