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Jurkat S, Köster M, Hernández Chacón L, Itakura S, Kärtner J. Visual attention across cultures: Similarities and differences in child development and maternal attention styles. Dev Sci 2024; 27:e13368. [PMID: 36650718 DOI: 10.1111/desc.13368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 11/14/2022] [Accepted: 12/17/2022] [Indexed: 01/19/2023]
Abstract
Previous cross-cultural research has described two different attention styles: a holistic style, characterized by context-sensitive processing, generally associated with interdependent cultural contexts, and an analytic style, a higher focus on salient objects, generally found in independent cultural contexts. Though a general assumption in the field is that attention styles are gradually socialized in culture-specific interactions in childhood, empirical evidence for the proximal mechanisms underlying this development is scarce. This study aimed to document the emergence of cross-cultural differences in attention styles in three cultural contexts differing in social orientations, namely in urban middle-class families from Münster, Germany (i.e., more independent context), and Kyoto, Japan, and Indigenous-heritage families from Cotacachi, Ecuador (i.e., more interdependent contexts). Furthermore, to test the assumption that caregivers' attention guidance is one of the forces driving differential development, we investigated how caregivers guide children's attention. In total, 270 children between 4 and 9 years of age and their mothers participated in three tasks: an eye-tracking task, a picture description task and a forced-choice recognition task. Results indicate a mixed pattern of findings: While some tasks revealed the expected cultural differences, namely a higher object focus in Münster compared to Kyoto and Cotacachi, others did not. Regarding caregivers' attention guidance, we found that mothers in Münster more strongly emphasized the focal object than mothers in Kyoto and Cotacachi. The results are discussed in terms of culture-specific developmental trajectories and the generalizability of attentional processes across tasks and cultural contexts. RESEARCH HIGHLIGHTS: We investigated visual attention styles in 4- to 9-year-old children and their mothers from urban Germany, urban Japan, and rural Ecuador in three different tasks. Special emphasis lied on mothers' verbal attention guidance toward their children as a proximal mechanism underlying the emergence of culture-specific attention styles. Mothers from urban Germany guided their children's attention in more analytic ways than mothers from urban Japan and rural Ecuador. The relevance of verbal attention guidance in the development of culture-specific attention styles has been demonstrated beyond the East-West dichotomy.
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Gao M, Starks MD, Golomb JD, Sloutsky VM. The development of visual cognition: The emergence of spatial congruency bias. Dev Sci 2024; 27:e13482. [PMID: 38332650 PMCID: PMC11161317 DOI: 10.1111/desc.13482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 10/11/2023] [Accepted: 01/18/2024] [Indexed: 02/10/2024]
Abstract
In adults, spatial location plays a special role in visual object processing. People are more likely to judge two sequentially presented objects as being identical when they appear in the same location compared to in different locations (a phenomenon referred to as Spatial Congruency Bias [SCB]). However, no comparable Identity Congruency Bias (ICB) is found, suggesting an asymmetric location-identity relationship in object binding. What gives rise to this asymmetric congruency bias? This paper considered two possible hypotheses. Hypothesis 1 suggests that the asymmetric congruency bias results from an inherently special role of location in the visual system. In contrast, Hypothesis 2 suggests that the asymmetric congruency bias is a product of development, reflecting people's experience with the world. To distinguish the two hypotheses, we tested both adults' and 5-year-old children's SCB and ICB by Identity Judgment Experiments and Spatial Judgment Experiments, respectively. The study found that adults only exhibited a SCB, but no ICB. However, young children exhibited both SCB and ICB, suggesting a symmetric congruency bias and reciprocal influences between location and identity in early development. The results indicate that the asymmetric location-identity relationship develops as object identity's influence on location gets pruned away, while location's influence on identity is preserved, possibly due to people's gained experiences with regularities of the world. RESEARCH HIGHLIGHTS: Adults exhibit Spatial Congruency Bias-an asymmetric location-identity relationship with location biasing their judgment of object identities, but not vice versa. Asymmetric congruency bias may result from an inherently special role of location in visual system (Hypothesis 1) or accumulated experiences with the world (Hypothesis 2). To distinguish the two hypotheses, the study investigated the Spatial Congruency Bias and Identity Congruency Bias in both adults and 5-year-old children. Unlike adults who exhibited only Spatial Congruency Bias, 5-year-old children exhibited both Spatial Congruency Bias and Identity Congruency Bias.
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Affiliation(s)
- Mengcun Gao
- Department of Psychology, The Ohio State University, Columbus, OH 43210, USA
| | - Maurryce D. Starks
- Department of Psychology, The Ohio State University, Columbus, OH 43210, USA
- Department of Psychology and Neuroscience, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Julie D. Golomb
- Department of Psychology, The Ohio State University, Columbus, OH 43210, USA
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Bánki A, Köster M, Cichy RM, Hoehl S. Communicative signals during joint attention promote neural processes of infants and caregivers. Dev Cogn Neurosci 2024; 65:101321. [PMID: 38061133 PMCID: PMC10754706 DOI: 10.1016/j.dcn.2023.101321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 10/13/2023] [Accepted: 11/04/2023] [Indexed: 01/01/2024] Open
Abstract
Communicative signals such as eye contact increase infants' brain activation to visual stimuli and promote joint attention. Our study assessed whether communicative signals during joint attention enhance infant-caregiver dyads' neural responses to objects, and their neural synchrony. To track mutual attention processes, we applied rhythmic visual stimulation (RVS), presenting images of objects to 12-month-old infants and their mothers (n = 37 dyads), while we recorded dyads' brain activity (i.e., steady-state visual evoked potentials, SSVEPs) with electroencephalography (EEG) hyperscanning. Within dyads, mothers either communicatively showed the images to their infant or watched the images without communicative engagement. Communicative cues increased infants' and mothers' SSVEPs at central-occipital-parietal, and central electrode sites, respectively. Infants showed significantly more gaze behaviour to images during communicative engagement. Dyadic neural synchrony (SSVEP amplitude envelope correlations, AECs) was not modulated by communicative cues. Taken together, maternal communicative cues in joint attention increase infants' neural responses to objects, and shape mothers' own attention processes. We show that communicative cues enhance cortical visual processing, thus play an essential role in social learning. Future studies need to elucidate the effect of communicative cues on neural synchrony during joint attention. Finally, our study introduces RVS to study infant-caregiver neural dynamics in social contexts.
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Affiliation(s)
- Anna Bánki
- University of Vienna, Faculty of Psychology, Vienna, Austria.
| | - Moritz Köster
- University of Regensburg, Institute for Psychology, Regensburg, Germany; Freie Universität Berlin, Faculty of Education and Psychology, Berlin, Germany
| | | | - Stefanie Hoehl
- University of Vienna, Faculty of Psychology, Vienna, Austria
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Köster M, Brzozowska A, Bánki A, Tünte M, Ward EK, Hoehl S. Rhythmic visual stimulation as a window into early brain development: A systematic review. Dev Cogn Neurosci 2023; 64:101315. [PMID: 37948945 PMCID: PMC10663747 DOI: 10.1016/j.dcn.2023.101315] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 06/22/2023] [Accepted: 10/12/2023] [Indexed: 11/12/2023] Open
Abstract
Rhythmic visual stimulation (RVS), the periodic presentation of visual stimuli to elicit a rhythmic brain response, is increasingly applied to reveal insights into early neurocognitive development. Our systematic review identified 69 studies applying RVS in 0- to 6-year-olds. RVS has long been used to study the development of the visual system and applications have more recently been expanded to uncover higher cognitive functions in the developing brain, including overt and covert attention, face and object perception, numeral cognition, and predictive processing. These insights are owed to the unique benefits of RVS, such as the targeted frequency and stimulus-specific neural responses, as well as a remarkable signal-to-noise ratio. Yet, neural mechanisms underlying the RVS response are still poorly understood. We discuss critical challenges and avenues for future research, and the unique potentials the method holds. With this review, we provide a resource for researchers interested in the breadth of developmental RVS research and hope to inspire the future use of this cutting-edge method in developmental cognitive neuroscience.
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Affiliation(s)
- Moritz Köster
- University of Regensburg, Institute of Psychology, Germany.
| | | | - Anna Bánki
- University of Vienna, Faculty of Psychology, Austria
| | - Markus Tünte
- University of Vienna, Faculty of Psychology, Austria
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Bánki A, Brzozowska A, Hoehl S, Köster M. Neural Entrainment vs. Stimulus-Tracking: A Conceptual Challenge for Rhythmic Perceptual Stimulation in Developmental Neuroscience. Front Psychol 2022; 13:878984. [PMID: 35602682 PMCID: PMC9121997 DOI: 10.3389/fpsyg.2022.878984] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 04/11/2022] [Indexed: 11/13/2022] Open
Affiliation(s)
- Anna Bánki
- Faculty of Psychology, University of Vienna, Vienna, Austria
- *Correspondence: Anna Bánki
| | | | - Stefanie Hoehl
- Faculty of Psychology, University of Vienna, Vienna, Austria
| | - Moritz Köster
- Institute of Psychology, University of Regensburg, Regensburg, Germany
- Faculty of Education and Psychology, Freie Universität Berlin, Berlin, Germany
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Schlegelmilch K, Wertz AE. Visual segmentation of complex naturalistic structures in an infant eye-tracking search task. PLoS One 2022; 17:e0266158. [PMID: 35363809 PMCID: PMC8975119 DOI: 10.1371/journal.pone.0266158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 03/15/2022] [Indexed: 11/24/2022] Open
Abstract
An infant’s everyday visual environment is composed of a complex array of entities, some of which are well integrated into their surroundings. Although infants are already sensitive to some categories in their first year of life, it is not clear which visual information supports their detection of meaningful elements within naturalistic scenes. Here we investigated the impact of image characteristics on 8-month-olds’ search performance using a gaze contingent eye-tracking search task. Infants had to detect a target patch on a background image. The stimuli consisted of images taken from three categories: vegetation, non-living natural elements (e.g., stones), and manmade artifacts, for which we also assessed target background differences in lower- and higher-level visual properties. Our results showed that larger target-background differences in the statistical properties scaling invariance and entropy, and also stimulus backgrounds including low pictorial depth, predicted better detection performance. Furthermore, category membership only affected search performance if supported by luminance contrast. Data from an adult comparison group also indicated that infants’ search performance relied more on lower-order visual properties than adults. Taken together, these results suggest that infants use a combination of property- and category-related information to parse complex visual stimuli.
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Affiliation(s)
- Karola Schlegelmilch
- Max Planck Research Group Naturalistic Social Cognition, Max Planck Institute for Human Development, Berlin, Germany
- * E-mail:
| | - Annie E. Wertz
- Max Planck Research Group Naturalistic Social Cognition, Max Planck Institute for Human Development, Berlin, Germany
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Jurkat S, Gruber M, Kärtner J. The effect of verbal priming of visual attention styles in 4- to 9-year-old children. Cognition 2021; 212:104681. [PMID: 33773423 DOI: 10.1016/j.cognition.2021.104681] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 03/09/2021] [Accepted: 03/15/2021] [Indexed: 11/25/2022]
Abstract
The way humans attend to their visual field differs profoundly between individuals. Previous research suggests that people tend to have either an analytic style, with a higher focus on the salient object of a scene, or a holistic style, characterized by higher attention to a scene's contextual information. Although a general assumption in many studies has been that these attention styles are socialized in social interaction during childhood, not much work has focused on the proximal mechanisms underlying this development. This study focuses on language as a potential cultural tool to habitualize ways of perceiving the world and investigates whether the visual attention of 4- to 9-year-old children can be experimentally manipulated via verbal primes that accentuate either analytic or holistic processing. Results indicate that verbal priming is effective in guiding children's gaze behavior in an eye-tracking task and their verbal accounts in a picture description task, but it only influences the way visual scenes are remembered in a forced-choice recognition task after own verbal productions. In concert with previous cross-cultural and correlational studies, these findings provide convergent evidence for the assumption that verbal attention guidance plays an important role in the socialization of attention styles.
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Affiliation(s)
- Solveig Jurkat
- Department of Psychology, University of Münster, Münster, Germany.
| | - Marius Gruber
- Department of Psychiatry, University of Münster, Münster, Germany
| | - Joscha Kärtner
- Department of Psychology, University of Münster, Münster, Germany
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Čeněk J, Tsai JL, Šašinka Č. Cultural variations in global and local attention and eye-movement patterns during the perception of complex visual scenes: Comparison of Czech and Taiwanese university students. PLoS One 2020; 15:e0242501. [PMID: 33196671 PMCID: PMC7668589 DOI: 10.1371/journal.pone.0242501] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 11/03/2020] [Indexed: 11/19/2022] Open
Abstract
Previous research on cross-cultural differences in visual attention has been inconclusive. Some studies have suggested the existence of systematic differences in global and local attention and context sensitivity, while others have produced negative or mixed results. The objective in this study was to examine the similarities and differences in holistic and analytic cognitive styles in a sample of Czech and Taiwanese university students. Two cognitive tasks were conducted: a Compound Figures Test and a free-viewing scene perception task which manipulated several focal objects and measured eye-movement patterns. An analysis of the reaction times in the Compound Figures Test showed no clear differences between either sample. An analysis of eye-movement metrics showed certain differences between the samples. While Czechs tended to focus relatively more on the focal objects measured by the number of fixations, the Taiwanese subjects spent more time fixating on the background. The results were consistent for scenes with one or two focal objects. The results of a correlation analysis of both tasks showed that they were unrelated. These results showed certain differences between the samples in visual perception but were not as systematic as the theory of holistic and analytic cognitive styles would suggest. An alternative model of cross-cultural differences in cognition and perception is discussed.
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Affiliation(s)
- Jiří Čeněk
- Department of Social Studies, Faculty of Regional Development and International Studies, Mendel University in Brno, Brno, Czech Republic
- * E-mail:
| | - Jie-Li Tsai
- Laboratory of Eye-Movements and Reading, Centre for the Mind, Brain and Learning, Department of Psychology, National Chengchi University, Taipei, Taiwan (R.O.C.)
| | - Čeněk Šašinka
- Division of Information and Library Studies, Faculty of Arts, Masaryk University, Brno, Czech Republic
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Jurkat S, Köster M, Yovsi R, Kärtner J. The Development of Context-Sensitive Attention Across Cultures: The Impact of Stimulus Familiarity. Front Psychol 2020; 11:1526. [PMID: 32760322 PMCID: PMC7372136 DOI: 10.3389/fpsyg.2020.01526] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 06/08/2020] [Indexed: 11/13/2022] Open
Abstract
Across cultures, there are marked differences in visual attention that gradually develop between 4 and 6 years of age. According to the social orientation hypothesis, people in interdependent cultures should show more pronounced context sensitivity than people in independent cultures. However, according to the differential familiarity hypothesis, the focus on the salient object should also depend on the familiarity of the stimulus; people will focus more on the focal object (i.e., less context sensitivity), if it is a less familiar stimulus. To examine the differences in visual attention between interdependent and independent cultures while taking into account stimulus familiarity, this study used an eye-tracking paradigm to assess visual attention of participants between 4 and 20 years who came from urban middle-class families from Germany (n = 53; independent culture) or from Nso families in a rural area in Cameroon (n = 50; interdependent culture). Each participant saw four sets of stimuli, which varied in terms of their familiarity: (1) standard stimuli, (2) non-semantic stimuli, both more familiar to participants from Germany, (3) culture-specific matched stimuli, and (4) simple stimuli, similarly familiar to the individuals of both cultures. Overall, the findings show that mean differences in visual attention between cultures were highly contingent on the stimuli sets: In support of the social orientation hypothesis, German participants showed a higher object focus for the culture-specific matched stimuli, while there were no cultural differences for the simple set. In support of the differential familiarity hypothesis, the Cameroonian participants showed a higher object focus for the less familiar sets, namely the standard and non-semantic sets. Furthermore, context sensitivity correlated across all the sets. In sum, these findings suggest that the familiarity of a stimulus strongly affects individuals’ visual attention, meaning that stimulus familiarity needs to be considered when investigating culture-specific differences in attentional styles.
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Affiliation(s)
- Solveig Jurkat
- Department of Psychology, University of Münster, Münster, Germany
| | - Moritz Köster
- Institute of Psychology, Free University Berlin, Berlin, Germany
| | | | - Joscha Kärtner
- Department of Psychology, University of Münster, Münster, Germany
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Mavridis P, Kärtner J, Cavalcante LIC, Resende B, Schuhmacher N, Köster M. The Development of Context-Sensitive Attention in Urban and Rural Brazil. Front Psychol 2020; 11:1623. [PMID: 32793045 PMCID: PMC7393234 DOI: 10.3389/fpsyg.2020.01623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Accepted: 06/16/2020] [Indexed: 12/03/2022] Open
Abstract
Human perception differs profoundly between individuals from different cultures. In the present study, we investigated the development of context-sensitive attention (the relative focus on context elements of a visual scene) in a large sample (N = 297) of 5- to 15-year-olds and young adults from rural and urban Brazil, namely from agricultural villages in the Amazon region and the city of São Paulo. We applied several visual tasks which assess context-sensitive attention, including an optical illusion, a picture description, a picture recognition and a facial emotion judgment task. The results revealed that children and adults from the urban sample had a higher level of context-sensitive attention, when compared to children and adults from the rural sample. In particular, participants from São Paulo were more easily deceived by the context elements in an optical illusion task and remembered more context elements in a recognition task than participants from rural Amazon villages. In these two tasks, context-sensitivity increased with age. However, we did not find a cultural difference in the picture description and the facial emotion judgment task. These findings support the idea that visual information processing is highly dependent on the culture-specific learning environments from very early in development. Specifically, they are more consistent with accounts that emphasize the role of the visual environment, than with the social orientation account. However, they also highlight that further research is needed to disentangle the diverse factors that may influence the early development of visual attention, which underlie culture-specific developmental pathways.
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Affiliation(s)
- Pablo Mavridis
- Department of Psychology, University of Münster, Münster, Germany
| | - Joscha Kärtner
- Department of Psychology, University of Münster, Münster, Germany
| | | | - Briseida Resende
- Department of Experimental Psychology, University of São Paulo, São Paulo, Brazil
| | - Nils Schuhmacher
- Department of Psychology, University of Münster, Münster, Germany
| | - Moritz Köster
- Department of Cross-Cultural Developmental Psychology, Free University Berlin, Berlin, Germany
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Köster M, Kärtner J. Context-sensitive attention is socialized via a verbal route in the parent-child interaction. PLoS One 2018; 13:e0207113. [PMID: 30408099 PMCID: PMC6224102 DOI: 10.1371/journal.pone.0207113] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2017] [Accepted: 10/19/2018] [Indexed: 11/18/2022] Open
Abstract
The way humans perceive and attend to visual scenes differs profoundly between individuals. This is most compellingly demonstrated for context-sensitivity, the relative attentional focus on focal objects and background elements of a scene, in cross-cultural comparisons. Differences in context-sensitivity have been reported in verbal accounts (e.g. picture descriptions) and in visual attention (e.g., eye-tracking paradigms). The present study investigates (1) if the way parents verbally guide the attention of their children in visual scenes is associated with differences in children’s context-sensitivity and (2) if verbal descriptions of scenes are related to early visual attention (i.e., gaze behavior) in 5-year-old children and their parents. Importantly, the way parents verbally described visual scenes to their children was related to children’s context-sensitivity, when describing these scenes themselves. This is, we found a correlation in the number of references made to the object versus the background as well as the number of relations made between different elements of a scene. Furthermore, verbal descriptions were closely related to visual attention in adults, but not in children. These findings support our hypotheses that context-sensitivity is socialized via a verbal route and that visual attention processes align with acquired narrative structures only later in development, after the preschool years.
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Affiliation(s)
- Moritz Köster
- Department of Psychology, University of Münster, Fliednerstraße 21, Münster, Germany
- Institute of Psychology, Free University Berlin, Habelschwerdter Allee 45, Berlin, Germany
- * E-mail:
| | - Joscha Kärtner
- Department of Psychology, University of Münster, Fliednerstraße 21, Münster, Germany
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Köster M, Itakura S, Yovsi R, Kärtner J. Visual attention in 5-year-olds from three different cultures. PLoS One 2018; 13:e0200239. [PMID: 30011296 PMCID: PMC6047771 DOI: 10.1371/journal.pone.0200239] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 06/24/2018] [Indexed: 11/19/2022] Open
Abstract
Cognitive processes differ markedly between children from different cultures, with best evidence for attention to visual scenes and the activities of others. Children from urban Western cultures tend to focus on focal objects, whereas children from urban East-Asian cultures rather attend to contextual elements of a visual scene. Regarding the attention to others' activities, children from subsistence-based farming communities often observe several activities simultaneously, while children from urban Western contexts focus on activities sequentially. Here we assessed 144 5-year-old children from three prototypical cultural contexts (urban Germany, rural Cameroon, urban Japan) to investigate variations in attention across a variety of tasks. Attention to the elements of a visual scene was assessed in an optical illusion task, in picture descriptions and an eye-tracking paradigm. Attention to and learning from others' activities was assessed in a parallel action task and a rule-based game. Some tasks indicated higher context-sensitive attention in urban Japan, while other findings indicated higher context-sensitive attention in urban Germany. Levels of parallel attention and learning from others' activities were lower in rural Cameroonian children compared to the urban samples. Across tasks, the visual attention measures were unrelated. These findings substantiate that culture has a profound influence on early cognitive development, already in the preschool years. Furthermore, they raise critical questions about the early origins of cultural specificities in attention and the generalizability of attention phenomena beyond specific tasks and populations.
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Affiliation(s)
- Moritz Köster
- Department of Psychology, University of Münster, Fliednerstraße 21, Münster, Germany
- Institute of Psychology, Free University Berlin, Habelschwerdter Allee 45, Berlin, Germany
| | - Shoji Itakura
- Department of Psychology, Graduate School of Letters, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto, Japan
| | | | - Joscha Kärtner
- Department of Psychology, University of Münster, Fliednerstraße 21, Münster, Germany
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