The challenge–skill balance and antecedents of flow: A meta-analytic investigation

A framework for neurophysiological experiments on flow states

Csikszentmihalyi's concept of the "flow state" was initially discovered in experts deeply engaged in self-rewarding activities. However, recent neurophysiology research often measures flow in constrained and unfamiliar activities. In this perspective article, we address the challenging yet necessary considerations for studying flow state's neurophysiology. We aggregate an activity-autonomy framework with several testable hypotheses to induce flow, expanding the traditional "challenge skill balance" paradigm. Further, we review and synthesise the best methodological practices from neurophysiological flow studies into a practical 24-item checklist. This checklist offers detailed guidelines for ensuring consistent reporting, personalising and testing isolated challenge types, factoring in participant skills, motivation, and individual differences, and processing self-report data. We argue for a cohesive approach in neurophysiological studies to capture a consistent representation of flow states.

Reducing discrepancies between actual and ideal affect across adulthood: the roles of activity flow conduciveness, pleasantness, and familiarity

Previous findings demonstrate that people often do not feel how they want to feel, supporting the distinction between "actual affect" and "ideal affect." But are there certain activities that reduce the discrepancy between actual and ideal affect? Based on flow theory and socioemotional selectivity theory, we examined whether the discrepancy between people's actual and ideal positive affect would be smaller during activities that were more conducive to flow (a state of intense absorption and concentration), pleasant, and familiar. In Study 1, U.S. participants aged 17-79 (N = 393) reported their ideal affect and how they felt during activities with varying degrees of challenges and skills. For both low-arousal positive affect (LAP) and high-arousal positive affect (HAP), participants reported smaller actual-ideal affect discrepancies during flow-conducive activities (when skills matched challenges). Study 2 was a 14-day experience sampling study, in which Hong Kong participants aged 18-83 (Nindividual = 109) reported their momentary actual and ideal affect, and how pleasant and familiar their activities were (Nexperience = 3,815). Greater activity familiarity was associated with smaller discrepancies in actual-ideal LAP, while greater activity pleasantness was associated with smaller discrepancies in actual-ideal HAP. These findings provide insights on the activities that help people achieve their ideal affect more easily.

Forgetting ourselves in flow: an active inference account of flow states and how we experience ourselves within them

Flow has been described as a state of optimal performance, experienced universally across a broad range of domains: from art to athletics, gaming to writing. However, its phenomenal characteristics can, at first glance, be puzzling. Firstly, individuals in flow supposedly report a loss of self-awareness, even though they perform in a manner which seems to evince their agency and skill. Secondly, flow states are felt to be effortless, despite the prerequisite complexity of the tasks that engender them. In this paper, we unpick these features of flow, as well as others, through the active inference framework, which posits that action and perception are forms of active Bayesian inference directed at sustained self-organisation; i.e., the minimisation of variational free energy. We propose that the phenomenology of flow is rooted in the deployment of high precision weight over (i) the expected sensory consequences of action and (ii) beliefs about how action will sequentially unfold. This computational mechanism thus draws the embodied cognitive system to minimise the ensuing (i.e., expected) free energy through the exploitation of the pragmatic affordances at hand. Furthermore, given the challenging dynamics the flow-inducing situation presents, attention must be wholly focussed on the unfolding task whilst counterfactual planning is restricted, leading to the attested loss of the sense of self-as-object. This involves the inhibition of both the sense of self as a temporally extended object and higher-order, meta-cognitive forms of self-conceptualisation. Nevertheless, we stress that self-awareness is not entirely lost in flow. Rather, it is pre-reflective and bodily. Our approach to bodily-action-centred phenomenology can be applied to similar facets of seemingly agentive experience beyond canonical flow states, providing insights into the mechanisms of so-called selfless experiences, embodied expertise and wellbeing.

Experiences of people living with Parkinson's disease and key stakeholders in dance-based programs: a systematic review and meta-ethnography

PURPOSE

To identify and synthesize qualitative literature on the experiences of participants and key stakeholders in dance programs for people living with Parkinson's disease. Synthesizing the available literature can generate new insights into participant experience to inform current and future programs.

MATERIALS AND METHODS

Qualitative and mixed methods studies were identified via a systematic search of six databases: CINAHL, Web of Science, Scopus, SPORTDiscus, PsycInfo, and MEDLINE. Articles were synthesized using the meta-ethnographic method developed by Noblit and Hare (1988). Key concepts across studies were related via reciprocal translation, ultimately forming a line-of-argument synthesis.

RESULTS

26 articles met the inclusion criteria. Four interrelated, overarching themes were developed: (1) dance communities provide peer support and insight into living with Parkinson's, (2) feeling safe, accepted, and included in the dance experience, (3) overcoming dance-based challenges contributes to sense of achievement, confidence, and connectedness, and (4) dance participation is an opportunity to re-imagine oneself.

CONCLUSION

Participant experience is shaped by the instructor-participant relationship, the social environment of classes, and class difficulty level. In order to support participant experience, classes should be safe, supportive, and have an appropriate challenge-skill balance. These qualities facilitate creative immersion and the potential for personal and collective change.

Nursing students' learning flow, self-efficacy and satisfaction in virtual clinical simulation and clinical case seminar

BACKGROUND

Virtual clinical simulations and clinical case seminar become widely utilized to address these constraints and help nursing students acquire clinical competencies as the limitations on practicum opportunities have been intensified by the COVID-19 pandemic. The purpose of this study was to examine learning flow, self-efficacy and satisfaction in virtual clinical simulation and clinical case seminar among nursing students.

METHODS

A descriptive cross-sectional study was used. Forty-two junior nursing students completed survey questionnaires after participating in computer-based virtual clinical simulation and clinical case seminar, which aimed at acquiring knowledge and care skills in geriatric nursing.

RESULTS

Significant differences in two methods were found in learning flow which included challenge-skill balance (t = -2.24, p < .05) and action-awareness merge (t = -3.32, p < .01). There was no significant difference in learning self-efficacy (t=-1.52, p = .137) and learning satisfaction (t=-0.92, p = .365).

CONCLUSIONS

When there's a mismatch between the perceived challenge and the students' skill levels, it can hinder the learning process. Therefore, instructors should evaluate the clinical skill levels of their students and make necessary adjustments to the difficulty levels of simulation and clinical case seminar accordingly.

The Cognitive Control Model of Work-related Flow

Although several models of flow have been proposed that include environmental and trait-based antecedents of the state, elements of cognitive control that enable workers to experience flow and its subsequent outcomes at work have largely been overlooked. This research proposes and provides empirical support for the "Cognitive Control Model of Work-related Flow," which integrates antecedents of flow at work related to the ability to focus concentration of cognitive resources toward experiencing flow at work. Along with flow at work, the model includes the antecedents of grit, flow metacognition, and mindfulness at work and the outcomes of work performance, engagement, and burnout. Findings across three studies (a cross-sectional, a time-lagged, and a one-day experience sampling method study) utilizing MTurk participants provided support for the model, as grit, mindfulness, and flow metacognition predicted flow, and flow predicted subjective performance, engagement, and burnout. Theoretical implications and the potential for developing flow interventions at work are discussed.

Difficulty-skill balance does not affect engagement and enjoyment: a pre-registered study using artificial intelligence-controlled difficulty

How does the difficulty of a task affect people's enjoyment and engagement? Intrinsic motivation and flow theories posit a 'goldilocks' optimum where task difficulty matches performer skill, yet current work is confounded by questionable measurement practices and lacks scalable methods to manipulate objective difficulty-skill ratios. We developed a two-player tactical game test suite with an artificial intelligence (AI)-controlled opponent that uses a variant of the Monte Carlo Tree Search algorithm to precisely manipulate difficulty-skill ratios. A pre-registered study (n = 311) showed that our AI produced targeted difficulty-skill ratios without participants noticing the manipulation, yet different ratios had no significant impact on enjoyment or engagement. This indicates that difficulty-skill balance does not always affect engagement and enjoyment, but that games with AI-controlled difficulty provide a useful paradigm for rigorous future work on this issue.

Escaping the Laboratory: An Escape Room to Reinforce Biomedical Engineering Skills

Commercial escape rooms have grown in popularity as an enjoyable experience that also doubles as an exercise in communication and collaboration. Educators can take advantage of these natural qualities to engage and support students in a low-stress learning environment. The primary goal of this study is to share the development and application of an educational escape room as a tool to provide biomedical engineering (BME) students with an immersive and practical experience. A BME laboratory course-specific escape room was developed and beta-tested on an initial group of BME students. The first set of feedback enabled improvements to the design and difficulty of the escape room, which was followed by the final release of the activity for the intended undergraduate BME course. Across an academic year, 74 participants agreed to provide survey feedback for this study. Despite a moderate escape rate (29%), students reported high satisfaction and enthusiasm for the activity. Student survey responses indicated that participants were engaged and empowered to successfully escape even without external motivators. Responses supported the effectiveness of the escape room as a BME learning environment, allowing students to practice and retain course-related knowledge in a challenging but low-risk activity. The foundational structure of escape rooms offers a beneficial environment for experiential knowledge application. We conclude that educational escape rooms show promise as a pedagogical tool in promoting enhanced knowledge retention through immersive, game-based learning.

Supplementary Information

The online version contains supplementary material available at 10.1007/s43683-022-00089-w.

Adventure-based mindsets helped maintain psychological well-being during COVID-19

OBJECTIVES

Research conducted during the COVID-19 pandemic underscores the value of physical activity and nature for psychological well-being in the general population when people's mobility and activities are restricted due to government mandates. Since restrictions may thwart the psychological benefits reported from participation in adventure recreation (e.g., rock-climbing, white-water kayaking), it is important to understand the psychological well-being of people who previously benefited from adventure opportunities. Thus, the purpose of this study was to investigate the lived experiences and psychological well-being of adventure recreation participants during COVID-19 restrictions.

DESIGN

A descriptive phenomenological approach was used.

METHOD

Participants were fifteen men, four women, and one non-binary person who engaged in a variety of adventure recreation activities that included ski-mountaineering, free-diving, rock-climbing, white-water kayaking, back-country skiing, skydiving, SCUBA diving, BASE jumping, and mountaineering. Participants had an average of 11.7 years of experience in at least one of their preferred adventure recreation activities. Participants were invited to take part in a visual and audio-recorded semi-structured interview on Zoom. Interviews lasted on average 69.3 min. Reflexive thematic analysis was undertaken inductively.

RESULTS

Overall, participants discussed a range of nuanced impacts that COVID-19 restrictions had on their psychological well-being. Participants discussed how negative affect resulted from restricted opportunities for physical and mental challenges, emotion regulation, connections to nature and people, and excitement. However, participants also benefited from several silver linings, such as reflecting on past adventures, a reduced need to compare themselves socially, and opportunities to spend quality time with others. Participants also explained how 'adventure-based mindsets' (e.g., resilience, focusing on controllable elements, humility) were protective strategies they used to limit the ill-being impacts of COVID-19 restrictions.

CONCLUSIONS

This study extends the alternative sport and exercise literature by illustrating how participation in adventure has the potential to enhance participants' resilience and their ability to maintain psychological well-being across diverse and novel contexts (e.g., the COVID-19 pandemic).

Positive Psychology and Philosophy-as-Usual: An Unhappy Match?

The present article critiques standard attempts to make philosophy appear relevant to the scientific study of well-being, drawing examples in particular from works that argue for fundamental differences between different forms of wellbeing (by Besser-Jones, Kristjánsson, and Kraut, for example), and claims concerning the supposedly inherent normativity of wellbeing research (e.g., Prinzing, Alexandrova, and Nussbaum). Specifically, it is argued that philosophers in at least some relevant cases fail to apply what is often claimed to be among their core competences: conceptual rigor—not only in dealing with the psychological construct of flow, but also in relation to apparently philosophical concepts such as normativity, objectivity, or eudaimonia. Furthermore, the uncritical use of so-called thought experiments in philosophy is shown to be inappropriate for the scientific study of wellbeing. As an alternative to such philosophy-as-usual, proper attention to other philosophical traditions is argued to be promising. In particular, the philosophy of ZhuangZi (a contemporary of Aristotle and one of the most important figures in Chinese intellectual history) appears to concord well with today’s psychological knowledge, and to contain valuable ideas for the future development of positive psychology.

Brain–Heart Interaction and the Experience of Flow While Playing a Video Game

The flow state – an experience of complete absorption in an activity – is linked with less self-referential processing and increased arousal. We used the heart-evoked potential (HEP), an index representing brain–heart interaction, as well as indices of peripheral physiology to assess the state of flow in individuals playing a video game. 22 gamers and 21 non-gamers played the video game Thumper for 25 min while their brain and cardiorespiratory signals were simultaneously recorded. The more participants were absorbed in the game, the less they thought about time and the faster time passed subjectively. On the cortical level, the fronto-central HEP amplitude was significantly lower while playing the game compared to resting states before and after the game, reflecting less self-referential processing while playing. This HEP effect corresponded with lower activity during gameplay in brain regions contributing to interoceptive processing. The HEP amplitude predicted the level of absorption in the game. While the HEP amplitude was overall lower during the gaming session than during the resting states, within the gaming session the amplitude of HEP was positively associated with absorption. Since higher absorption was related to higher performance in the game, the higher HEP in more absorbed individuals reflects more efficient brain–heart interaction, which is necessary for efficient game play. On the physiological level, a higher level of flow was associated with increased overall sympathetic activity and less inhibited parasympathetic activity toward the end of the game. These results are building blocks for future neurophysiological assessments of flow.

A Scoping Review of Flow Research

Flow is a gratifying state of deep involvement and absorption that individuals report when facing a challenging activity and they perceive adequate abilities to cope with it (EFRN, 2014). The flow concept was introduced by Csikszentmihalyi in 1975, and interest in flow research is growing. However, to our best knowledge, no scoping review exists that takes a systematic look at studies on flow which were published between the years 2000 and 2016. Overall, 252 studies have been included in this review. Our review (1) provides a framework to cluster flow research, (2) gives a systematic overview about existing studies and their findings, and (3) provides an overview about implications for future research. The provided framework consists of three levels of flow research. In the first “Individual” level are the categories for personality, motivation, physiology, emotion, cognition, and behavior. The second “Contextual” level contains the categories for contextual and interindividual factors and the third “Cultural” level contains cultural factors that relate to flow. Using our framework, we systematically present the findings for each category. While flow research has made progress in understanding flow, in the future, more experimental and longitudinal studies are needed to gain deeper insights into the causal structure of flow and its antecedents and consequences.

Flow theory in foreign and Russian psychology: history, contemporary state of arts and perspectives of development

The article describes the theoretical premises and the logic of the emergence of the Flow concept and its development in almost half of the century. The article presents an overview of the current state of arts in Flow theory being developed by M. Csikszentmihalyi and his followers. Different models of Flow are described, main directions of Flow research are analyzed, an overview of research methods and techniques are highlighted, including qualitative (interviews) and quantitative methods (questionnaires, experience sampling method (ESM). The possibilities and directions of further development of the Flow ideas and research, including interdisciplinary ones, are discussed. The ideas and concepts of representatives of modern Russian psychology, most close to the ideas of M. Csikszentmihalyi and their contribution to flow understanding are listed.

Optimal Experience in Adult Learning: Conception and Validation of the Flow in Education Scale (EduFlow-2)

While the formulation of Mihaly Csikszentmihalyi's theory of flow, including the experience dimensions, has remained stable since its introduction in 1975, its dedicated measurement tools, research methodologies, and fields of application, have evolved considerably. Among these, education stands out as one of the most active. In recent years, researchers have examined flow in the context of other theoretical constructs such as motivation. The resulting work in the field of education has led to the development of a new model for understanding flow experience in education, specifically dedicated to adult learning. As a result of both a meticulous analysis of existing models and consideration of more recent developments, a new flow scale has thus been developed. The aim of this study is therefore twofold: to validate the new flow measurement scale dedicated to the educational environment, EduFlow-2, and to test a new theoretical model. Students taking a course (N = 6,596), some on-site and others in a MOOC, participated. Several scales were administered online at the end of the participants' course during the 2017 academic year. The factor structure of EduFlow-2 was tested using Exploratory Structural Equation Modeling. Several models were tested. The model with a second-order factor best fit the data. We tested the invariance of the flow scale measure for gender and for the type of training (MOOC/on-site). We were able to show that the flow scale is invariant of the modalities of these two variables. Results revealed good psychometric qualities for the scale, making it suitable for both on-site and distance learning. The analysis also revealed significant relationships with the classic variables of motivation, self-efficacy, learning climate, and life satisfaction. Furthermore, all four dimensions of the model were found to be adequate and consistent with the underlying theoretical arguments. In the end, this new, short flow scale and the theoretical model were demonstrated to be promising for future studies in the field of education.

Towards a neo-configurational theory of intrinsic motivation

This research seeks to improve our understanding of how intrinsic motivation is instantiated. Three motivation theories, flow theory, self-determination theory, and empowerment theory, have informed our understanding of the foundations of intrinsic motivation at work. Taken jointly, they suggest six causal factors for intrinsic motivation: (1) perceived competence, (2) perceived challenge, (3) perceived autonomy, (4) perceived impact, (5) perceived social relatedness, and (6) perceived meaningfulness. Integrating different theoretical perspectives, I employ a case-based configurational approach and conduct coincidence analyses on survey data from a German public utility to analyse the nuanced interplay of these six causal factors for intrinsic motivation. My data show that high perceived meaningfulness or high perceived autonomy is sufficient for high perceived intrinsic motivation and at least one of the two conditions must be present. Further, my findings reveal a common cause structure in which perceived impact is not a causal factor for intrinsic motivation but an additional outcome factor. Subsequent analyses shed light on possible roles of the remaining proposed causal factors by drawing a tentative causal chain structure. The results of this study enhance our understanding of the causal complexity underlying the formation of intrinsic motivation.

Peripheral-physiological and neural correlates of the flow experience while playing video games: a comprehensive review

The flow state is defined by intense involvement in an activity with high degrees of concentration and focused attention accompanied by a sense of pleasure. Video games are effective tools for inducing flow, and keeping players in this state is considered to be one of the central goals of game design. Many studies have focused on the underlying physiological and neural mechanisms of flow. Results are inconsistent when describing a unified mechanism underlying this mental state. This paper provides a comprehensive review of the physiological and neural correlates of flow and explains the relationship between the reported physiological and neural markers of the flow experience. Despite the heterogeneous results, it seems possible to establish associations between reported markers and the cognitive and experiential aspects of flow, particularly regarding arousal, attention control, reward processing, automaticity, and self-referential processing.

Narrative and aesthetics as antecedents of perceived learning in serious games

Purpose

This study uses a critically acclaimed digital game as an instructional tool to explore the role of emotional design elements on psychological flow and perceived learning.

Design/methodology/approach

The authors employ transportation theory to generate a set of antecedents of psychological flow and the theory of flow to connect the gaming experience to positive learning outcomes. The authors investigate the subjective learning experience of players with the use of a psychometric survey, and the authors employ structural equation modelling (SEM) to unearth the direct as well as the indirect effects amongst narrative, aesthetics, flow and learning outcomes.

Findings

The findings of this study demonstrate that narrative and aesthetics in serious games positively influence the perceived learning by facilitating a state of psychological flow.

Research limitations/implications

This study contributes to better understanding and theorizing the role of narrative and aesthetics on learning outcomes in the context of serious games.

Practical implications

The findings of this study bear valuable implications for the design of serious games as they highlight the importance of elements often disregarded as not directly related to the learning process and are typically absent from the design of serious games.

Originality/value

Prior studies have identified aesthetics and narratives as design elements that contribute to the perceived enjoyment of a game; this study empirically investigates the role of narratives and aesthetics in enhancing perceived learning through psychological flow.

A Review on the Role of the Neuroscience of Flow States in the Modern World

Flow states have been shown to help people reach peak performance, yet this elusive state is not easily attained. The review describes the current state of literature on flow by addressing the environmental influences as well as the cognitive and neurocognitive elements that underlie the experience. In particular, the research focusses on the transition of cognitive control from an explicit to an implicit process. This is further expanded upon to look at the current, yet related neurocognitive research of high performance associated with the implicit process of automaticity. Finally, the review focusses on transcranial direct current stimulation (tDCS) as a novel method to facilitates an induction of flow states. Implications are aimed at a general technique to improve on skill acquisition and overall performance.

Internal and External Factors Underlying Variations in Adolescents' Daily Optimal Experiences

This study investigated how the internal psychological states (i.e., challenge-skill perception, positive and negative affect, and effortless attention) and contextual features (i.e., activity and company) of momentary experiences relate to optimal experience in adolescents' lives. Data were collected from 245 Portuguese adolescents (14-19 years old, 63% female) by using the experience sampling method. Multilevel modeling revealed that challenge-skill and positive affect were positively associated with optimal experience, while negative affect was negatively associated with optimal experience. Effortless attention mediated the associations between internal states and optimal experience, while activity and company only moderated some of these associations. These findings will inform practitioners about the factors that should be addressed in interventions with adolescents to promote optimal experiences in their lives.

Positive Emotions at Work and Job Crafting: Results From Two Prospective Studies

To date, research confirmed the effects of job crafting on the functioning of employees and organizations. In contrast, the evidence for the predictors of job crafting is limited. Based on broaden-and-build (B&B) theory, it may be assumed that high positive emotions at work would predict high job crafting behaviors at follow-ups. In line with social cognitive theory (SCT), it may be hypothesized that self-efficacy would mediate the relationship between positive emotions at work and following job crafting behaviors. The hypotheses were tested in a three-wave prospective study (Study 1, N = 124), with individual beliefs measured as the predictors. In a three-wave prospective Study 2 (N = 99), individual perceptions of collective flow at work and collective efficacy were assessed. Results of Studies 1 and 2 indicated that positive emotions at work predicted increasing structural resources, a job crafting dimension. Moreover, findings of Study 2 showed that collective flow at work predicted another job crafting dimension, i.e., increasing social resources. These results may inform good practices and help in designing individual- and team-level interventions enhancing job crafting behaviors.

Trans-Cultural Validation of the "Academic Flow Scale" (Flow 4D 16) in Arabic Language: Insights for Occupational and Educational Psychology From an Exploratory Study

Background: As an optimal psychological state, flow represents those moments when everything comes together for the performer. Flow is often associated with high levels of performance and is a positive psychological experience.

Aim: Our study aimed to validate the “Academic Flow Scale” (Flow 4D 16) in Arabic language across Tunisian population, and to test its factor structure, in terms of internal consistency/reliability, predictive validity, and sensitivity.

Methods: The population is composed of 320 students (139 men and 181 women) belonging to the University of Sfax, with a mean age of 22.26 years. The students voluntarily responded to the scale of academic flow (Flow 4D 16). Both exploratory (EFA) and confirmatory (CFA) factor analyses were performed.

Results: The four-dimensional alpha coefficients of the Flow 4D 16 indicate an excellent internal consistency, respectively, of 0.902 (Cognitive), 0.959 (Time), 0.974 (Ego) and 0.960 (Well-being). The CFA fit indices were satisfactory.

Conclusion: In summary, the 16-items model (original version) showed for all the indices an excellent fit to the theoretical model, confirming the four-dimensional factor structure among Tunisian student population.

Measuring Optimal Reading Experiences: The Reading Flow Short Scale

In transferring the concept of flow to the context of fiction reading a new approach to understanding the evolvement of reading pleasure is provided. This study presents the Reading Flow Short Scale (RFSS), the first reading-specific flow measurement tool. The RFSS was applied to 229 readers via online survey after 20 min of reading in self-selected novels. In a systematic analysis of psychometric properties, the RFSS’ factorial structure, reliability, and associations with theoretically related constructs were examined. As expected, the RFSS showed a two-factor structure, positive correlations with variables related to reading pleasure and flow, and an inverted U-shaped association with perceived fit between reader skills and text challenge. Comparisons of confirmatory factor analysis model confirmed that RFSS items loaded on different latent variables than items assessing other narrative engagement concepts, namely presence, identification, suspense, and cognitive mastery, and hence distinctly capture flow states in fiction reading. In sum, our findings indicate that the RFSS is a useful instrument for assessing flow states in fiction reading, thereby enriching the portfolio of measurement instruments in reading research.

Close games versus blowouts: Optimal challenge reinforces one's intrinsic motivation to win

When immersed in intrinsically motivating activities, individuals actively seek optimal challenge, which generally brings the most satisfaction as they play hard and finally win. To better simulate real-life scenarios in the controlled laboratory setting, a two-player online StopWatch (SW) game was developed, whose format is similar to that of a badminton tournament. During the game, a male opponent played by a confederate ensured that the same-sex participant paired with him won both matches, one with a wide margin (the lack of challenge condition) and another with a narrow one (the optimal challenge condition). Electrophysiological data were recorded during the entire experiment. An enlarged Stimulus-preceding negativity (SPN) was observed in the optimal challenge condition, indicating a more concentrated anticipatory attention toward the feedback and a stronger intrinsic motivation during close games. Thus, this study provided original neural evidence for predictions of Self-determination theory (SDT) and Flow theory, and confirmed and emphasized the significant role of optimal challenge in promoting one's intrinsic motivation to win.