According to the story. Newborns were transported to the study site at an old castle, and were cared for by wet nurses instructed to put the infants to the breast as often as the infants needed, but in no instance to speak to the infants. Frederico's hypothesis was that if no one spoke to the infants, that then would eventually talk the one pure human tongue, but his experiment failed. Unfortunately, as a result of this experiment, all of the infants died. A loving, caring relationship with a caretaker is an obligatory part of infant development.
Modern linguists continue to search for the origins of language.
Gastric emptying was assessed with a marker dilution method. Most term infants had an increase in the number of duodenal contractions in response to their first feeding. In contrast, most premature infants had a decrease in the number of contractions after their first feeding. The more mature the infant, the more likely to be an increase in motility following a feeding. Increased duodenal motility was associated with faster gastric emptying.