Table 4 shows the comparison of the R² and three different AIC values obtained for four different approximations, generated using the results of the sessions completed by all the participants. These R² and AIC values indicate that a power approximation represents the best-fit model for all of the trends, except for the negative trend in ‘All available sessions’ where a linear function seems to have a better fit.

Table 4

Coefficient of determination and AIC values for the different tested models

The shaded boxes indicate the preferred model for a specific model selection criterion.

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