children. ? of the infants? >> that's, right that's right. this first finding reports the results after just one year of the unconditional cash gift. and we travel to the families homes and recorded brain activity using a technique called electrons ethnography, or eeg. there are discs called electrodes that look a little bit like microphones, and they enable us to record the electoral brain signals. of course, we are not mind readers, we don't know what children are reading. but we look at how quickly the brain is sending signals. >> and you found a significant difference in the control group and the high cash group? in the brain waves of these children, suggesting there was a causal relationship between this extra $300 a month and some kind of actual, physical brain development? >> that's right. after what we found, of one