What to do and what to avoid on the use of gamified intelligent tutor system for low-income students. - Sivaldo Joaquim; Ig Ibert Bittencourt; Rafael de Amorim Silva; Patrícia Leone Espinheira; Marcelo Reis (Educ. Inf. Technol., 2022)

Investigating how gamified syllabic literacy impacts learning, flow and inappropriate behaviors: A single-subject study design. - Danielle Akemi Jogo; Geiser Chalco Challco; Ig Ibert Bittencourt; Marcelo Reis; Laíza Ribeiro Silva; Seiji Isotani (Int. J. Child Comput. Interact., 2022)

The Good and Bad of Stereotype Threats: Understanding Its Effects on Negative Thinking and Learning Performance in Gamified Tutoring. - Jessica Fernanda Silva Barbosa; Geiser Chalco Challco; Francys Rafael Do Nascimento Martins; Breno Felix de Sousa; Ig Ibert Bittencourt; Marcelo Reis; Jário José Santos; Seiji Isotani (AIED (Posters/Late Breaking Results/...), 2023)

Gamiflow: Towards a Flow Theory-Based Gamification Framework for Learning Scenarios. - Geiser Chalco Challco; Ig Ibert Bittencourt; Marcelo Reis; Jário José Santos; Seiji Isotani (AIED (Posters/Late Breaking Results/...), 2023)

Even Boosting Stereotypes Increase the Gender Gap in Gamified Tutoring Systems: An Analysis of Self-efficacy, Flow and Learning. - Maria Takeshita; Geiser Chalco Challco; Marcelo Reis; Jário José Santos; Seiji Isotani; Ig Ibert Bittencourt (AIED (Posters/Late Breaking Results/...), 2023)

Unhappiness and Demotivation Among Students in Gamified Tutoring Systems: Toward Understanding the Gender Gap. - Kamila Benevides; Jário José Santos; Geiser Chalco Challco; Marcelo Reis; Alvaro Sobrinho; Leonardo Brandão Marques; Diego Dermeval; Rafael Ferreira Leite de Mello; Alan Silva; Seiji Isotani; Ig Ibert Bittencourt (AIED Companion (2), 2024)

Breaking the Cycle: AI Boosting Communication Skills of Low-Income Students in Brazil. - Renata Miranda de Gama; Geiser Chalco Challco; Jário José Santos; Marcelo Reis; Alvaro Sobrinho; Seiji Isotani; Ig Ibert Bittencourt (AIED Companion (1), 2024)

Exploring the Impact of Gender Stereotypes on Motivation, Flow State, and Learning Performance in a Gamified Tutoring System. - Kelly Silva; Jário José Santos; Geiser Chalco Challco; Marcelo Reis; Leonardo Brandão Marques; Alan Silva; Alvaro Sobrinho; Diego Dermeval; Rafael Ferreira Leite de Mello; Ig Ibert Bittencourt; Seiji Isotani (AIED Companion (2), 2024)

Flow Experience, Performance Expectation and Performance: An LGBTQ+ Diversity Perspective on Gamified Systems. - Breno Felix de Sousa; Geiser Chalco Challco; Marcelo Reis; Jessica Fernanda Silva Barbosa; Francys Rafael Do Nascimento Martins; Seiji Isotani; Ig Ibert Bittencourt Santa Pinto (Revista Brasileira de Informática na Educ., 2025)

How does the Mechanics of Competition and Collaboration Impact on Student's Flow Experience in a Gamified Educational Environment? An Experimental Study in Higher Education (under review). - Alexandre Marinho; Ig Ibert Bittencourt; Diego Dermeval; Jário José Santos; Geiser Chalco Challco; Marcelo Reis (Technol. Knowl. Learn., 2025)