Multisensory Activities and School Naps to Break Mirror Invariance for Letters in Literacy: Adapting a Protocol for the Classroom
literacy; mirror invariance; sleep; nap;
Full literacy achieved at the appropriate age remains a challenge in Brazil, where only 53% of second-grade students were fully literate. Experimental evidence suggests that multisensory interventions and sleep-dependent learning processes may support early reading acquisition; however, their translation to real-world school settings is still poorly understood. This dissertation investigates the adaptation and classroom implementation of a protocol originally developed for individual intervention, assessing its effects under ecologically valid conditions. The study was conducted with first-grade classes from six full-time public state schools in Rio Grande do Norte, Brazil, allocated to intervention and control groups. The intervention group engaged in multisensory activities in the morning followed by a post-lunch nap over a three-week period, while the control group maintained the regular school routine. Reading and writing skills were assessed at three time points: pre-intervention, immediate post-test, and at the end of the school year. The findings did not replicate the effects reported in the original protocol; however, the lessons learned during the adaptation process constitute valuable evidence for Implementation Science. These findings highlight the need to account for contextual, logistical, and pedagogical factors in the design of evidence-based interventions. Future studies should investigate adjustments in the format, duration, and curricular integration of the protocol, as well as large-scale implementation strategies that preserve its underlying mechanisms across diverse school contexts.