The use of prompts to instigate "Vygotsky's Inner Speech" helps in the solution of mathematical problems with the use of TICs?

Based on the recent research by "Vygotsky's Inner Speech" Does it help in the solution of mathematical problems with the use of ICTs? (2017) and in the studies of Berk (1994) that present good results regarding the theory of the Inner Speech of Vygotsky and its connection to problem solving, we decided to start this research to encourage the use of private dialogue through the use of 'prompts'. With a methodology similar to Behrend (1992), we observed and recorded 15% of the students from the mathematics course of PUCRS (n = 11) solve two constructional problems in the digital platform GeoGebra. We explained to participants the importance of inner speech and constantly reminded them, via prompts, of this importance. Our analysis has a p-value of 0.0177 (p < 0.05) using Student's T-Test SPSS, as well as sufficient clues to reject our null hypothesis (The use of prompts to instigate the use of "Vygotsky's Inner Speech" does not help solve mathematical problems in ICTs).