[
  {
    "year": "2015",
    "venue": "CHI PLAY Workshop",
    "title": "The HEXAD Gamification User Types Questionnaire: Background and Development Process",
    "authors": "Diamond, L., Tondello, G. F., Marczewski, A., Nacke, L. E., & Tscheligi, M.",
    "finding": "Documents the rationale and design decisions behind the HEXAD questionnaire before its formal validation, tracing how the six types emerged from motivational theory, player type research, and practical design experience. Establishes the instrument lineage that the 2016 CHI PLAY scale paper formalised. Essential reading for understanding why individual items are worded the way they are.",
    "tags": [
      "validation",
      "foundational"
    ],
    "n": null,
    "flags": [],
    "doi": null,
    "doi_label": "CHI PLAY 2015 Workshop (hcigames.com)"
  },
  {
    "year": "2015",
    "venue": "Book",
    "title": "User Types — Even Ninja Monkeys Like to Play",
    "authors": "Marczewski, A.",
    "finding": "First formal publication of the HEXAD framework. Introduced the six orientations mapped to SDT-derived motivations (RAMP), with design implications for each type.",
    "tags": [
      "validation",
      "foundational"
    ],
    "n": null,
    "flags": [],
    "doi": null,
    "doi_label": "ISBN: 978-1514745663"
  },
  {
    "year": "2016",
    "venue": "CHI PLAY",
    "title": "The Gamification User Types Hexad Scale",
    "authors": "Tondello, G. F., Wehbe, R. R., Diamond, L., Busch, M., Marczewski, A., & Nacke, L. E.",
    "finding": "Introduced the 24-item validated scale. Reported factor analysis, internal reliability, test-retest reliability, Big Five associations, and the first empirical HEXAD-to-mechanic element correlations.",
    "tags": [
      "validation",
      "foundational",
      "mechanics"
    ],
    "n": "N=133",
    "flags": [],
    "doi": "10.1145/2967934.2968082"
  },
  {
    "year": "2017",
    "venue": "CHI PLAY",
    "title": "Elements of Gameful Design Emerging from User Preferences",
    "authors": "Tondello, G. F., Mora, A., & Nacke, L. E.",
    "finding": "Classified 47 gameful design elements into eight preference-based groups via factor analysis. Found significant correlations between HEXAD types and element group preferences. Established the taxonomy (Immersion, Progression, Risk/Reward, Customisation, Socialisation, Altruism, Assistance, Incentive) that underpins most subsequent mechanic-mapping research.",
    "tags": [
      "mechanics",
      "validation"
    ],
    "n": "N=282",
    "flags": [],
    "doi": "10.1145/3116595.3116627"
  },
  {
    "year": "2018",
    "venue": "CHI",
    "title": "Personalizing Persuasive Strategies in Gameful Systems to Gamification User Types",
    "authors": "Orji, R., Tondello, G. F., & Nacke, L. E.",
    "finding": "Different HEXAD scores predict different perceived persuasiveness of 10 persuasive strategies. Social strategies align strongly with Socialiser tendencies. Mismatched strategies can actively demotivate some types.",
    "tags": [
      "health",
      "mechanics"
    ],
    "n": ">500 (N=543)",
    "flags": [
      "flag-large"
    ],
    "doi": "10.1145/3173574.3174009"
  },
  {
    "year": "2018",
    "venue": "IJATE",
    "title": "Adaptation of the Gamification User Types Hexad Scale into Turkish",
    "authors": "Akgün, Ö. E., & Topal, M.",
    "finding": "First non-English adaptation of the HEXAD scale, validated with Turkish university students. Confirms the six-factor structure with acceptable reliability and construct, convergent, and discriminant validity. The final Turkish version uses 22 of the original 24 items after removing two with weak factor loadings — a finding that prefigured later psychometric refinements.",
    "tags": [
      "crosscultural",
      "validation"
    ],
    "n": "N=330",
    "flags": [],
    "doi": "10.21449/ijate.379139"
  },
  {
    "year": "2019",
    "venue": "IJHCS",
    "title": "Empirical Validation of the Gamification User Types Hexad Scale in English and Spanish",
    "authors": "Tondello, G. F., Mora, A., Marczewski, A., & Nacke, L. E.",
    "finding": "Factor structure confirmed in English and Spanish. Philanthropist, Free Spirit, and Achiever most prevalent. Disruptor least common. Age and gender correlations reported. Multi-study design with N=668.",
    "tags": [
      "validation",
      "crosscultural"
    ],
    "n": ">500 (N=668)",
    "flags": [
      "flag-large"
    ],
    "doi": "10.1016/j.ijhcs.2018.10.002"
  },
  {
    "year": "2019",
    "venue": "Interacción",
    "title": "The Quest for a Better Tailoring of Gameful Design",
    "authors": "Mora, A., Tondello, G. F., Calvet, L., González, C., Arnedo-Moreno, J., & Nacke, L. E.",
    "finding": "Dominant type is insufficient for tailoring — user profiles should be treated as multi-dimensional combinations. Some expected type-element pairings were weaker than anticipated, including gifting for Philanthropist.",
    "tags": [
      "mechanics",
      "education"
    ],
    "n": null,
    "flags": [],
    "doi": "10.1145/3335595.3335625"
  },
  {
    "year": "2019",
    "venue": "PERSUASIVE",
    "title": "Combining Behavior Change Intentions and User Types to Select Gamification Elements",
    "authors": "Altmeyer, M., Lessel, P., Muller, L., & Krüger, A.",
    "finding": "HEXAD-element relationships in physical activity exist, but behaviour-change intention stage shifts which elements are relevant for each type. Static element playlists per type are likely suboptimal.",
    "tags": [
      "health",
      "mechanics"
    ],
    "n": null,
    "flags": [],
    "doi": "10.1007/978-3-030-17287-9_27"
  },
  {
    "year": "2020",
    "venue": "Contemporary Educational Technology",
    "title": "Adaptation of Modified Gamification User Types Scale into Turkish",
    "authors": "Taşkın, N., & Kılıç Çakmak, E.",
    "finding": "Re-adapted the HEXAD scale into Turkish using the revised Tondello et al. (2019) items rather than the original 2016 version, correcting the psychometric limitations of the earlier Akgün & Topal (2018) adaptation. Validated with 330 university students, confirming the updated six-factor structure. Represents the current recommended Turkish instrument and bridges the gap between the 2016 and 2019 scale versions.",
    "tags": [
      "crosscultural",
      "validation"
    ],
    "n": "N=330",
    "flags": [],
    "doi": "10.30935/cedtech/7942"
  },
  {
    "year": "2020",
    "venue": "Frontiers in CS",
    "title": "Validation of User Preferences and Effects of Personalized Gamification on Task Performance",
    "authors": "Tondello, G. F., & Nacke, L. E.",
    "finding": "Observed element choices partly aligned with HEXAD scores. Personalisation improved some performance measures. Critically: post-use preferred elements did NOT correlate with HEXAD scores — users drift from their predicted preferences.",
    "tags": [
      "validation",
      "mechanics",
      "temporal"
    ],
    "n": "N=252 across two studies",
    "flags": [
      "flag-null"
    ],
    "doi": "10.3389/fcomp.2020.00029"
  },
  {
    "year": "2020",
    "venue": "CHI PLAY",
    "title": "Tailoring Gamification for Adolescents — Validation of Big Five and Hexad in Dutch",
    "authors": "Ooge, J., De Croon, R., Verbert, K., & Vanden Abeele, V.",
    "finding": "Both Big Five and HEXAD performed substandard in a Dutch adolescent sample. Suggests simplifying instruments and reformulating items for younger populations. Current adult instruments should not be assumed to transfer cleanly to adolescents.",
    "tags": [
      "crosscultural",
      "validation"
    ],
    "n": "N=402",
    "flags": [],
    "doi": "10.1145/3410404.3414267"
  },
  {
    "year": "2020",
    "venue": "CHI PLAY",
    "title": "Disambiguating Preferences for Gamification Strategies to Motivate Pro-Environmental Behaviour",
    "authors": "Van Houdt, L., Millecamp, M., Verbert, K., & Vanden Abeele, V.",
    "finding": "Contextual intrinsic motivation toward the environment predicted gamification strategy preferences better than HEXAD alone. HEXAD fell short in this domain — domain-specific motivation measures should supplement type profiling.",
    "tags": [
      "sustainability"
    ],
    "n": "N=56 (22 days)",
    "flags": [
      "flag-null"
    ],
    "doi": "10.1145/3410404.3414244"
  },
  {
    "year": "2020",
    "venue": "JEIM",
    "title": "Exploring Gamified Persuasive System Design for Energy Saving",
    "authors": "Böckle, M., Novak, J., & Bick, M.",
    "finding": "HEXAD user types shape perceived persuasiveness of persuasive strategies. Socialiser tendency associated with broad responsiveness. Existing conservation behaviour also matters — segment by HEXAD and baseline behaviour.",
    "tags": [
      "sustainability"
    ],
    "n": "N=480",
    "flags": [],
    "doi": "10.1108/JEIM-02-2019-0032"
  },
  {
    "year": "2020",
    "venue": "IJERPH",
    "title": "Adaptation and Validation of the Scale of Types of Users in Gamification with the Spanish Adolescent Population",
    "authors": "Manzano-León, A., Camacho-Lazarraga, P., Guerrero-Puerta, M. A., Guerrero-Puerta, L., Alias, A., Trigueros, R., & Aguilar-Parra, J. M.",
    "finding": "Successfully validated the HEXAD scale with a large Spanish adolescent sample (ages 13–18). CFA confirmed the six-factor structure and multi-group invariance by sex — boys and girls interpreted the scale equivalently. Contrasts with Dutch adolescent validation which found the instrument unsuitable, suggesting language and cultural context are significant moderators.",
    "tags": [
      "crosscultural",
      "validation",
      "education"
    ],
    "n": ">500 (N=1,345)",
    "flags": [
      "flag-large"
    ],
    "doi": "10.3390/ijerph17114157"
  },
  {
    "year": "2020",
    "venue": "CHI PLAY",
    "title": "HexArcade: Predicting Hexad User Types By Using Gameful Applications",
    "authors": "Altmeyer, M., Tondello, G. F., Krüger, A., & Nacke, L. E.",
    "finding": "Interaction behaviour within two purpose-built mini-games correlates significantly with HEXAD questionnaire scores, demonstrating types can be inferred from gameplay without a survey. Participants rated the apps as more enjoyable and immersive than the questionnaire. Opens a practical path to low-friction, in-situ HEXAD profiling for deployed systems.",
    "tags": [
      "validation",
      "mechanics"
    ],
    "n": "N=147",
    "flags": [],
    "doi": "10.1145/3410404.3414232"
  },
  {
    "year": "2021",
    "venue": "HCII",
    "title": "Player Types and Game Element Preferences: Investigating the Relationship with the Gamification User Types HEXAD Scale",
    "authors": "Krath, J., & von Korflesch, H. F. O.",
    "finding": "Validated English and German Hexad and mapped scores to specific game elements. Highly significant correlations found. Strongest evidence base for HEXAD-to-mechanic design guidance. Philanthropists: gifting, roles, knowledge sharing. Free Spirits: creativity, exploration. Players: rewards, competition.",
    "tags": [
      "validation",
      "mechanics",
      "crosscultural"
    ],
    "n": ">500 (N=1,073)",
    "flags": [
      "flag-large"
    ],
    "doi": "10.1007/978-3-030-77277-2_18"
  },
  {
    "year": "2021",
    "venue": "UMUAI",
    "title": "Potential and Effects of Personalizing Gameful Fitness Applications Using Behavior Change Intentions and Hexad User Types",
    "authors": "Altmeyer, M., Lessel, P., Jantwal, S., Müller, L., Daiber, F., & Krüger, A.",
    "finding": "HEXAD-based personalisation showed positive effects on user experience measures in fitness context even when behavioural metrics were weak. 16 of 17 expected type-element correlations confirmed.",
    "tags": [
      "health"
    ],
    "n": null,
    "flags": [],
    "doi": "10.1007/s11257-021-09288-6"
  },
  {
    "year": "2021",
    "venue": "AIS THCI",
    "title": "Should Gamification be Personalized? A Self-Deterministic Approach",
    "authors": "Passalacqua, M., Sénécal, S., Frédette, M., Nacke, L. E., Pellerin, R., & Léger, P.-M.",
    "finding": "Personalised gamification outperformed non-personalised gamification on performance outcomes in a warehouse picking task. Practical proof point for HEXAD-based personalisation in enterprise operations.",
    "tags": [
      "enterprise"
    ],
    "n": "N=26",
    "flags": [],
    "doi": "10.17705/1thci.00150"
  },
  {
    "year": "2021",
    "venue": "UMUAI",
    "title": "The Relationship Between User Types and Gamification Designs",
    "authors": "Santos, A. C. G., Oliveira, W., Hamari, J., Joaquim, S., & Isotani, S.",
    "finding": "Hexad orientations related to validated gamification design bundles, but no comprehensive and consistent patterns across all tested designs. Supports directional guidance; argues against rigid one-type-to-one-mechanic rules.",
    "tags": [
      "mechanics",
      "validation"
    ],
    "n": "N=331",
    "flags": [],
    "doi": "10.1007/s11257-021-09300-z"
  },
  {
    "year": "2021",
    "venue": "GamiFIN (CEUR-WS)",
    "title": "Do People's User Types Change Over Time? An Exploratory Study",
    "authors": "Santos, A. C. G., Oliveira, W., Hamari, J., & Isotani, S.",
    "finding": "First longitudinal test of HEXAD stability: 76% of participants changed their dominant user type after six months. All six sub-scale scores also showed meaningful shifts. Directly seeded the later and larger ACM THCI consistency study (Santos et al., 2023) and established the 'dynamic profiling' hypothesis now central to personalisation debates. Fully open access via CEUR-WS.",
    "tags": [
      "temporal"
    ],
    "n": "N=74",
    "flags": [
      "flag-longit"
    ],
    "doi": null,
    "doi_label": "arXiv:2106.10148 | CEUR-WS Vol.2883 pp.90-99"
  },
  {
    "year": "2021",
    "venue": "Online Learning",
    "title": "Examination of the Hexad User Types and Their Relationships with Gender, Game Mode, and Gamification Experience in the Context of Open and Distance Learning",
    "authors": "Şenocak, D., Büyük, K., & Bozkurt, A.",
    "finding": "Examined HEXAD type distribution among distance learners. Philanthropists, Achievers, and Free Spirits were most prevalent; Disruptors least common — consistent with general adult samples. Gender effects on Disruptor scores and associations between game mode preference and user type identified. Provides design guidance for gamified online learning environments.",
    "tags": [
      "education"
    ],
    "n": null,
    "flags": [],
    "doi": "10.24059/olj.v25i4.2276"
  },
  {
    "year": "2022",
    "venue": "Scientific Reports",
    "title": "Psychometric Investigation of the Gamification Hexad User Types Scale in Brazilian Portuguese",
    "authors": "Santos, A. C. G., Oliveira, W., Altmeyer, M., Hamari, J., & Isotani, S.",
    "finding": "Brazilian Portuguese Hexad shows acceptable reliability but item-level issues particularly in Disruptor and Free Spirit subscales. Oblique structure confirmed. Opportunities identified for future improvement.",
    "tags": [
      "crosscultural",
      "validation"
    ],
    "n": "N=421",
    "flags": [],
    "doi": "10.1038/s41598-022-08820-x"
  },
  {
    "year": "2023",
    "venue": "CHI",
    "title": "Hexad-12: Developing and Validating a Short Version of the Gamification User Types Hexad Scale",
    "authors": "Krath, J., Altmeyer, M., Tondello, G. F., & Nacke, L. E.",
    "finding": "12-item version outperforms original on model fit (CFI=.98), convergent and discriminant validity. Resolves psychometric issues found in the Hexad-24. Now the recommended instrument for both research and practitioner use.",
    "tags": [
      "validation"
    ],
    "n": ">500 (N=1,101 CFA)",
    "flags": [
      "flag-large"
    ],
    "doi": "10.1145/3544548.3580968"
  },
  {
    "year": "2023",
    "venue": "ACM THCI",
    "title": "The Consistency of Gamification User Types: A Study on the Change of Preferences Over Time",
    "authors": "Santos, A. C. G., Oliveira, W., Hamari, J., Joaquim, S., & Isotani, S.",
    "finding": "Dominant orientations shift meaningfully over 6 months. \"Strongest tendency is insufficient to characterise change.\" Static personalisation systems become stale. Dynamic profiling and automated orientation assessment are the practical implication.",
    "tags": [
      "temporal"
    ],
    "n": "N=118",
    "flags": [
      "flag-longit"
    ],
    "doi": "10.1145/3611068"
  },
  {
    "year": "2023",
    "venue": "Scientific Reports",
    "title": "Psychometric Investigation of the Gamification Hexad User Types Scale with Brazilian Portuguese Adolescent Speakers",
    "authors": "Santos, A. C. G., Muramatsu, P. K., Oliveira, W., Joaquim, S., Hamari, J., & Isotani, S.",
    "finding": "Assessed the Brazilian Portuguese Hexad scale with adolescents aged 13–16. Results showed the current version needs improvements for this population, especially for the Disruptor user type, and that adolescent correlations between user types were fewer than in adult samples.",
    "tags": [
      "crosscultural",
      "validation",
      "education"
    ],
    "n": "N=110",
    "flags": [],
    "doi": "10.1038/s41598-023-45544-y"
  },
  {
    "year": "2024",
    "venue": "IJHCS",
    "title": "Uncovering the Theoretical Basis of User Types: An Empirical Analysis and Critical Discussion",
    "authors": "Kirchner-Krath, J., Altmeyer, M., Schürmann, L., Kordyaka, B., Morschheuser, B., Klock, A., Nacke, L., Hamari, J., & von Korflesch, H.",
    "finding": "Cross-typology analysis of Bartle, BrainHex, and HEXAD finds overlapping underlying dimensions (Socialization, Achievement, Reward Pursuit, Independence). Argues for continuous motivational measurement over static type assignment.",
    "tags": [
      "validation",
      "mechanics"
    ],
    "n": ">500 (N=877)",
    "flags": [
      "flag-large"
    ],
    "doi": "10.1016/j.ijhcs.2024.103314"
  },
  {
    "year": "2024",
    "venue": "Procedia CS",
    "title": "Enhancing Knowledge Transmission: The Perspective of Gamification User Profiles",
    "authors": "Unternährer, C., Termine, F., & De Santo, A.",
    "finding": "HEXAD profiles correlate with knowledge actions in enterprise: Socialisers/Disruptors more likely to consume and react, Achievers less likely to start quizzes. Managerial role compounds HEXAD profile effects.",
    "tags": [
      "enterprise"
    ],
    "n": "N=130",
    "flags": [],
    "doi": "10.1016/j.procs.2024.06.277"
  },
  {
    "year": "2025",
    "venue": "International Journal of Mental Health and Addiction",
    "title": "Validation of the 12-item Gamification User Types Hexad Scale in 1,610 Hong Kong Young Gamers",
    "authors": "Fong, T. C., Lu, S., Ye, X., Junus, A., & Yip, P. S. F.",
    "finding": "Validated Hexad-12 in a large Hong Kong gamer sample. Found adequate fit for the 12-item version while the original 24-item version fit more poorly. Demonstrated scalar measurement invariance across gender, age groups, and mental distress subgroups. Strengthens the case for Hexad-12 as the preferred instrument in non-Western contexts.",
    "tags": [
      "crosscultural",
      "validation"
    ],
    "n": ">500 (N=1,610)",
    "flags": [
      "flag-large"
    ],
    "doi": "10.1007/s11469-024-01367-0"
  },
  {
    "year": "2026",
    "venue": "CHB Reports",
    "title": "Trophies, Achievements, and Badges: Explaining Differences in Gamification Motivation Using SDT and Hexad Player Type",
    "authors": "Mayrhofer, J., Ameseder, R., Feichtner, R., Baldinger, S., & Weinhandl, R.",
    "finding": "Badge systems carry different motivational meanings by HEXAD profile. Achievers trend toward intrinsic motivation; Players toward extrinsic for trophies/badges. Badge design should differentiate mastery signalling vs reward harvesting.",
    "tags": [
      "mechanics",
      "validation"
    ],
    "n": "N=392",
    "flags": [],
    "doi": "10.1016/j.chbr.2026.100982"
  }
]