Shallow semantic processing of text: Evidence from eye movements

Evidence for shallow semantic processing has depended on paradigms that required readers to explicitly report whether they noticed an anomalous noun phrase (NP) after reading text such as 'Amanda was bouncing all over because she had taken too many tranquillizing sedatives in one day'. We replicated previous research by showing that readers frequently fail to report the anomaly, and that less-skilled readers have particular difficulty reporting locally anomalous NPs such as tranquillizing stimulants. In addition, we examined the time course of anomaly detection by monitoring readers' eye movements for spontaneous disruptions when encountering the anomalous NPs. The eye fixation data provided evidence for on-line detection of anomalies; however, the detection was delayed. Readers who later reported the anomaly did not spend longer processing the anomalous NP when first encountering it; however, they did spend longer refixating it. Our results challenge orthodox models of comprehension that assume that semantic analysis is exhaustive and complete.