[ragestorm]

If my Spanish translator is correct, roughly a little over half of the n=150ish participants developed at a slower rate.

[nostrademons]

Isn't that roughly what you would expect anyway? 50% of the population is below the median. Take a separate population and measure them against the overall median, and simply through statistical chance, a good number of those samples will have an average slower than the median.

[doublemint2203]

over half developed in a statistically significant way that is lower than the expected "bottom half"