RESUMO
The effects of social (eye gaze, pointing gestures) and symbolic (arrows) cues on observers' attention are often studied by presenting such cues in isolation and at fixation. Here, we extend this work by embedding cues in natural scenes. Participants were presented with a single cue (Experiment 1) or a combination of cues (Experiment 2) embedded in natural scenes and were asked to 'simply look at the images' while their eye movements were recorded to assess the effects of the cues on (overt) attention. Single-gaze and pointing cues were fixated for longer than arrows but at the cost of shorter dwell times on the cued object. When presented together, gaze and pointing cues were fixated faster and for longer than simultaneously presented arrows. Attention to the cued object depended on the combination of cues and whether both cues were directed towards or away from the target object. Together, the findings confirm earlier observations that people attract attention more strongly than arrows but that arrows more strongly direct attention.
RESUMO
In everyday conversation, we often use indirect replies to save face of our interlocutor (e.g., "Your paper does have room for improvement"). Six experiments were conducted to examine the role of verbal and nonverbal behaviors in the production and comprehension of indirect replies. In Experiments 1a and 1b, participants engaged in question-answer exchanges designed to elicit four types of replies (i.e., direct, indirect, lie, and neutral). Results showed that uncertainty terms, discourse markers and head tilt were most uniquely associated with the production of indirect replies. In Experiments 2a, 2b, 3a and 3b, participants categorized the types of replies in video clips of real participants in Experiments 1a and 1b. Results showed that nonverbal behaviors enhanced the performance and boosted the confidence in the identification of indirect replies. Furthermore, uncertainty terms, discourse markers and head tilt were also the most reliable cues for identifying indirect replies. Finally, the extent to which people relied on verbal and nonverbal cues to identify an indirect reply was context dependent. The more informative the verbal/nonverbal information was, the fewer nonverbal/verbal cues that contributed to the identification of indirect replies. Our results demonstrated that people integrate verbal and nonverbal information to enhance their understanding of the intended meaning in indirect replies. Findings from the current research provide an initial step toward developing a comprehensive and unified model of the production and comprehension of indirect replies, which takes both verbal and nonverbal behaviors into account. (PsycInfo Database Record (c) 2023 APA, all rights reserved).
Assuntos
Comunicação , Percepção da Fala , Humanos , Compreensão , Processos Mentais , Incerteza , Comunicação não VerbalRESUMO
The study of lithic technology can provide information on human cultural evolution. This article aims to analyse visual behaviour associated with the exploration of ancient stone artefacts and how this relates to perceptual mechanisms in humans. In Experiment 1, we used eye tracking to record patterns of eye fixations while participants viewed images of stone tools, including examples of worked pebbles and handaxes. The results showed that the focus of gaze was directed more towards the upper regions of worked pebbles and on the basal areas for handaxes. Knapped surfaces also attracted more fixation than natural cortex for both tool types. Fixation distribution was different to that predicted by models that calculate visual salience. Experiment 2 was an online study using a mouse-click attention tracking technique and included images of unworked pebbles and 'mixed' images combining the handaxe's outline with the pebble's unworked texture. The pattern of clicks corresponded to that revealed using eye tracking and there were differences between tools and other images. Overall, the findings suggest that visual exploration is directed towards functional aspects of tools. Studies of visual attention and exploration can supply useful information to inform understanding of human cognitive evolution and tool use.
Assuntos
Arqueologia , Tecnologia de Rastreamento Ocular , Cognição , Fixação Ocular , Humanos , TecnologiaRESUMO
Stair walking is a hazardous activity and a common cause of fatal and non-fatal falls. Previous studies have assessed the role of eye movements in stair walking by asking people to repeatedly go up and down stairs in quiet and controlled conditions, while the role of peripheral vision was examined by giving participants specific fixation instructions or working memory tasks. We here extend this research to stair walking in a natural environment with other people present on the stairs and a now common secondary task: using one's mobile phone. Results show that using the mobile phone strongly draws one's attention away from the stairs, but that the distribution of gaze locations away from the phone is little influenced by using one's phone. Phone use also increased the time needed to walk the stairs, but handrail use remained low. These results indicate that limited foveal vision suffices for adequate stair walking in normal environments, but that mobile phone use has a strong influence on attention, which may pose problems when unexpected obstacles are encountered.
