Wo rry is a common experience, thought to be maintained by the tendency of interpreting ambiguous information in a consistent (e.g. negative) manner, termed "interpretation bias". This study explored whether high worriers (Penn State Worry Questionnaire score, PSWQ ≧ 56) and low worriers (PSWQ score ≦ 39) show different interpretation biases, and examined at which stages of information processing these interpretation biases occur. Participants with high and low worry levels completed interpretation assessment tasks yielding behavioural and event-related potential indices. We focused on the N400 component, reflecting whether given interpretations were in line with or violated participants' own interpretations. We found that high worriers lack the benign interpretation bias found in low worriers from the early "online" interpretative stage, reflected by the reaction time in a relatedness judgment task and the N400 in a lexical decision task, to the later "offline" stage at which participants had time for reflection. Our results suggest that a benign interpretation bias may be a protective factor in relation to worry and is likely to remain active across online and offline stages of interpretation processing.

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Background The COVID-19 pandemic has resulted in many individuals experiencing increased symptoms of anxiety. We predict that this increase may be underpinned by pandemic-related worry (PRW), characterised by repetitive negative thinking about pandemic-specific outcomes; and that this relationship is mediated through reduced attentional capacity required to regulate negative affect. Methods We developed a novel scale to measure the contents of PRW in an initial sample of 255 participants, and explored its relationship with cognitive functioning and negative affect in a sample of 382 UK-based university students, whilst controlling for recalled pre-pandemic trait anxiety. Results A five-factor model of PRW was identified, with factors reflecting worry about decline in quality of life (QoL) and probability of infection correlating with attention and memory-related errors. Importantly, attention-related errors partially mediated the positive relationship between PRW and negative affect, even when controlling for pre-pandemic trait anxiety. Conclusion PRW’s relationship with negative affect was partially mediated through attentional function, consistent with models of anxiety and attentional control. In UK-based students PRW may be predominantly focused on the decline in QoL; therefore, interventions targeting worry about the decline in QoL caused by COVID-19 are especially important in this population in the wake of the pandemic.

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