I-PerceptionPub Date : 2026-06-29eCollection Date: 2026-05-01DOI: 10.1177/20416695261459972
Katja Doerschner, Sylvia Pont
{"title":"To appear in a new light: Varying illumination colors induce dynamic transformations of perceptual qualities in still images.","authors":"Katja Doerschner, Sylvia Pont","doi":"10.1177/20416695261459972","DOIUrl":"10.1177/20416695261459972","url":null,"abstract":"<p><p>We demonstrate that dynamic illumination color variations can trigger surprising changes in perceptual qualities for printed imagery. We explored different types of printed stimuli, including existing illusions with color patterns, contrast phenomena, colored materials and objects, and art. Stimuli were presented under color-changing illumination, and naive observers were asked to report whether they saw any qualitative changes, and if so, of what type they were. Observers reported a wide variety of effects, ranging from glowing, deforming, wiggling, rotating, and flowing, to changes in depth or material. These results show how varying lighting color can modulate not only color appearance and contrast per se, but can also induce more general changes of object appearance in still images.</p>","PeriodicalId":47194,"journal":{"name":"I-Perception","volume":"17 3","pages":"20416695261459972"},"PeriodicalIF":1.1,"publicationDate":"2026-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13319982/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148370180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I-PerceptionPub Date : 2026-06-18eCollection Date: 2026-05-01DOI: 10.1177/20416695261458511
Takahiro Kawabe, Tao Morisaki, Yusuke Ujitoko
{"title":"Pseudo-slimy: A novel phenomenon to evoke stickiness perception.","authors":"Takahiro Kawabe, Tao Morisaki, Yusuke Ujitoko","doi":"10.1177/20416695261458511","DOIUrl":"10.1177/20416695261458511","url":null,"abstract":"<p><p>Everyday materials such as honey, shampoo, and oil are often described not only in terms of their viscosity but also by the sense of stickiness they evoke during contact and separation. Although previous studies have identified visual cues that support the perception of viscosity, the visual basis of stickiness perception, particularly in interactive contexts, remains poorly understood. Here, we introduce a novel phenomenon, termed <i>pseudo-slimy,</i> in which participants experience a sense of stickiness toward a visually deforming object that stretches and eventually breaks in response to their own finger movements. In Experiments 1 and 2, we systematically manipulated the distance at which the object visually broke (break distance) and found that larger break distances elicited significantly stronger impressions of stickiness. In Experiment 3, we demonstrated that the perceived strength of this phenomenon could be quantitatively mapped onto a psychological stickiness scale derived from common viscoelastic materials, showing a significant correlation between adjusted break distances and scale values. Together, these results suggest that the spatial extent of visually induced resistance to separation serves as a powerful cue for stickiness perception. The present findings provide new insights into how humans visually infer material stickiness in interactive situations and offer a potential framework for pseudo-haptic applications that evoke tactile qualities through visual feedback alone.</p>","PeriodicalId":47194,"journal":{"name":"I-Perception","volume":"17 3","pages":"20416695261458511"},"PeriodicalIF":1.1,"publicationDate":"2026-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13287407/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148319866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I-PerceptionPub Date : 2026-06-11eCollection Date: 2026-05-01DOI: 10.1177/20416695261456100
Richard F Murray
{"title":"Light and shape in the work of Robert Fones.","authors":"Richard F Murray","doi":"10.1177/20416695261456100","DOIUrl":"10.1177/20416695261456100","url":null,"abstract":"<p><p>I describe some interesting visual phenomena in the work of the artist Robert Fones, including combinatorial use of simple forms to generate three-dimensional shapes, a preference for lighting from overhead and to the left, the convex-concave ambiguity, and subtle but effective cues to lighting direction.</p>","PeriodicalId":47194,"journal":{"name":"I-Perception","volume":"17 3","pages":"20416695261456100"},"PeriodicalIF":1.1,"publicationDate":"2026-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13260956/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148253888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I-PerceptionPub Date : 2026-06-11eCollection Date: 2026-05-01DOI: 10.1177/20416695261452128
Lina Eicke-Kanani, Fabian Tatai, Lukas Rosenberger, Christina Schmitter, Benjamin Straube, Thomas S A Wallis
{"title":"Predictive visual uncertainty around moving trajectories influences causality judgments in launching displays.","authors":"Lina Eicke-Kanani, Fabian Tatai, Lukas Rosenberger, Christina Schmitter, Benjamin Straube, Thomas S A Wallis","doi":"10.1177/20416695261452128","DOIUrl":"10.1177/20416695261452128","url":null,"abstract":"<p><p>Michotte's 'launching displays' are animations of collision-like interactions between two objects that elicit a stable and robust impression that one object, the launcher, caused another object, the target, to move. Although it is well-known that unexpected disruptions of movement continuation between launcher and target decrease causal impressions in centre-to-centre collisions, the role of observers' visual uncertainty around predicted moving trajectories remains relatively unexplored. In this work, we (1) assess observers' uncertainty around post-collision moving angles in a trajectory prediction task and (2) collect their causal impression in a causality rating task. In the latter task, observers viewed centre-to-centre collisions with different levels of movement continuity between the launcher and the target disc. By presenting different launch orientations, we exploited the well-known oblique effect to vary trajectory prediction uncertainty within individuals. If observers rely on their trajectory predictions to rate the causality of the collision, we expect their accuracy in (1) to have a systematic influence on their causality rating in (2). We replicate previous findings that observers report stronger causal impressions in trials where the target and the launcher move in the same direction and weaker causal impressions for collisions where the target and the launcher moving trajectory deviated. Furthermore, causality ratings were on average higher for oblique compared to cardinal launch directions, implying that increased sensory uncertainty induces a stronger causal impression. We hope this work will inspire deeper empirical assessments and computational models describing the role of sensory uncertainty and predictive processes in shaping subjective impressions of causality.</p>","PeriodicalId":47194,"journal":{"name":"I-Perception","volume":"17 3","pages":"20416695261452128"},"PeriodicalIF":1.1,"publicationDate":"2026-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13260954/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148253845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I-PerceptionPub Date : 2026-05-20eCollection Date: 2026-05-01DOI: 10.1177/20416695261443209
Giovanni Anobile, Silvia Martelli, Eleonora Bieber, Francesca Tinelli, Sofia Ditano
{"title":"Sensorimotor numerosity uniquely supports arithmetic development in children.","authors":"Giovanni Anobile, Silvia Martelli, Eleonora Bieber, Francesca Tinelli, Sofia Ditano","doi":"10.1177/20416695261443209","DOIUrl":"10.1177/20416695261443209","url":null,"abstract":"<p><p>Symbolic numerical thinking is a signature human cognition, yet its foundations remain unclear. The prevailing perspective holds that numerical abilities build on a non-symbolic visual number sense that extracts numerosity from the environment. However, recent evidence suggests a sensorimotor number system also tracks the numerosity of internally self-generated actions. Whether this system supports the development of mathematical skills is unknown. In a series of psychophysical tasks, we measured precision (Weber fraction) for estimating, without counting, the number of (i) self-generated hand actions, (ii) visual-temporal flashes, and (iii) dot ensembles. Precision in the action-based numerosity estimation task explained about 30% of the variance in mental calculation ability - three and 15 times higher than spatial and temporal visual numerosity, respectively. This link remained strong even after regressing out the variance explained by natural development (age), verbal and non-verbal reasoning, non-numerical motor abilities, and visual numerosity estimation precision (R<sup>2</sup> ≈ 26%). These findings provide the first evidence for a specific link between the sensorimotor number system and mathematical competence, suggesting a foundational role of sensorimotor numerical processes in the development of symbolic human numerical cognition.</p>","PeriodicalId":47194,"journal":{"name":"I-Perception","volume":"17 3","pages":"20416695261443209"},"PeriodicalIF":1.1,"publicationDate":"2026-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13191139/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148018090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I-PerceptionPub Date : 2026-05-12eCollection Date: 2026-05-01DOI: 10.1177/20416695261448396
Nicholas J Wade
{"title":"In praise of anaglyphs.","authors":"Nicholas J Wade","doi":"10.1177/20416695261448396","DOIUrl":"10.1177/20416695261448396","url":null,"abstract":"<p><p>Anaglyphs are displays in which the left and right eye images are presented in different colours, such as red and cyan, and they are viewed through filters of the same colours so that each eye sees a different image. They have typically been used to present slightly different images to each eye so that they are seen in relief - stereoscopic depth. Anaglyphs have become increasingly popular as a means for printing and projecting stereoscopic drawings and photographs. The general standard now is for red/left eye, cyan/right eye filters for viewing similarly coloured printed or projected images and these are recommended for viewing the anaglyphs in this article. Despite the disdain for anaglyphs in visual science, they have been used extensively in visual art and education. However, anaglyphs can be constructed that yield displays that would be difficult to produce for refracting or reflecting stereoscopes.</p>","PeriodicalId":47194,"journal":{"name":"I-Perception","volume":"17 3","pages":"20416695261448396"},"PeriodicalIF":1.1,"publicationDate":"2026-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13172697/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147965112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I-PerceptionPub Date : 2026-05-10eCollection Date: 2026-05-01DOI: 10.1177/20416695261423067
David Burr
{"title":"Is number a primary perceptual attribute?","authors":"David Burr","doi":"10.1177/20416695261423067","DOIUrl":"10.1177/20416695261423067","url":null,"abstract":"<p><p>In this article, I briefly review evidence accumulated over the past two decades that number should be considered a primary perceptual attribute. I concentrate primarily on adaptation studies, but also show how these have been reinforced with other psychophysical methods, as well as pupillometry, EEG and imaging studies. There have been at least two major challenges to number being a primary perceptual attribute, and to adaptation itself, which I discuss. I conclude speculating on the functional role of adaptation to numerosity perception, and suggesting areas requiring further research.</p>","PeriodicalId":47194,"journal":{"name":"I-Perception","volume":"17 3","pages":"20416695261423067"},"PeriodicalIF":1.1,"publicationDate":"2026-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13167367/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147942850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I-PerceptionPub Date : 2026-04-27eCollection Date: 2026-03-01DOI: 10.1177/20416695261437638
Yang Gao, Charles Spence
{"title":"Assessing the role(s) of human touch in immersive entertainment.","authors":"Yang Gao, Charles Spence","doi":"10.1177/20416695261437638","DOIUrl":"10.1177/20416695261437638","url":null,"abstract":"<p><p>Physical touch plays an important role in various forms of immersive entertainment, influencing emotional engagement, presence, and narrative immersion. In this narrative historical review, we explore the significance of direct interpersonal (social) touch in entertainment contexts. This includes theme parks, immersive theater, participatory performance art, and digitally mediated touch (e.g., haptic feedback in virtual reality [VR], gaming, and film). By analyzing examples such as Disneyland character interactions, Sleep No More, and audience participation in The Rocky Horror Picture Show, we examine how physical touch enhances immersion by helping to break the fourth wall and by fostering audience agency. Additionally, we compare direct human touch with digitally mediated touch (e.g., haptic feedback in VR) and discuss their respective advantages and limitations. While digital touch offers flexibility and scalability, it often lacks the warmth (both literally and metaphorically), texture, and emotional nuance of actual human interaction and can struggle to reproduce the social meaning and attribution that shape affective touch. The review also highlights a number of the key challenges and boundary conditions in implementing physical touch in the context of entertainment, such as cultural variations in norms and comfort around interpersonal touch, privacy/consent concerns, hygiene concerns, and technical constraints. Future research directions include the integration of physical touch with emerging technologies, personalization of touch-based experiences, and the role of multisensory interactions in enhancing immersive storytelling. Understanding the mechanisms and impact of physical touch in entertainment can inform the design of future multisensory experiences, increasing audience engagement and emotional connectivity while minimizing harm and exclusion.</p>","PeriodicalId":47194,"journal":{"name":"I-Perception","volume":"17 2","pages":"20416695261437638"},"PeriodicalIF":1.1,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13133472/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147822068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I-PerceptionPub Date : 2026-04-24eCollection Date: 2026-03-01DOI: 10.1177/20416695261444892
Kazuyoshi Chikamura, Wakaba Yoshida, Shuma Tsurumi, Jun Kawahara
{"title":"Rightward shift of self-face representation.","authors":"Kazuyoshi Chikamura, Wakaba Yoshida, Shuma Tsurumi, Jun Kawahara","doi":"10.1177/20416695261444892","DOIUrl":"10.1177/20416695261444892","url":null,"abstract":"<p><p>Self-face representation refers to an internal image of one's own face that does not necessarily match its physical properties. A previous study showed that remembered facial features located centrally or on the right side, such as the nose and right eye, tend to shift rightward. However, this rightward bias may result from using the right index finger to report locations. The present study examined whether the bias would occur when participants used the left index finger, following Mora et al.'s procedure in which participants, with their eyes closed, pointed to locations on a transparent acrylic board as if the designated facial features were projected in parallel in front of the board. Twenty-eight participants pointed to designated facial features using either their right or left index finger. The reported locations were recorded digitally and compared with the actual feature locations. When using the right finger, a rightward bias appeared for all central and right-side facial features. When using the left finger, all left-side facial features shifted leftward, indicating a leftward bias. Importantly, the rightward bias remained for all right-side facial features. These results suggest that the bias reflects both a general tendency toward rightward shifting and an artifact related to the side of the reporting finger.</p>","PeriodicalId":47194,"journal":{"name":"I-Perception","volume":"17 2","pages":"20416695261444892"},"PeriodicalIF":1.1,"publicationDate":"2026-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13125781/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147822098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I-PerceptionPub Date : 2026-04-16eCollection Date: 2026-03-01DOI: 10.1177/20416695261441454
Tzu-Yu Chen, Li-Hsun Peng
{"title":"The influence of striped clothing on visual body perception: A study on pattern spacing design.","authors":"Tzu-Yu Chen, Li-Hsun Peng","doi":"10.1177/20416695261441454","DOIUrl":"10.1177/20416695261441454","url":null,"abstract":"<p><p>The slimming effect of striped clothing has long been a research topic in the field of visual perception. Some studies have supported the Helmholtz illusion, which suggests that clothing with horizontal lines makes a person appear thinner than clothing with vertical lines. However, other studies argued that these experiments lacked ecological validity, as it seemed unlikely that stimuli with vertical and horizontal stripes were present concurrently. Therefore, perceptual anchoring should be incorporated into the experimental procedure. While previous studies used only pencil stripes as the research object, this study employed both pencil and equidistant stripes, introducing five different stripe spacing types. This study conducted three comparisons regarding the perception of body image in striped clothing using a survey (n = 214): Experiment 1 identified the horizontal style that appears the slimmest; Experiment 2 identified the vertical style that appears the slimmest; Experiment 3 compared the effects of horizontal and vertical stripes across five garment styles on body image perception, including which style makes the body look slimmer, enhances the figure more effectively, and is more visually appealing. The results show that the horizontally pencil-striped dress (1 × 2 h in our nomenclature) is perceived as the slimmest. Second, while a pencil stripe pattern may make the body appear slimmer when oriented horizontally, an equidistant stripe pattern may do this when oriented vertically instead (1 × 1 v from back). Third, there are slight differences between the perceptions of males and females.</p>","PeriodicalId":47194,"journal":{"name":"I-Perception","volume":"17 2","pages":"20416695261441454"},"PeriodicalIF":1.1,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13091968/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147730020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}