Crying Behaviour and its Impact on Psychosocial Child Development
Cynthia A. Stifter, PhD, Penina Backer, BS, MA
Pennsylvania State University, USA
All infants cry and all cry for a reason. Indeed, the attributions applied to early infant crying range from pain to anger to boredom.1 In the first months of life, crying is particularly salient as infants have relatively few effective methods of communicating their needs and states. Developmentally, crying in early infancy is distinguished by its temporal qualities. Several studies have demonstrated that infants typically show an increase in their crying across the first three months, with a peak at around 6 to 8 weeks of age.2 Importantly, crying decreases significantly around 3 to 4 months of age, coinciding with important developmental changes in affect, non-negative vocalizations and motor behaviour. As crying is considered a normal communicative signal,3 developmental outcomes for children who cry within the normal range are not of concern. However, some infants exceed the typical pattern of crying, such as those who cry long, hard and inconsolably during the first three months or those who cry/fuss frequently beyond 3 to 4 months of age. It is these infants who are often believed to be “at risk” for developmental problems.
Unexplained, excessive or persistent crying in the first three months of life that occurs in an otherwise healthy infant is labelled “infant colic.”4 Colic can be found in approximately 10% of the population. The causes of colic are quite diverse and can be categorized as residing either in the infant or the parent-infant dyad. Only 5 to 10% of infants who cry excessively, however, are believed to suffer from some organic disease.5 A recent set of papers reviewing the evidence on the source of infant colic concluded that those infants who present with excessive crying and other symptoms of ill-health such as failure to thrive, vomiting, and diarrhea should be distinguished from infant colic and treated accordingly.6 For healthy infants, however, there is a growing consensus among researchers that infant colic is a developmental phenomenon involving individual differences in reactivity and regulatory function.7,8
Shorter bouts of crying and fussiness that are more frequent and persist beyond 3 months of age are believed to be temperamentally based. Infants who possess these caracteristics are termed either difficult, irritable, or negatively reactive. Temperament describes constitutionally-based and heritable individual differences in reactivity and regulation.9 Although temperament can be modified, it is considerably stable across the life span.10-13 And, because high negative reactivity represents an extreme case, it has been found to demonstrate significant continuity.14
The intense crying and inconsolability of an excessively crying or fussy infant creates a host of parental reactions and concerns about the behavioural development of the infant. Because negatively reactive temperament is relatively stable, it is proposed to have implications for more adverse, persistent outcomes than the transitory condition of colic. Nevertheless, this does not preclude colic’s effect on the family environment nor its long-term outcome.
Key Research Question
Whether infants cry intensely for a few months or fuss frequently for the first year of life, a systems approach to development would suggest that the impact of extremes in crying on the infants’ immediate environment may have negative consequences for the dynamics of the parent-child relationship, which in turn would have implications for the child’s psychosocial development. Thus, researchers have asked: Is the effect of early infant crying on later development direct, or is it indirect through interactions with the child’s early social partners?
Outcomes for infant colic. Longitudinal observations and parent ratings show that infants with colic may continue to be more negatively reactive shortly after the colic has resolved;15-19 however, long-term assessments of their temperament have revealed few differences.15-20 Interestingly, this early difference in reactivity may be due to a delay in the development of regulatory strategies.17 Most longitudinal research report few long-term effects of infant colic. In two studies, mothers reported more negative emotional behaviour in their preschool-aged children who formerly had colic, although there were no differences in all other reported behaviour problems when compared to infants who did not have colic.20,21 Finally, several studies have also examined mental development in infants with colic and likewise have demonstrated no effect of colic.15,16,20,22 In one study, although differences on the Bayley MDI were revealed at six months, both groups were within the normal range, and no differences were found at 12 months of age.23
As might be expected, the impact of infant colic is felt more by the parents, particularly mothers who have the burden of caring for the excessively crying child. Mothers reported more symptoms of psychological distress24,25 and low self-efficacy.26,27 And, although mothers report more depressive symptoms at the time their infants are experiencing colic,28,29 research on maternal depression 3 months after the remittance of infant colic is mixed.30,31 The distress mothers of colic infants report may arise out of their difficulties in soothing their infants as well as within their everyday dyadic interactions.32 The few studies to date that have examined the long-term consequences of having a colicky child, however, indicate that there are no negative outcomes for parent behaviour and, importantly, for the parent-child relationship. In two separate studies,15,16 mothers of colic and non-colic infants were observed to be alike in maternal sensitivity shortly after the colic resolved. These results may explain why infant who developed colic were on the parent‑child relationship have been found. Infants who developed colic were no more likely to be insecurely attached than infants who did not have colic.26
Outcomes for negatively reactive temperament. As with the research on the developmental effects of infants with colic, findings with regard to negatively reactive temperament and persistent crying (excessive crying that persists beyond the colic period) suggest that it influences more than the infant. The psychosocial outcome receiving the most attention from researchers is problem behaviour, with most studies finding perceived negative reactivity in infancy to predict problem behaviour in childhood33,34 and adolescent.35 Specifically, infants prone to high levels of fear, frustration, and sadness, as well as difficulty recovering from such distress, were found to be at increased risk for internalizing and externalizing problem behaviours according to parental and/or teacher report. Two things are important to note about these findings: (1) not every negatively reactive infant expressed behavioural problems later in life; and (2) both temperament and problem behaviours were, in most studies, rated by parents, raising the issue of respondent bias.
Research has also shown that infant negative reactivity may have immediate and long-term effects on parenting. Concurrent associations have been found between parents-reported infant negative emotionality and negative parenting, but only in studies of low socioeconomic status or minority families.36 This pattern of findings suggests that, within the context of sociodemographic risk, negatively reactive infants may tax parental capacity for appropriate responsiveness to infant needs. Longitudinal findings highlight the bidirectional nature of such processes. In one study, observed infant negativity predicted declines in supportive parenting by toddlerhood, while harsh parenting during infancy predicted increased toddler negativity.37 Similarly, another study found that maternal relationship stress was associated with concurrent infant negativity, which predicted slower emotion regulatory development across infancy, which in turn predicted negative parenting in toddlerhood.38
The interactive effect of infant temperament and parent behaviour on child development has been explained by the "differential susceptibility model,"39,40 which proposes that highly reactive infants are more sensitive than their peers to both negative and positive environmental influences. In support of this model, multiple studies have shown the association between infant negative reactivity and later psychosocial outcomes such as problem behaviour and self-regulation to be moderated by parental behaviour, so that highly reactive children fare better than others when they experience optimal parenting but worse than others when they experience negative parenting.41-46 Further support is found in studies indicating that interventions targeting parental attitudes and/or behaviours are particularly effective for children with a history of negative reactive temperament.47,49
Conclusions and Implications
Aside from clear and diagnosable medical conditions, parents’ primary complaint to clinicians during the infancy period is that of excessive fussing and crying, generally that which cannot be soothed or tolerated. There are, however, important distinctions to be made about crying in infancy: (a) Crying in early infancy increases over the first two months of life and then decreases thereafter. Thus, excessive crying may be mis-attributed if the developmental course of crying is not understood; (b) Crying in excess of the normative rate during the first three months of life is categorized as colic. Colic is a transient condition that ends around the third to fourth month of an infant’s life and appears to have few consequences for the child; (c) Crying and/or frequent fussing is a characteristic of negatively reactive temperament but can be distinguished from colic in several ways; colic is not a stable phenomenon and it manifests itself as intense crying bouts of long duration, whereas negative reactivity is stable and characterized by frequent bouts of fussiness. Finally, because of the persistence of negative reactivity for some infants more adverse outcomes are likely, particularly if the parental environment is non-supportive. It appears that this form of temperament may tax parents, leading to stressful interactions and negative perceptions. At the extreme, crying may lead to child maltreatment and/or shaken baby syndrome.50,51 Clinicians receiving complaints of excessive crying and fussing in infants should be aware of these distinctions and use appropriate measures to validate parental assessments.
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How to cite this article:
Stifter CA, Backer P. Crying Behaviour and its Impact on Psychosocial Child Development. In: Tremblay RE, Boivin M, Peters RDeV, eds. Encyclopedia on Early Childhood Development [online]. http://www.child-encyclopedia.com/crying-behaviour/according-experts/crying-behaviour-and-its-impact-psychosocial-child-development. Updated March 2017. Accessed September 19, 2019.