This article examines the experimental approach between humanities and natural sciences that studies humans. It is built on the premise that different disciplines and different experimental techniques may produce similar results when engaging with the same paradigm. The paper uses cognitive psychology and cognitive neuroscience to study a delicate subject such as early competencies in nursing babies. The research required monitoring the emergence of cognitive paradigms, defining its founding concepts, and monitoring the specificities of experimentation for each science, and supporting this by illustrative models. The result was that the use of the same paradigms leads to similar results, even if the disciplines and experimental techniques differ.