Universal Principles of Design, Revised and Updated

1 The seminal work on the baby-face bias is “Ganzheit und Teil in der tierischen und menschlichen Gemeinschaft” [Part and Parcel in Animal and Human Societies] by Konrad Lorenz, Studium Generale, 1950, vol. 3(9).

2 See Reading Faces: Window to the Soul by Leslie A. Zebraowitz, Westview Press, 1998. There are many other factors that could account for this statistic. For example, the level of care and frequency of crying in premature babies is significantly higher than for normal-term babies, which could contribute to the stress of the caregiver.