Introduction: The cognitive model of insomnia elucidated the importance of monitoring for sleep-related threat in fueling insomnia. The AYE Model proposed that there is a shift of attention from stress-related threats toward sleep-related stimulus in the transition from acute to chronic insomnia. This study was aimed to test this hypothesis by comparing the attention bias among good sleepers with different levels of stress reactivity, individuals with transient insomnia, and patients with chronic insomnia.