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The perceptual-attentional limitation hypothesis posits that the confusion between emotional facial expressions of fear and surprise may be due to their visual similarity, with shared muscle movements. In Experiment 1 full face images of fear and surprise varying as a function of distinctiveness (mouth index, brow index, or both indices) were displayed in a gender oddball task. Experiment 2, in a similar task, directed attention toward the eye or mouth region with a blurring technique. The current two studies used response time and event-related potentials (ERP) to test the perceptual-attentional limitation hypothesis. While ERP results for Experiment 1 suggested that individuals may not have perceived a difference between the emotional expressions in any of the conditions, response time results suggested that individuals processed a difference between fear and surprise when a distinctive cue was in the mouth. With directed attention in Experiment 2, ERP results indicated that individuals were capable of detecting a difference in all the conditions. In effect, the current two experiments suggest that participants display difficulty in distinguishing the prototypes of fear and surprise with the eye region, which may be due to a lack of attention to that region, providing support for the attentional limitation hypothesis.

The current study examined the effect of pointing to the words and using highlighted text by examining eye movements when children in preschool, Grade 1 and 2 were read storybooks of two levels of difficulty. For all children, pointing to and highlighting the text was observed to increase the amount of time and number of fixations on the printed text than when there was no intervention. Furthermore, with difficult text, an increased amount of time and number of fixations was observed when the text was pointed to than when it was highlighted. For preschoolers, even with the increased attention on the text from pointing to and highlighting the words, the fixations did not match the narration. First and second graders, with the difficult book, made more matching fixations both when the printed text was pointed to and highlighted than when no intervention was done. Additionally, more matching fixations were made when the printed text was highlighted than when pointed to. Future research is required to examine the effects of attention-orienting strategies on reading related outcomes.

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