The early crying paradox : A modest proposal

Area of Science:

• Developmental Psychology
• Infant Behavior
• Cross-Cultural Studies

Background:

• Infant crying in the first three months is common in Western societies.
• While essential for bonding and nutrition, excessive crying (colic) can lead to negative outcomes like discontinued breastfeeding and child abuse.
• A paradox exists between the adaptive functions of infant crying and its potential negative consequences.

Purpose of the Study:

• To propose a resolution to the infant crying paradox.
• To investigate the role of caregiving practices in shaping infant crying patterns.
• To differentiate the impact of caregiving on crying bout length versus frequency.

Main Methods:

• Review of evidence on caregiving determinants of early crying.
• Comparative analysis of crying patterns in Western versus non-Western societies.
• Hypothesizing the influence of caregiving on infant physiological functions related to crying.

Main Results:

• Caregiving practices significantly affect the duration, not frequency, of infant crying bouts.
• Prolonged crying bouts are characteristic of Western caregiving contexts.
• Non-Western caregiving practices and potentially ancestral methods likely involve shorter crying bouts.

Conclusions:

• Infant crying bout length is modifiable by caregiving, particularly in Western contexts.
• Frequent, short crying bouts are sufficient for adaptive functions like nutrition and bonding.
• Shorter crying bouts may be evolutionarily advantageous, enhancing infant fitness.