A driving-based Hazard Perception Test of anticipation (HPT) was applied alongside an interruption-based Situation Awareness (SA) probe to investigate the effects of interruption and reorienting the operator to the task. Content of the SA probe was manipulated in four conditions: No queries, SA queries, orienting queries, and irrelevant queries. The findings were firstly that the HPT scores correlated with the SA probe scores in the SA queries condition. Secondly, there was a negative effect of interruption on HPT scores. Finally, HPT scores increased during SA queries and orienting queries but not during irrelevant queries. The results imply that previous research showing no interruption effects from SA probe methods may be due to the orienting effects of the queries compensating for a decrease in scores caused by interruption.
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