Can you really improve your intelligence? Promising results from this remarkable study suggest 'maybe' could be the answer. Some analysis below:https://www.researchgate.net/publication/324384285_Modulating_fluid_intelligence_performance_through_combined_cognitive_training_and_brain_stimulation …
I mean pre/post. If you can't show MI in the same person pre/post, then the intervention gains weren't on the latent factor you're going around claiming they were on but something narrower and less specific and suspiciously artifactual (like, say, from passive controls).