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Fendel JC, Vogt A, Brandtner A, Schmidt S. Mindfulness programs for problematic usage of the internet: A systematic review and meta-analysis. J Behav Addict 2024. [PMID: 38703362 DOI: 10.1556/2006.2024.00024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 03/30/2024] [Accepted: 04/03/2024] [Indexed: 05/06/2024] Open
Abstract
Introduction Problematic usage of the internet (PUI) is an umbrella term for a range of uncontrolled, excessive, and potentially harmful online behaviors. Recently, numerous studies have examined the potential of mindfulness programs (MPs) for reducing PUI. We conducted a comprehensive systematic review and meta-analysis in this emerging field. Methods We searched eight databases from inception to October 18, 2022, with no language restrictions. We included randomized controlled trials (RCTs) and nonrandomized trials (NRTs). The primary outcome was change in self-reported PUI, the secondary outcome was change in screen time. Results Of 3,473 identified records, 19 RCTs and 20 NRTs with a total of 1,549 participants were included. Participation in an MPwas associated with large reductions in PUI in between-group analysis in RCTs (k = 19; g = -1.67; 95% CI -2.15, -1.19) and in within-group pre-post analysis in all studies (k = 35; g = -1.67; 95% CI -1.99, -1.36). Screen time showed a medium reduction in within-group pre-post analysis (k = 10; g = -0.65; 95% CI -0.90, -0.41). The effects for PUI remained significant in a series of sensitivity analyses, such as excluding low quality studies, excluding outliers, adjusting for publication bias, or using follow-up data. Heterogeneity between studies was high and the overall quality of evidence was rated low. Discussion and conclusions MPs are probably effective in reducing PUI and might be effective in reducing screen time. Shortcomings in the quality of evidence highlight the need for high-quality controlled trials with long-term follow-ups to confirm results.
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Affiliation(s)
- Johannes C Fendel
- 1Department of Psychosomatic Medicine and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Annika Vogt
- 1Department of Psychosomatic Medicine and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Annika Brandtner
- 2Department of General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), University of Duisburg-Essen, Duisburg, Germany
| | - Stefan Schmidt
- 1Department of Psychosomatic Medicine and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
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Liebherr M, Brandtner A, Brand M, Tang YY. Digital mindfulness training and cognitive functions: A preregistered systematic review of neuropsychological findings. Ann N Y Acad Sci 2024; 1532:37-49. [PMID: 38197226 DOI: 10.1111/nyas.15095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2024]
Abstract
Traditional mindfulness interventions have been frequently reported to be effective in improving cognitive functions. In recent years, however, traditional programs are being increasingly replaced by technology-enabled mindfulness training programs. The aim of the present systematic review (PROSPERO ID: CRD42021289480) is to evaluate the research evidence on their effects on cognitive functions. Empirical training studies in the realm of digital mindfulness training that fulfilled the inclusion criteria led to 19 studies and 1654 participants being included in this review from among the papers searched in PubMed, Scopus, and Web of Knowledge. Results support previous assumptions on the potential of digital mindfulness training, with the most robust effect on attention control, followed by executive regulation, memory, cognitive flexibility, and other cognitive functions. However, the number of studies that did not find significant changes at least equaled, if not exceeded, the number of studies that found increases. The heterogeneity of identified studies prompted us to discuss several aspects in order to help the future development of digital applications.
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Affiliation(s)
- Magnus Liebherr
- General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), University of Duisburg-Essen, Duisburg, Germany
- Erwin L. Hahn Institute for Magnetic Resonance Imaging, Essen, Germany
| | - Annika Brandtner
- General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), University of Duisburg-Essen, Duisburg, Germany
- Erwin L. Hahn Institute for Magnetic Resonance Imaging, Essen, Germany
| | - Matthias Brand
- General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), University of Duisburg-Essen, Duisburg, Germany
- Erwin L. Hahn Institute for Magnetic Resonance Imaging, Essen, Germany
| | - Yi-Yuan Tang
- College of Health Solutions, Arizona State University, Tempe, Arizona, USA
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Antons S, Liebherr M, Brand M, Brandtner A. From game engagement to craving responses - The role of gratification and compensation experiences during video-gaming in casual and at-risk gamers. Addict Behav Rep 2023; 18:100520. [PMID: 38149224 PMCID: PMC10749870 DOI: 10.1016/j.abrep.2023.100520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/25/2023] [Accepted: 11/28/2023] [Indexed: 12/28/2023] Open
Abstract
Introduction Although playing videogames is a common leisure activity some individuals develop problematic gaming behaviors or even symptoms of a gaming disorder. Game engagement may be involved in reinforcement learning that may result in experiences of craving, an important feature of gaming disorder. In the following study we aimed to approach the question which aspects contribute to increased craving for gaming. Methods Overall, 439 individuals participated in an online survey, answering questionnaires on game engagement, experience of gratification and compensation, craving, and symptoms of gaming disorder. A mediation model testing if the association between game engagement and facets of craving are mediated by the experience of gratification and compensation during gaming. Results Three facets of craving (reward/relief, physiological, obsessive craving) were statistically explained by game engagement and the experience of gratification and compensation. Models differed between casual gamers and at-risk gamers. The effects on reward/relief and physiological craving were fully mediated in the casual group and partially mediated in the at-risk group by gratification and compensation experiences. Conclusion Game engagement may contribute to the development of craving by increasing the experience of gratification and compensation and thus might be important in reinforcement learning. Games evoking a high engagement may therefore have a higher addictive potential. Further processes potentially related to game engagement, such as intrusive thoughts and desire thinking, which are related to craving experiences, should be considered in future studies.
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Affiliation(s)
- S. Antons
- General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), University of Duisburg, Duisburg, Germany
- Erwin L. Hahn Institute for Magnetic Resonance Imaging, Essen, Germany
| | - M. Liebherr
- General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), University of Duisburg, Duisburg, Germany
| | - M. Brand
- General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), University of Duisburg, Duisburg, Germany
- Erwin L. Hahn Institute for Magnetic Resonance Imaging, Essen, Germany
| | - A. Brandtner
- General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), University of Duisburg, Duisburg, Germany
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Brandtner A, Wegmann E. The fear in desire: linking desire thinking and fear of missing out in the social media context. BMC Psychol 2023; 11:176. [PMID: 37270492 DOI: 10.1186/s40359-023-01216-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Accepted: 05/18/2023] [Indexed: 06/05/2023] Open
Abstract
According to the Elaborated Intrusion Theory of Desire, desire thinking and an associated deficit are fundamental factors to the emergence of craving. In the special case of problematic social networking sites (SNS) use, this experienced deficit could be constituted of an online-specific fear of missing out (FoMO). To test the interaction of these cognitions and their influence on problematic SNS use, we tested a serial mediation model on a sample of N = 193 individuals who use SNS (73% female, Mage = 28.3, SD = 9.29). We found that desire thinking predicted FoMO and both variables were only significant predictors of problematic SNS use when considered in interplay with craving. Ad hoc analyses revealed that the verbal subcomponent of desire thinking is more strongly associated with FoMO than imaginal prefiguration. Our results highlight that neither desire thinking nor FoMO are inherently dysfunctional but become problematic when they increase craving for potentially problematic SNS use.
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Affiliation(s)
- Annika Brandtner
- Department of General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), University of Duisburg-Essen, Forsthausweg 2, LE220, 47057, Duisburg, Germany.
| | - Elisa Wegmann
- Department of General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), University of Duisburg-Essen, Forsthausweg 2, LE220, 47057, Duisburg, Germany
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Brandtner A, Verduyn P, Behrens S, Spada MM, Antons S. License to look? The role of permissive beliefs, desire thinking, and self-control in predicting the use of social networking sites. Addict Behav 2023; 139:107573. [PMID: 36608591 DOI: 10.1016/j.addbeh.2022.107573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 11/22/2022] [Accepted: 12/02/2022] [Indexed: 12/13/2022]
Abstract
Permissive beliefs are considered the most proximal predictor of actual behavior. Whereas they have frequently been researched in substance-use disorders, the field of social networking sites (SNS) use is missing the investigation as to how relevant permissive beliefs might be in this context, what might be causal precursors of permissive beliefs (i.e., desire thinking), and which processes might influence the effect that permissive beliefs have on actual behavior (i.e., self-control). To answer these questions, 116 people who use SNS participated in an online survey that contained an experimental manipulation of desire thinking and questionnaires measuring permissive beliefs, self-control, and severity of problematic SNS use. In a one-week follow-up, 85 participants reported their SNS usage times. Results showed that the association between permissive beliefs and tendencies to use SNS problematically was not significant. The experimental manipulation led to a decrease in permissive beliefs in the control condition, but did not increase permissive beliefs in the desire thinking condition. Permissive beliefs predicted SNS use in the follow-up assessment, which was not moderated by self-control. The results suggest that permissive beliefs seem to be unrelated to addictive tendencies of SNS use, but are nevertheless associated with daily use. Desire thinking does not appear to activate permissive beliefs in this study, possibly because the use of social networks is less often experienced as conflicting. Due to its ubiquitous availability, the use of social networks itself might quickly resolve the conflict between desires and possible regulatory attempts, making good reasons for use unnecessary.
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Affiliation(s)
- Annika Brandtner
- University of Duisburg-Essen, Department of General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), Duisburg, Germany.
| | - Philippe Verduyn
- Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands.
| | - Sofie Behrens
- University of Duisburg-Essen, Department of General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), Duisburg, Germany.
| | | | - Stephanie Antons
- University of Duisburg-Essen, Department of General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), Duisburg, Germany; Erwin L. Hahn Institute for Magnetic Resonance Imaging, Essen, Germany.
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Brandtner A, Antons S, King DL, Potenza MN, Tang YY, Blycker GR, Brand M, Liebherr M. A preregistered, systematic review considering mindfulness-based interventions and neurofeedback for targeting affective and cognitive processes in behavioral addictions. Clinical Psychology: Science and Practice 2022. [DOI: 10.1037/cps0000075] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Brandtner A, Antons S, Cornil A, Brand M. Integrating Desire Thinking into the I-PACE Model: a Special Focus on Internet-Use Disorders. Curr Addict Rep 2021. [DOI: 10.1007/s40429-021-00400-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Abstract
Purpose of Review
This manuscript aims to propose an integration of desire thinking into the Interaction of Person-Affect-Cognition-Execution (I-PACE) model based on theoretical considerations within the Elaborated Intrusion Theory of Desire and Self-Regulatory Execution Function model and empirical evidence from the field of internet-use disorders.
Recent Findings
Theory and research on desire thinking in the context of internet-use disorders suggest considerable relations to craving, metacognitive beliefs, and emphasizes its nature when initiated as a reaction towards unpleasant triggers. Accordingly, we postulate that desire thinking may be located at the position for affective and cognitive reactions towards triggers within the I-PACE model.
Summary
The suggested integration of desire thinking into the I-PACE model specifically implies the assumption of a relief-oriented and pleasure-oriented entry pathway into desire thinking and a feedback loop between desire thinking and the experience of gratification and compensation. The model pathways proposed here may serve as a theoretical basis for future research and need further empirical verification.
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Brandtner A, Brand M. Fleeing through the mind's eye: Desire thinking as a maladaptive coping mechanism among specific online activities. Addict Behav 2021; 120:106957. [PMID: 33932838 DOI: 10.1016/j.addbeh.2021.106957] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 04/13/2021] [Accepted: 04/13/2021] [Indexed: 02/04/2023]
Abstract
INTRODUCTION Desire thinking is defined as a voluntary cognitive activity aimed at imaginatively and verbally elaborating a future scenario of performing a desired behavior. Although not problematic per se, desire thinking can become dysfunctional if it is used to regulate negative mood states and due to its ability to induce craving. This study tests a mediation model where desire thinking is hypothesized to mediate the association between emotional reactivity and craving among specific online activities. METHODS The study comprised an online survey that was completed by 925 participants who indicated that their first-choice online activity was one out of social-networks use, shopping, gaming, gambling, or pornography viewing. In this sample, a structural equation model was tested where negative emotional reactivity, desire thinking, and craving were latently modelled in this serial order. RESULTS Results indicated that higher levels in negative emotional reactivity significantly predicted higher desire thinking tendencies, which in turn significantly predicted higher cravings for online activities. The direct path between negative reactivity and craving was not significant. Further, our results support the two-factorial structure of a German version of the Desire Thinking Questionnaire (Caselli & Spada, 2011). DISCUSSION The findings show that desire thinking might be initiated as an attempt to regulate negative affective states. This highlights its possible role as a maladaptive coping mechanism in the context of specific online activities due to the resulting craving responses, which in turn could promote the emergence of unwanted behaviors.
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Affiliation(s)
- Annika Brandtner
- University of Duisburg-Essen, Department of General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), Duisburg, Germany.
| | - Matthias Brand
- University of Duisburg-Essen, Department of General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), Duisburg, Germany; Erwin L. Hahn Institute for Magnetic Resonance Imaging, Essen, Germany.
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Wegmann E, Brandtner A, Brand M. Perceived Strain Due to COVID-19-Related Restrictions Mediates the Effect of Social Needs and Fear of Missing Out on the Risk of a Problematic Use of Social Networks. Front Psychiatry 2021; 12:623099. [PMID: 33967850 PMCID: PMC8102741 DOI: 10.3389/fpsyt.2021.623099] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 03/25/2021] [Indexed: 11/13/2022] Open
Abstract
The occurrence of the COVID-19-virus led to drastic short-term measures to reduce its spread and influence. Regulations such as "physical distancing," mentioned as "social distancing," and the closure of public facilities during the lockdown could be perceived as burdensome especially by individuals who feel a strong need for social exchange and belonging. These components such as need to belong and the fear of missing out also play a major role in the development and maintenance of a problematic use of social networks. Researchers have argued recently that an increase of addictive (online) behaviors may be a likely consequence of subjectively experienced restrictions in the context of the COVID-19 pandemic. The current study investigates the interplay of perceived strain due to COVID-19-related restrictions and the fear of missing out (FoMO) as well as of symptoms of problematic social-networks use. We hypothesized that perceived strain due to COVID-19-related restrictions mediates the effect of specific predisposing variables related to social needs on the symptom severity of a problematic use. To assess the perceived strain due to COVID-19-related restrictions, we developed a specific questionnaire asking for perceived COVID-19-related strain in several domains of everyday-life. An exploratory factor analysis identified five factors: perceived strain related to restrictions of (1) social contacts, (2) travel, (3) childcare, (4) work, and (5) own health. In a sample of 719 German participants and data collection during the first COVID-19 lockdown (March 30th until April 3rd 2020), a structural equation model was calculated showing that higher levels of need to belong and FoMO increase perceived COVID-19-related strain, which is related to symptoms of a problematic social-networks use. The effect of need to belong on problematic social-networks use is mediated by experienced COVID-19-related strain and FoMO-online. Even if the use of social networks is not pathological per se, it may be associated with suffering for a vulnerable part of users. We conclude that specific needs and fear-associated predisposing variables contribute to experiencing physical distance and other pandemic-related restrictions as more stressful, which may increase problematic social-networks use and potentially other addictive behaviors as well in the context of the COVID-19-related lockdown.
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Affiliation(s)
- Elisa Wegmann
- General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), University of Duisburg-Essen, Duisburg, Germany
| | - Annika Brandtner
- General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), University of Duisburg-Essen, Duisburg, Germany
| | - Matthias Brand
- General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), University of Duisburg-Essen, Duisburg, Germany
- Erwin L. Hahn Institute for Magnetic Resonance Imaging, Essen, Germany
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Brandtner A, Wegmann E, Brand M. Desire thinking promotes decisions to game: The mediating role between gaming urges and everyday decision-making in recreational gamers. Addict Behav Rep 2020; 12:100295. [PMID: 33364304 PMCID: PMC7752661 DOI: 10.1016/j.abrep.2020.100295] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 07/30/2020] [Accepted: 07/31/2020] [Indexed: 12/14/2022] Open
Abstract
INTRODUCTION Desire thinking is a voluntary cognitive process that involves the imaginal forecast of a desired activity and the verbal perseveration with plans and good reasons for engaging in it. Considering theoretical models arguing that specific decision-making processes may be involved in the development of gaming disorder, we hypothesized that an initial urge to game might be accelerated by desire thinking, leading to the decision to game in an everyday setting although the gaming behavior may conflict with another activity or certain other goals. METHODS A pre-study helped developing a catalogue of situations that provides forced-choice scenarios warranting a decision for or against gaming. To explore the postulated sequence of cognitive and affective events, a serial mediation model with urge to game as predictor, decision to game as dependent variable, and imaginal prefiguration and verbal perseveration as mediators was tested in a sample of 118 recreational gamers with varying degrees of gaming intensity. RESULTS The pre-study revealed a catalogue of 18 conflicting situations that likely happen in the daily life of gamers, containing conflicting activities such as job/educational performance and meeting friends/family/acquaintances. In the sequential mediation model, the desire thinking facets imaginal prefiguration and verbal perseveration fully mediated the relation between an initial urge and the decision to game. CONCLUSIONS The mediation model emphasizes the serial ordinance of desire thinking facets and their role in motivating decisions to game after an initial urge has been experienced. Results may indicate that desire thinking plays a considerable role in problematic gaming tendencies.
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Affiliation(s)
- Annika Brandtner
- University of Duisburg-Essen, Department of General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), Duisburg, Germany
| | - Elisa Wegmann
- University of Duisburg-Essen, Department of General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), Duisburg, Germany
| | - Matthias Brand
- University of Duisburg-Essen, Department of General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), Duisburg, Germany
- Erwin L. Hahn Institute for Magnetic Resonance Imaging, Essen, Germany
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Liebherr M, Schweig S, Brandtner A, Averbeck H, Maas N, Schramm D, Brand M. When virtuality becomes real: Relevance of mental abilities and age in simulator adaptation and dropouts. Ergonomics 2020; 63:1271-1280. [PMID: 32496964 DOI: 10.1080/00140139.2020.1778095] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Accepted: 05/26/2020] [Indexed: 06/11/2023]
Abstract
Previous studies increasingly report problems with simulator adaptation as well as dropouts. Therefore, the present study aims at better understanding these aspects by considering individual factors, such as age and mental abilities. 414 people were tested with commonly used neuropsychological measures as well as within a driving simulator which consists of a close-to-production vehicle of the compact class. In contrast to previous findings, neither a significant relationship between age and the time of adaptation nor an interaction between age and mental abilities on adaptation time could be identified. However, the time participants spent in the simulator (simulator dropout) significantly correlated with age but not with mental abilities. People who showed no adaptation spent significantly less time in the simulator, because of the occurrence of simulator sickness. Although attention was only mildly associated with the time of simulator adaptation, further research on this linkage is suggested. Practitioner summary: The study at hand clarifies the relevance of considering the process of simulator adaptation within simulator studies. However, the present findings suggest no relation between age and the time of adaptation but with simulator dropouts. Abbreviations: TMT: trail making test; LPS: leistungsprüfsystem; IOP: index of performance; ALFASY: altersgerechte fahrerassistenzsystem (Age-based Driver Assistance Systems).
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Affiliation(s)
- Magnus Liebherr
- Department of General Psychology: Cognition, University of Duisburg-Essen, Duisburg, Germany
| | - Stephan Schweig
- Department of Mechatronics, University of Duisburg-Essen, Duisburg, Germany
| | - Annika Brandtner
- Department of General Psychology: Cognition, University of Duisburg-Essen, Duisburg, Germany
| | - Heike Averbeck
- Department of General Psychology: Cognition, University of Duisburg-Essen, Duisburg, Germany
| | - Niko Maas
- Department of Mechatronics, University of Duisburg-Essen, Duisburg, Germany
| | - Dieter Schramm
- Department of Mechatronics, University of Duisburg-Essen, Duisburg, Germany
| | - Matthias Brand
- Department of General Psychology: Cognition, University of Duisburg-Essen, Duisburg, Germany
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