Abstract
Aim
We examined scientific literature focusing on scouting practices in professional football, as well as presenting an evidence gap-map to facilitate future research.
Methods
The study followed the PRISMA 2020 and Cochrane's guidelines, and PRISMA extension for Scoping Reviews (PRISMA-ScR). The databases used were PubMed, Scopus, SPORTDiscus, and Web of Science. The eligibility criteria followed the PECOS approach.
Results
From 25,356 hits, 15 studies were eligible for inclusion in this scoping review, most were published between 2010 and 2020 (67%). Moreover, 80% of the studies were published over the last 10 years, and 33% (5 studies) since 2020. Additionally, we identified that the interest of studying this domain occurs most frequently in Europe. Moreover, the level of experience and qualifications possessed by the scouts plays a crucial role in their effectiveness. Finally, most of the studies selected pointed out the lack of academic or specific qualifications for scouts.
Conclusion
This scoping review underlined the complexity and variability of scouting practices in football, highlighting the need for standardization and the development of more robust and inclusive methodologies and instruments to better prepare scouts for the challenges of talent identification. Additionally, a lack of detailed demographic data and knowledge of the specialized qualifications possessed by scouts limits a full understanding. In this vein, structured evidence-based development programmes and the use of emerging technologies in football scouting may revolutionize the talent identification process.
Introduction
The conceptual elements of detecting, identifying, developing, and selecting talented players, 1 all play a crucial role in football.2,3 In this vein, the research distinguishes between the interrelate constructs of talent detection and development as well as talent identification and selection. 1 Talent detection can be considered as the first stage of the process with the challenge being to discover children, as well as adolescents, with good athletic talent or potential to participate in sports training.1,2 Additionally, talent identification is the process of identifying ‘talent’ through the observation or measurement of individual skills or attributes to systematically explore and cultivate such characteristics (i.e., looking for young athletes who have the potential to become outstanding athletes).1,3 The talent pathway is viewed on a continuum from immediate performance (present) to predictive success (future).
In football, its common that scouts may often identify and select promising young players by assessing their ‘talent’ during competition. Scouts need to make informed decisions to select the most promising players to excel at the elite level. 4 In this context, scouts, a term used to address the talent scout or recruiter, 2 are responsible for the process of identifying talent to meet the needs of clubs, academies and national teams to build a solid foundation for success. 5
The need to discover talented football players presents several challenges to scouts 6 and its inherent complexity is partly due to the specificities of each stage of talent development (e.g., each stage plays an integral part of the talent training process). 1 Moreover, scouts are faced with the difficult task of selecting future top-level players at an early stage in their careers, 6 and there is constant pressure to identify promising young players before other rival clubs or associations. The difficulty of early talent selection, and the related inappropriate exclusion of late-developing talent, encourages an extended and long-term focus on development. 7 Ultimately, talent detection and identification should be seen as ongoing processes, and talent selection should be reserved for later stages and be dynamically revised since performance is inherently multifaceted and complex. 3 Therefore, talent identification and its development are multidimensional and nonlinear.
In top-level elite youth football, clubs and associations are now increasingly reliant on scouts, who take on a prominent role as specialists responsible for identifying, evaluating, and recruiting young talented players.5,8 Such a task necessitates that scouts evaluate tactical-technical skills, 9 as well as physical and psychological characteristics. 10
Beyond football-specific skills and physical attributes, scouts can rely on their knowledge of players specific education, years of experience and the systematic exchange of know-how with top-level colleagues.11,12 Potentially, differences in the scouts’ qualifications and training (i.e., coaching license, academic graduation, professional experience, familiarization with different levels of practice and stages of development) may lead to poor or inconsistent identification and selection of players. Therefore, it seems that the success or failure of scouts relies on their knowledge and sport-specific background.
While scouting in football is crucial, academic literature dedicated to this topic is scarce. Most available knowledge derives from practical experience, with only a few scientific studies analysing the procedures, criteria, and tools used, or the typical profile of scouts.1,4 This gap in our knowledge can hamper the effectiveness of the talent detection and selection process in football, leading to an under-use of resources and possible loss of young talented players. A scoping review can provide a first step to organizing the existing literature and mapping existing knowledge about those involved in scouting young football players (e.g., observation strategies and criteria, data collection tools, qualifications). Likewise, relevant knowledge gaps can be identified and help guide future research1,4 and an evidence gap map (EGM) 13 may help to highlight the most relevant areas for investigation. This information may provide valuable guidance for scouts, coaches and other professionals interested in improving their skills to identify and develop talented football players, while at the same time, inspiring clubs, academies, associations, and other education institutions to foster structured programmes to train scouts.
Materials and methods
This scoping review with EGM was registered on the Open Science Framework (OSF) platform on May 31, 2023, three months before the searches were performed (project: https://osf.io/hrm4q; registration doi: https://doi.org/10.17605/OSF.IO/7XNTF). We followed the PRISMA 2020 guidelines, 14 and PRISMA extension for Scoping Reviews (PRISMA-ScR) 15 and Cochrane's guidelines. 16
Eligibility criteria
We included original research papers published in peer-reviewed journals, without restrictions concerning publication date or language, and no filters applied. Eligibility criteria followed the Participants, Exposure, Comparators, Outcomes, Study Design (PECOS) approach: (1) football (soccer) scouts with no restrictions concerning sex or age; (2) exposed to processes of detection, identification, and/or selection of football players with no restrictions concerning player sex, age, or participation level corresponding to the Participant Classification Framework (PCF) 17 Tier 1 – Recreationally Active, Tier 2 – Trained/Developmental, Tier 3 – Highly Trained/National Level, Tier 4 – Elite/International Level and Tier 5 – World Class, but excluding Tiers 0 (Sedentary); (3) comparators were optional; (4) any data related to the profile of the scouters (e.g., qualifications); (5) no limitation was placed regarding study design.
Information sources
Searches were conducted on September 26, 2023, and updated on November 14, 2024, using PubMed, Scopus, SPORTDiscus and Web of Science (core collections) databases. Manual research was conducted using the reference lists of the included studies. Afterwards, snowball citation tracking was performed using Web of Science. To gather additional suggestions for potentially relevant studies, two external experts (PhD, with published research on the topic) were consulted (NG and JM-A). A waiting period of three weeks was allotted for the first response, with a reminder sent after the initial two weeks. In the event of a positive response, an additional four-week period was granted to complete the task. Finally, a search was conducted to identify any errata or retractions related to the studies included. 16 If any pre-registered protocols or supplementary files existed for the included studies, these were collected.
Search strategy
The general search strategy was used of free text terms and the Boolean operators AND/OR, with one line of code referring to the Title/Abstract: (Soccer OR Football*), and three code lines referring to all fields: (Identif* OR Recogniz* OR Recruit* OR Select* OR Deselect* OR Detect* OR Develop* OR Predict* OR Track*) AND (Talent* OR Gift* OR Expert*) AND (Scout* OR HeadHunt* OR Coordenat* OR Coach* OR Decis*). The full search strategies for each database are presented in Supplementary Table 1.
Selection process
Automated removal of duplicates was performed using EndNoteWeb (ClarivateTM), but further manual removal of duplicates was required. SR and AP independently screened each record retrieved in two stages: (i) screening of titles and abstracts; (ii) full text analysis. In case of disagreements between the two authors, FC provided arbitrage until consensus was achieved.
Data collection process
SR and AP performed independent data collection from reports. In the event of disagreements between the two authors, FC provided arbitration until consensus was reached. All data were organized and coded using a specifically designed Microsoft® Excel worksheet. The final data on competitive level were coded by three authors (SR, AP and FC) using Tier 1 or higher of the Participant Classification Framework. 17 If any relevant data or contextual information were missing, the authors of the respective studies were contacted via email, allowing a three-week period for response (including a reminder after the first two weeks). If no response was received within three weeks, and the missing information was deemed necessary based on the eligibility criteria, the study was excluded. However, if the missing information was not crucial for the eligibility criteria, the study was included in the review.
Data items
Outcomes: indicators characterizing the football scouts involved in detection, identification, and/or selection of players. This included (but was not limited to): (i) age, sex, qualifications (e.g., academic degrees, coaching licenses), profile, criteria implemented to perform their tasks; (ii) age, sex, and competitive level of the groups where the scouter acts, among others. Competitive levels were classified according to the PCF. 17 Additional information included (but was not limited to): sample size, geographical location, funding, and competing interests.
Data management and synthesis methods
A narrative synthesis was executed, accompanied by data summaries (number, percentage) for the pre-defined data elements. To present an overview of the current body of knowledge and the associated research deficiencies, an EGM was built to illustrate the existing evidence landscape and the present research gaps.13,18–20
Results
Study identification and selection
The search yielded a total of 25,356 hits (Figure 1). Of these, 11,786 duplicates were removed. The remaining 13,570 records were analysed for relevance based on their titles and abstracts, of which 12,669 were excluded. From the remaining 901 full texts, 684 were excluded based on not being original research papers, and a further 162 were not published in peer-reviewed journals. Finally, a total of 43 studies21–62 were excluded because they did not meet the PECOS criteria (i.e., Criteria 1: n = 9,23,26,29,31,37,47,48,50,61 and criteria 2: n = 3421,22,24,25,27,28,30,32–36,38–46,49,51–60,62), leaving 12 studies for data extraction and further analysis.56,63–73

PRISMA 2020 flow diagram.
Two more articles were identified as eligible through snowballing, which were reviewed and integrated,74,75 and after this list was reviewed by the external experts, one more study identified through the list of references was suggested. 76 To meet the required eligibility criteria, the authors of one study 77 were contacted by email and via ResearchGate, simultaneously. However, no response was obtained, so this work was excluded. Ultimately, 15 studies were included in the review63–76 (Figure 1).
Study characteristics
Characterization and contextual-related information of the included studies
The studies were published between 2009 76 and 2023.64,67 Most studies (67%) where published between 2010 and 2020.56,63,65,66,69–73,75 Altogether, 80% of the studies were published over the last 10 years, and 33% since 2020.56,64,67,68,74 Only one study (7%) was published before 2010. 76
From the 15 selected studies, only six provided the information about the sample size of the athletes that scouters evaluated.56,65,67,69,70,72 The smallest sample used was 24 athletes 67 and the largest was 556 athletes, 56 and the age of the athletes ranged from U7 to professional athletes, but three studies did not report any information64,68,76 (Table 1). Additionally, eight of the 15 included studies reported that the athletes who participated in the studies were classified at a Provincial/State or Academy Programs (Tier 3).56,65–67,69,71–73
Characterization and contextual-related information of the included studies.
NA: Information not available.
Procedures used by the scouts to identify talent players
Regarding the evaluation methods implemented, 10 studies used questionnaires or interviews semi-structured with the scouts.63,64,66,67,69,71,73–76 As for the other five studies,56,65,68,70,72 the methods were varied, ranging from analysis of physical, technical, tactical knowledge or using a mathematical model that prioritizes player attributes, among others.
Different methods were used to understand the scouts and coaches mindset or procedures, including questionnaires with 10, 73 18 63 and up to 36 questions 64 employed. Other studies have used standardized questionnaires such as the Nomination Scale for Identifying Football Talent (NSIFT), 56 and Qualtrics. 74 In the study conducted by Orosz and Mezo 69 more instruments were used, where some of them were used for athletes and others for coaches, particularly; Sports Background Questionnaire (SBQ), Tennessee Self-Concept Scale (TSCS), Psychological Immunological Competence Inventory (PICI), Athletic Coping Skills Inventory (ACSI); Advanced Progressive Matrices (APM), and specific questionnaires were administered to the players’ coaches and teammates. However, to identify talented football players only a few studies56,65 reported that scouts or coaches used specific-football instruments (e.g, GPS, GTS, GPET) or maturational indicators (e.g., SA, age prediction by PHV). 72 Additionally, only three studies65,69,75 tried to identify the performance indicators that scouts used to identify talent youth players during different time points (i.e., longitudinal study).
Moreover, Larkin and O'Connor 75 identified and evaluated the main characteristics and attributes considered important by football recruiters and coaches for identifying talent young players, categorizing into technical, tactical and psychological skills as the main criteria. However, the psychological criteria were the most frequently highlighted by scouts or coaches.56,63,64,66,68,69,71 Additionally, Pedroza-Junior 73 suggested the importance of restructuring and organizing the youth department in a professional manner, creating an exclusive department for attracting and managing young footballers. Recently, the characteristics of a talented player were categorized as personality factors, teamwork skills, decision-making, tactical-technical skills and expectations of success, 64 independently of playing position. Moreover, Ozceylan 70 proposed a solution where scouts prioritised the main attributes of each player based on the positions by using the AHP.
Characteristics of the scouts
The studies that characterized the scouts and its context-related information per year are presented in Table 2.
Characteristics of the scouts and its context-related information in the included studies.
NA: Information not available.
We identified that the interest of studying this domain occurs more frequently in Europe, with ten countries identified (Spain = two; Switzerland = two; Turkey = one; Hungary = one; England = one; Romania = one; Norway = one; Denmark = one; Netherlands = one; Germany = one). Two studies were carried out in Brazil and one in Australia (Figure 2).

Distribution of the included studies per scouts and its qualifications, continent, and country.
Regarding the qualifications of scouts or coaches, two studies reported academic qualifications,70,76 three studies presented coach qualifications,65,66,71 while two studies reported both coach and academic qualifications,56,72 one study reported a scout specific-qualification, 67 and, surprisingly, nine studies did not report any information about their qualifications.63,64,66,68,69,73–75
Additionally, we observed that an average of 295 scouts were used in the studies identified, ranging from 2 65 to 2499, 68 and the median value was 21 scouts, with an interquartile range of 90. Regarding the age of the professionals included, only the studies of Nilsen et al. 68 and Bergkamp et al. 74 presented these data. In the study of Nilsen et al. 68 most of the scouts were men and women between the ages of 16 and 83 years old. The average length of scouts’ experience was ten years, with the shortest being 4.8 years, 67 and the longest being 28 years. 76 Probably, this last item supported the importance of experience in football to identify and select talented youth players, combined with their coaching practice. 76
The scouts were mainly football coaches, whereas in some studies they were coaches at youth level and others at senior level, either for participation in regional or national competitions, and some of them held a UEFA-A or UEFA-B license.56,65,66,72 Four studies did not report the level or age at which the scouts worked,64,68,70,76 and this detail was reported in the other studies, which ranged from T2 to T4. 17
Evidence gap-map of the included studies
Figure 3 presents the EGM that synthesizes the patterns and gaps that were previously identified, suggesting that the order of importance for each criteria used to identify talented football players were psychological, physical, technical, experience of the scouts, tactical and subjective (e.g., scout's vision). In addition, the studies included pointed out the lack of specific qualifications possessed by those responsible for identifying and selecting future players.

Evidence gap-map of scouting research.
Discussion
We examined the existing scientific literature that deal with scouting practices in football to promote increased understanding of the practices used in talent detection and selection, as well as providing an EGM about the studies conducted in football. The results obtained from this review highlight the identity and qualifications of the scouts, and the strategies used to identify and select talented football players, providing an insight into the scouting process.
In the present review 15 articles were included. Altogether, four studies did not state the age of the players assessed,65,68,75,76 while the remaining articles assessed age groups ranging from U8 to seniors. It is important to evaluate different age groups since the characteristics and development of players vary significantly across age. 2 Moreover, as evidenced by EGM (Figure 3), the scouts need to stablish a consensus in prioritising the main characteristics in identifying and selecting talented players for each specific-position. In this sense, the early identification of football players (6–8 years old) might focus on specific-motor and psychological criteria, and a more systematic and organized participation of the local authorities (e.g., schools, clubs) in promoting organized football competitions for children in this age group and involving families in maintaining children's interest in sports activities. Therefore, including a wide range of age groups, for example in longitudinal studies, could allow for a more complete and diverse view of scouting practices and the characteristics of players at different stages of physical and cognitive development.
Additionally, only five studies56,65,69,70,72 presented the sample size of the athletes evaluated, with an average of 247 athletes, ranging from 30 70 to 536. 56 This variation suggests that studies on scouting can focus either on detailed analyses of smaller groups or on broader, more generalizable studies. In this vein, Sagar 78 supports the need for a diversity of sample sizes to capture different aspects of performance (e.g., physical, tactical-technical, psychological) and their potential (e.g., quantitative and/or qualitative data). For example, Larkin and O'Connor 75 recommended a holistic, multidisciplinary approach to talent identification, valuing technical, tactical, and psychological attributes more than physiological, anthropometrical, and sociological ones for U13 teams. Moreover, the concepts of prediction and selection are inherently linked, since predictions can only be made through consideration of existing qualities for performance, and consequently attributes which contribute to current performance levels are not the only contributors for prediction. On the other hand, to strengthen the studies in this domain a wide range of age groups should be employed, and a longitudinal observational and evaluative framework is needed, reducing a gap in existing literature (Figure 3).
No consistent or standardized criteria were employed with measures covering a wide range of factors that can influence performance and future potential were applied in the most of studies selected.56,63,64,66,67,69,71,73,74 Albeit some efforts were detected in some studies, which ranged from analysis of technical, tactical and physical abilities to analyses using mathematical models that prioritize player attributes.65,68,70,72,75,76 For example, the instruments varied widely from questionnaires with ten, 73 18 63 and up to 36 questions 64 developed by the authors themselves, and some of them without specific validation for their proper use. In this sense, the lack of standardization in methods and instruments might reflect the complexity and subjectivity of scouting in football, or the need to employ systematic instruments to ensure the reliability and validity of assessments. Additionally, the instinct of scouts 72 derives from idiosyncratic combinations of and compensations for individual performance factors (e.g., psychological, physical and technical skills, and game intelligence of the payers). Therefore, the use of a multidimensional approach,75,79,80 combined with a machine-learning approach 81 might be crucial in developing new knowledge in this domain.
In the present study an average of 268 scouts were observed in different studies published, with some of them reporting a minimum of two 65 and a maximum of 2499 participants. 68 This large variation of the number of scouts used in the selected studies highlight considerable diversity in the methods used since it is recommended that when a small sample of scouts use the qualitative method allows a more detailed and in-depth analysis of the practices and challenges faced 82 and with larger samples the use of quantitative methods provides a more comprehensive and statistically robust view of general trends and patterns in scouting. 83 Moreover, only two studies64,74 included information on the age of the scouts, with an average of 53 years, ranging from 33 to 64 years old. In addition, the length of experience of the scouts was highlighted, with an average of 10 years, ranging from five years 72 to 28 years. 74 The experience characteristic and high-average age of scouts is sought to be the only certificate to detect and select players.84,85
In this vein, our findings suggest that when the criteria of talent scouts were only their age or experience the results shows low agreement with player rankings, inconsistencies in selection decisions, relied on intuitive approaches rather than structured methods, personal heuristics and distinct learning experiences. Therefore, alternatively the use of mathematical models, emerging technologies (e.g., artificial intelligence, big data software) and better articulation between the football stakeholders might help in prioritizing the best player's attributes into the scouting process and future decisions. For example, Altmann et al. 81 provided useful insights on which parameters might be worth monitoring with regards to talent selection processes within highly trained youth football players and how to employ supervised gradient boosting algorithms adapting the machine learning approach to a new practice context (i.e., competitive level, academies).
A geographical concentration of research in regions that also have a strong football tradition, such as Europe, was observed in the present scoping review. Of the 15 studies eligible for this review, 12 were conducted in Europe,56,63–70,72,74,76 two in Brazil71,73 and one in Australia. 75 The lack of demographic data in many studies represents a significant gap in the literature, which could compromise a better understanding on how experience and maturity influence scouting practices, as well as whether there are any regional issues that may favour particularities in the way scouts carry out their mission more comprehensive demographic information. Therefore, more studies from different countries and continents are needed to better understand the scouting practices according to their cultural and specific-context diversity.2,86
The results of the present study revealed that scouts were mainly football coaches at youth level or adult level, holding either a UEFA-A or UEFA-B license.56,65,66,71,72 Only one study reported that scouts had a scouting training program provided by their national association. 67 Unfortunately, most of the studies did not report the qualifications of the scouts.63,64,68,69,73–75 In this sense, better qualifications (i.e., academic, sport or specific qualification) might help them to better recruit talent players and optimize the selection procedures. Moreover, the organizations (e.g., football associations, universities, clubs) should develop or adopt a structured and standardized worldwide curricular program (course) that could improve the specific knowledge among the scouts, increasing the accuracy of selection decisions and highlighting the complexity of the talent evaluation process in youth football. A good example of worldwide best practices is the talent scout education developed by Swiss Football Association and the FA talent ID pathways designed to identify and develop talented football players in England. However, more educational programs and workshops based on scientific evidence in different world regions can improve scouts’ skills and knowledge, helping them to keep up to date with best practices and innovations in the field.
The results revealed a significant variation in sample size and a lack of comprehensive demographic data. To advance the understanding of football scouting, it is crucial to integrate diverse methodological approaches and increase the collection of demographic data. Professionalization and continuous training of scouts are essential to meet current and future challenges in football. In future, to better understand the profile of the scouts, researchers should include more demographic and certification data (age, length of experience, specialized or generic formation), and stakeholders polices implemented. In addition, the use of mixed methodologies (quantitative and qualitative) should be encouraged to capture a more complete view of scouting. The creation of collaborative networks between researchers and institutions can standardize data collection and facilitate large-scale studies. The integration of qualitative and quantitative approaches can provide a richer and more complete understanding of scouting in football. In future, researchers should seek to combine these methods to capture both the subjective and objective aspects of the role.
Limitations
This study in football scouting has several limitations that should be considered. First, there is great variability in the size of the samples analysed, with an average of 268 scouts, ranging from a minimum of two 65 to a maximum of 2499 68 participants. This large variation can make it difficult to generalize the results, as studies with very small samples may not be representative of the scouting population. In addition, the lack of comprehensive social and demographic data limits the understanding of how factors such as age, gender and professional background influence scouting practices. Another limitation was that of the 15 articles analysed 12 were carried out in Europe,56,63–70,72,74,76 as this geographical concentration may not reflect scouting practices in other regions around the world.
Although some researchers have used a variety of instruments to assess different abilities of players, most have not adopted a multidimensional approach. Talent assessment in football is complex and multifaceted, and a more holistic approach could provide more complete insights. It is important that in future research on scouting efforts are made to increase the size and representativeness of the samples, including more demographic data from the scouts and clearly state the age groups assessed and the qualifications of the scouts. In addition, it is necessary to broaden the geographical diversity of studies, establish standardized assessment methods, used reliable and consistent assessment instruments, and adopt a multidimensional approach to capture the complexity of talent identification in football. These recommendations can help direct future research and improve understanding of scouting practices, contributing to the development of more robust and effective methods.
The implications of this study are vast and significant, ranging from improving scouting practices and training to influencing policies for developing young athletes and future research directions. By addressing the limitations identified and implementing the recommendations suggested, clubs, organizations and researchers can advance the identification and development of talent in football, contributing to the growth and professionalization of the sport.
Conclusions
This study on football scouting offers several important conclusions that could impact both practice and future research. First, the study reveals that there was no clear consensus on the best scouting practices, highlighting the need to develop more uniform methodologies and similar instruments with the integration of different stakeholds and the creation of specific programmes by universities and national football associations. Second, the average age, length of scouts’ experience and their qualifications play a crucial role in scouting effectiveness to better understand the attributes required for success in football, but the lack of more detailed demographic data and specialized qualification limits a full understanding of this influence. In addition, the lack of comprehensive demographic data on scouts and the geographical concentration of studies in Europe highlight significant gaps in the existing literature and prevent a more global and inclusive view of scouting practices. Lastly, structured evidence-based development programs are essential for the technical and personal growth of young players, where the use of mathematical models and emerging technologies in football scouting may have significant potential to revolutionize talent identification.
In summary, this study underlines the complexity and variability of scouting practices in football, highlighting the need for standardization and the development of more robust and inclusive methodologies. The results of this review provide valuable guidance for clubs, academies, associations, coaches, scouts and sports professionals interested in improving their strategies for identifying and developing talented football players, relying on multi-disciplinary collaboration and more inclusive research practices.
Supplemental Material
sj-docx-1-spo-10.1177_17479541251365776 - Supplemental material for What does research tell us about scouting in football? A scoping review with evidence gap-map
Supplemental material, sj-docx-1-spo-10.1177_17479541251365776 for What does research tell us about scouting in football? A scoping review with evidence gap-map by Sérgio Ribeiro, Filipe Casanova, José Afonso, Alberto Pompeo, Everton Luís Rodrigues Cirillo, Sixto González-Víllora, Pedro Teques, Daniel Duarte and Andrew Mark Williams in International Journal of Sports Science & Coaching
Footnotes
Availability of data,code,and other materials
Contribution of each author
SR: research concept and study design, data collection, data analysis and interpretation, and writing the manuscript;
FC: research concept and study design, data analysis and interpretation, writing the manuscript, and final approval of the article to be published;
JA: research concept and study design, data analysis and interpretation, writing the manuscript, and final approval of the article to be published;
AP: writing the manuscript, data collection and data analysis and interpretation;
ELRC: data collection and data analysis and interpretation;
SG-V: data collection and data analysis and interpretation;
PT: writing the manuscript, and reviewing/editing a draft of the manuscript;
DD: writing the manuscript, and reviewing/editing a draft of the manuscript;
AMW: research concept and study design, writing and editing the manuscript.
Data availability statement
The data research is available in the paper.
Declaration of conflicting interests
The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
Funding
Registration and protocol
The protocol was pre-registered in OSF (project: https://osf.io/hrm4q; registration doi:
).
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References
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