Maternal and infant touching behaviours during perturbed interactions: Associations with maternal depressive symptomatology and infant crying

Touch is an important means through which mothers and infants co-regulate during periods of stress or perturbation. The present study examined the synchrony of maternal and infant touching behaviours among 41 mother-infant dyads, some of whom were deemed at-risk due to maternal depressive symptomatology. Mothers and their 4-month-old infants participated in the Still-Face (maternal emotional unavailability; SF) and Separation (maternal physical unavailability; SP) procedures. Infant crying was examined across procedures and investigated as a brief period of perturbation. Results revealed that mothers and infants displayed a positive pattern of tactile synchrony (coordinated, analogous changes in touch) during infant crying episodes. However, dyads in the high depression group displayed significantly less affectionate touch during instances of infant crying. Furthermore, more depressive symptoms were associated with less maternal and infant touch and lower rates of infant crying. This group of dyads may be less expressive via touch, be less affected by disruptions in their interactions, have impaired regulatory abilities, or simply require minimal amounts of touch to mutually regulate following social stressors and during brief perturbation periods. These findings enrich our limited knowledge about the dynamic interplay of maternal and infant touch and inform preventative intervention programs for at-risk groups.     

The effect of mother-infant skin-to-skin contact on Ghanaian infants’ response to the Still Face Task: Comparison between Ghanaian and Canadian mother-infant dyads

The effect of mother-infant skin-to-skin contact on Ghanaian infants’ developing social expectations for maternal behavior was investigated. Infants with high and low mother-infant skin-to-skin contact experience in the infants’ first month engaged with their mothers in a Still Face Task at 6 weeks of age. Infants with high skin-to-skin contact experience, but not those with low skin-to-skin contact experience, demonstrated the still face effect with their smiles. Infants with both high and low skin-to-skin contact experience demonstrated the still face effect with their visual attention. The behaviors of the Ghanaian infants and their mothers during the task were compared to archival evidence of Canadian mother-infant dyads’ behaviors in skin-to-skin and control groups who engaged in the Still Face Task at the infant ages of 1 and 2 months. Similarities and differences between the behaviors of the mother-infant dyads in the two cultures were assessed.     

Early home intervention and socio-emotional development of preterm infants

In the present study, the effects of developmental intervention and parent-infant interaction intervention on the social competence and emotional development of preterm infants were assessed. The results suggest that early home intervention focused on the infant's development facilitates social competence and adaptation, whereas intervention focused on the parent-infant interaction resulted in greater emotional security on the part of the infant. Social competence during the second year of life was predicted by social competence at 8 months and emotional security at 12 and 16 months. These findings have implications for early identification of infants at risk of later socio-emotional difficulties and intervention with dysfunctional mother-infant dyads.     

A comparison of dyadic interactions and coping with still‐face in healthy pre‐term and full‐term infants

Pre‐term birth has a significant impact on infants' social and emotional competence, however, little is known about regulatory processes in pre‐term mother‐infant dyads during normal or stressful interactions. The primary goals of this study were to investigate the differences in infant and caregiver interactive behaviour and dyadic coordination of clinically healthy pre‐term compared to full‐term infant‐mother dyads and to examine pre‐term infants' capacity for coping with stress using the face‐to‐face still‐face paradigm (FFSF). Fifty mother‐infant dyads, including 25 pre‐term infants and 25 full‐term infants were videotaped during the FFSF. All infants were 6–9 months of age (corrected for gestational age in the pre‐term group). Infant and maternal socio‐emotional expressivity and self‐regulatory behaviours were coded and measures of dyadic coordination (Matching, Reparation Rate, and Synchrony) were calculated. There were no significant differences in infant and caregiver socio‐emotional behaviours between the two groups and both groups demonstrated the still‐face (SF) effect and the reunion effect. There was a difference in self‐regulatory behaviour. Pre‐term infants were more likely than full‐term infants to use distancing (e.g., by turning away, twisting, or arching) from their mothers during the FFSF. Additionally, during the Reunion episode of the FFSF pre‐term infants showed more social monitoring compared to full‐term infants. Regardless of the birth status, the dyads showed less coordination and a slower rate of reparation during the Reunion episode than during the Play episode. The higher proportion of distancing in the pre‐term group and the increase in social monitoring suggest that even in normal interactions pre‐term infants may experience a higher level of stress and have less capacity for self‐regulation compared to the full‐terms and that pre‐term infants appear to use a compensatory strategy of increased social monitoring to cope with the stress of renegotiating the interaction during Reunion. The findings suggest that pre‐term infants have different regulatory and interactive capacities than full‐term infants.     

Synchrony in mother-infant vocal interactions revealed through timed event sequences

This report extends a previous cross-cultural study of synchrony in mother-infant vocal interactions (Bornstein et al., 2015) to immigrant samples. Immigrant dyads from three cultures of origin (Japan, South Korea, South America) living in the same culture of destination (the United States) were compared to nonmigrant dyads in those same cultures of origin and to nonmigrant European American dyads living in the same culture of destination (the United States). This article highlights an underutilized analysis to assess synchrony in mother-infant interaction and extends cross-cultural research on mother-infant vocal interaction. Timing of onsets and offsets of maternal speech to infants and infant nondistress vocalizations were coded separately from 50-min recorded naturalistic observations of mothers and infants. Odds ratios were computed to analyze synchrony in mother-infant vocal interactions. Synchrony was analyzed in three ways -- contingency of timed event sequences, mean differences in contingency by acculturation level and within dyads, and coordination of responsiveness within dyads. Immigrant mothers were contingently responsive to their infants’ vocalizations, but only Korean immigrant infants were contingently responsive to their mothers’ vocalizations. For the Japanese and South American comparisons, immigrant mothers were more contingently responsive than their infants (but not robustly so for South American immigrants). For the Korean comparison, mean differences in contingent responsiveness were found among acculturation groups (culture of origin, immigrant, culture of destination), but not between mothers and infants. Immigrant dyads’ mean levels of responsiveness did not differ. Immigrant mothers’ and infants’ levels of responsiveness were coordinated. Strengths and flexibility of the timed event sequential analytic approach to assessing synchrony in mother-infant interactions are discussed, particularly for culturally diverse samples.     

Responsiveness in mother-infant social interactions among immigrant and nonmigrant families: Japanese,South Korean,South American,and European American

A culture learning perspective motivated the present study of the acculturation of responsiveness in mother-infant interactions. Several conceptual and analytic features of responsiveness in mother-infant social interactions were examined: Temporal contingency, mean differences in responsiveness among and within dyads, attunement of mother and infant responsiveness withing dyads, and the influence of acculturation on individual responsiveness. Methodologically, acculturation was assessed at group and individual levels in immigrant Japanese, South Korean, and South American dyads in comparison with nonmigrant dyads in their respective cultures of origin (Japan, South Korea, and South America) and their single common culture of destination (United States). In total, 408 mothers and their 5½-month-old infants were observed in the naturalistic setting of the home, and observations were coded for mothers’ speech to infant, social play, and encouraging her infant to look at her, and infants’ looking at mother and nondistress vocalizations. Odds ratios were then generated for mother and infant responsiveness in four types of social interactions: Mother speaks to infant and infant looks at mother (Mother Speak/Infant Attend), mother plays with infant and infant looks at mother (Mother Play/Infant Attend), mother plays with infant and infant vocalizes (Mother Play/Infant Vocalize), and mother encourages infant to look at her and infant vocalizes (Mother Encourage/Infant Vocalize). Five key findings emerged. Specifically, mother and infant responsiveness in Mother Speak/Infant Attend interactions were temporally contingent in all cultures. Mean differences in responsiveness among cultures emerged, and within dyads infants were more responsive than their mothers in Mother Speak/Infant Attend interactions. Mother and infant responsiveness in Mother Speak/Infant Attend interactions were attuned in all cultures. Responsiveness in Mother Play/Infant Vocalize interactions showed acculturation effects at the individual level. Implications of these findings for understanding the development of responsiveness in social interactions and acculturation in immigrant families are discussed.     

Mother-infant interactions in western Lowland Gorillas (Gorilla gorilla gorilla): spatial relationships,communication, and opportunities for social learning

This study investigated mother-infant interactions in lowland gorillas (Gorilla gorilla gorilla) with particular focus on the relative role of mothers and infants in creating situations that are potentially conducive to infant social learning. Eleven gorilla mother-infant dyads were focally observed in weekly 1-hr sessions for 12 months. Spatial relationships were affected by age as well as by ambient temperature. Although the youngest infant was encouraged by its mother to walk and climb, mothers showed little or no encouragement in other contexts. In contrast, infants were quite interested in their mothers' activities, on some occasions repeated their mother's behavior, and actively encouraged their mothers to share food, play, or follow them. These findings suggest that gorilla infants are more active than their mothers in creating situations that are potentially conducive to the acquisition of knowledge or skills.     

Parent-Training with Kangaroo Care Impacts Infant Neurophysiological Development & Mother-Infant Neuroendocrine Activity

A randomized control trial was conducted to investigate the effects of skin-to-skin, chest-to-chest contact (kangaroo care, KC) in mother-infant dyads on patterns of infant brain activity and associated mother-infant neurohormone releases. 33 mother-infant dyads participated during pregnancy (29–38 weeks gestation), at neonatal and 3-month periods. Overall, analyses indicated that: 1) infants in the KC group showed left frontal brain activation patterns (asymmetry and coherence) associated with KC training; 2) KC produced moderate to large increases in oxytocin levels; and 3) KC yielded moderate decreases in cortisol reactivity. Findings suggest KC may garner favorable neuro-maturational and neurobiological outcomes for dyads.     

Teenage parenting in different cultures,family constellations,and caregiving environments: Effects on infant development

Teenage parenting was investigated in different ethnic groups (Cuban and American Black), family constellations (single-parent, nuclear, and extended families), and primary caregiving arrangements (mother versus other). One hundred sixty-four infants born to a representative sample of teenage mothers were observed during interactions with their mothers and were given developmental assessments when they were 12, 18, and 24 months of age. Being a Cuban mother, living in a nuclear family, and being a secondary caregiver were each associated independently with stronger social support systems and more positive child-rearing attitudes and mother-infant play interactions. Despite these early advantages, maternal stimulation and infant performance decreased over the second year of life irrespective of ethnic group, family constellation, and caregiving arrangements.     

Caregiver‐mediated joint attention intervention

Joint attention is a pivotal social communication skill often absent or impaired in young children with autism spectrum disorder. Joint attention is the shared and alternating attention of two individuals on an object or event, and has implications for later communication and social communication skills. This study used a concurrent multiple‐baseline design across 3 caregiver–child dyads to train caregivers to teach response to joint attention behaviors to their 3–6 years old children with moderate to severe autism spectrum disorder. Caregivers were trained on strategies including prompting, time delay, and elements of naturalistic teaching and implemented the intervention in brief 10‐min sessions 2–3 times per week. Results indicate parent mastery of intervention and substantial increase in child response to joint attention behaviors both prompted and independent. Implications for practice and areas for future research are discussed.     

Coregulation in mother-infant dyads: links to infants' cardiac vagal tone

This investigation explored links between mother-infant coregulated communication patterns and infants' emerging parasympathetic regulatory processes (cardiac vagal tone). Participants included 56 first-time mothers and their 6-mo.-old infants (31 girls, 25 boys). A 4-min. baseline EKG was gathered from the infant and an ensuing 15-min. mother-infant dyadic free-play episode was videotaped and coded using Fogel's 1994 Regional Coding System. This system was developed to describe variations in coregulated features of communication among dyads, ranging from symmetrical patterns to disruptive patterns of coregulation. Analysis suggests a positive link between infants' cardiac vagal tone and more symmetrical features of coregulated communication patterns in mother-infant dyads. Cardiac vagal tone was also negatively correlated with unilateral features of coregulation communication systems. These findings point toward the potential relation between emerging physiological regulatory abilities of infants and the more relational regulatory processes in mother-infant dyads.     

The role of oxytocin in early mother-infant interactions: Variations in maternal affect attunement

The aim of the present research was to investigate the relationship between oxytocin and maternal affect attunement, as well as the role of affect attunement in the relationship between oxytocin and infant social engagement during early mother-infant interactions. Forty-three mother-infant dyads participated in the present study when infants were 4 months. They were observed during (1) a situation where no communication took place and (2) a natural interaction between mother and infant. During this procedure, three saliva samples from mothers and their infants were collected to determine their levels of oxytocin at different time points. Maternal affect attunement (maintaining attention, warm sensitivity) and infant interactive behaviors (gaze, positive, and negative affect) were coded during the natural interaction. Results indicated that overall maternal oxytocin functioning was negatively related to her warm sensitivity, while infant oxytocin reactivity together with maternal affect attunement were associated with infant positive social engagement with their mothers. Specifically, infant oxytocin reactivity was significantly related to their gazes at mother, but only for infants of highly attuned mothers. These results point to the complex role oxytocin plays in parent-infant interactions while emphasizing the need to analyze both overall oxytocin functioning as well as reactivity as different indices of human affiliative behavior.     

Attention-getting vs. imitation effects on depressed mother-infant interactions

The effects of instructing mothers to “imitate” their infant versus “keep their infant's atten tion” were examined during mother-infant face-to-face interactions of 18 mothers reporting depressive symptoms as compared with 22 mothers who did not report such symptoms. Mothers were generally rated as showing more positive facial expressions and more game playing (particularly the depressed mothers) during the attention-getting versus the imitation sessions. The infants received more optimal physical ac tivity, and facial expression ratings during attention getting, and the infants of depressed mothers, in par ticular, showed more positive facial expressivity and more joy expressions. As might be expected for the imitation condition, mothers showed more imitative behavior, contingent responsivity, and silence during gaze aversion. Infants generally showed more disinterest and self-comfort behaviors, and the infants of depressed mothers, in particular, showed more anger expressions, fussiness, and squirming during the imitation condition. The data suggest that the attention-getting condition was the most effective “intervention” for eliciting positive behavior in the depressed mother-infant dyads.     

Number and type of toys affect joint attention of mothers and infants

Establishing joint attention with a caregiver on a physical object provides an optimal environment for language learning for infants. In the present study, we investigated whether 12-month-olds and their mothers establish higher quality joint attention interactions in the presence of fewer compared to more toys. As a secondary goal, we investigated how different types of toys affect how mother-infant dyads establish joint attention. In a five-minute free play setting, mothers and infants participated in either Five Toy (n = 48) or Twelve Toy (n = 33) groups. They were given organizational (i.e., toys that require arrangement of parts), responsive (i.e., toys that emit sounds via manipulation), and symbolic toys (i.e., toys that elicit pretend play). Results showed that compared to the Twelve Toy group, joint attention interactions in the Five Toy group were less frequent, lasted longer, were more likely to be initiated by maternal following than by maternal directing of infants’ attention, and more likely to be coordinated in which infants demonstrated awareness of the mothers’ simultaneous attentional focus by looking at their mothers, vocalizing, or turn-taking. We further found longer joint attention durations on organizational compared to symbolic toys, which were preferred to a lesser extent by the dyads. With responsive toys, mothers were more likely to initiate joint attention by following their infants’ attention. Joint attention interactions lasted longer and were more likely to be coordinated in the second half compared to the first half of the play session, suggesting that over time it became easier for the mothers and infants to settle on certain toys for more elaborate play. In sum, mothers and infants establish higher-quality joint attention with fewer toys in general and with organizational toys in particular.     

Chronic stress in the mother-infant dyad: Maternal hair cortisol,infant salivary cortisol and interactional synchrony

Stress physiology is shaped by early experience, with enduring effects on health. The relation of chronic maternal physiological stress, as indexed by hair cortisol, to infants’ stress systems and to mother-infant interaction quality has not been established. We examined maternal hair and salivary cortisol, six-month-old infants’ salivary cortisol, and mother-infant interaction in 121 mother-infant dyads. High maternal hair cortisol was related to higher infant average salivary cortisol concentration. Maternal hair cortisol and bedtime salivary cortisol were both uniquely related to infant bedtime salivary cortisol. Mothers with higher hair cortisol were more intrusive and had lower positive engagement synchrony with their infants. Maternal intrusiveness moderated the association of maternal hair cortisol and infant salivary cortisol, such that maternal hair and infant average salivary cortisol were related only when mothers were more intrusive. Maternal chronic physiological stress may upregulate infants’ developing stress systems, particularly in the context of lower mother-infant interaction quality.     

WHEN INFANTS GROW UP IN MULTIPERSON RELATIONSHIP SYSTEMS

Despite prompts from the field of family therapy since its inception, contemporary infant mental health theory and practice remain firmly rooted in and guided by dyadic-based models. Over the past 10 years, a groundswell of new empirical studies of triadic and family group dynamics during infancy have substantiated that which family theory has contended for decades: looking beyond mother-infant or father-infant dyads reveals a myriad of critically important socialization influences and dynamics that are missed altogether when relying on informant reports or dyad-based interactions. Such family-level dynamics emerge within months after infants are born, show coherence through time, and influence the social and emotional adjustment of children as early as the toddler and preschool years. This report summarizes key findings from the past decade of empirical family studies, highlights several areas in need of further conceptual development and empirical study by those who work with infants and their families, and outlines important implications of this body of work for all practicing infant mental health professionals.     

Vocal imitation between mothers and infants

The aim of the present mixed cross-sectional and longitudinal study was to observe and describe some aspects of vocal imitation in natural mother-infant interaction. Specifically, maternal imitation of infant utterances was observed in relation to the imitative modeling, mirrored equivalence, and social guided learning models of infant speech development. Nine mother-infant dyads were audio-video recorded. Infants were recruited at different ages between 6 and 11 months and followed for 3 months, providing a quasi-longitudinal series of data from 6 through 14 months of age. It was observed that maternal imitation was more frequent than infant imitation even though vocal imitation was a rare maternal response. Importantly, mothers used a range of contingent and noncontingent vocal responses in interaction with their infants. Mothers responded to three-quarters of their infant's vocalizations, including speech-like and less mature vocalization types. The infants’ phonetic repertoire expanded with age. Overall, the findings are most consistent with the social guided learning approach. Infants rarely imitated their mothers, suggests a creative self-motivated learning mechanism that requires further investigation.     

Intervention for infants with brain injury: results of a randomized controlled study

A randomized clinical trail (RCT) employed a 12-month individualized cognitive/sensorimotor stimulation program to look at the efficacy of the intervention on 62 infants with suspected brain injury. The control group infants received the State-funded follow-up program provided by the Los Angeles (LA) Regional Centers while the intervention group received intensive stimulation using the Curriculum and Monitoring System (CAMS) taught by public health nurses (PHNs). The developmental assessments and outcome measures were performed at 6, 12 and 18 months corrected age and included the Bayley motor and mental development, the Home, mother-infant interaction (Nursing Child Assessment Feeding Scale (NCAFS) and Nursing Child Assessment Teaching Scale (NCATS)), parental stress and social support. At 18 months, 43 infants remained in the study. The results indicate that the intervention had minimal positive effects on the Bayley mental and motor development scores of infants in the intervention group. Likewise, the intervention did not contribute to less stress or better mother-infant interaction at 12 or 18 months although there were significant differences in the NCAFS scores favoring the intervention group at 6 months. There was a significant trend, however, for the control group to have a significant decrease over time on the Bayley mental scores. Although the sample was not large and attrition was at 31%, this study provides further support to the minimal effects of stimulation and home intervention for infants with brain injury and who may have more significant factors contributing to their developmental outcome.     

9-24月龄婴儿母亲敏感性的预防性干预实验

本研究根据依恋理论和相关的干预研究成果编制了母亲敏感性干预手册,并对9-24月龄要儿的母亲实施了预防性干预.有16对母婴对分别进行了家庭录像观察.其中10位母亲作为培训组参加为期两个月的干预,干预目标集中于提高母亲敏感性,并提高母亲与婴儿的互动行为水平.另外6位母亲为对照组.三个月后,干预完成并再次对培训组和对照组进行家庭观察.用AinSwonh母亲敏感性量表和母亲行为Q分类方法分别对两次家庭观察录像进行编码分析.结果表明:培训组在信号敏感、可得、阻碍和接纳四个方面都有改善;该干预模式有效提高了母亲的敏感性.同时,该干预对母婴互动行为水平也略有提高.在文章中讨论了存在的问题和今后的研究方向.     

Associations between mother-infant bed-sharing practices and infant affect and behavior during the still-face paradigm

Parents in the United States increasingly report bed-sharing with their infants (i.e., sleeping on a shared sleep surface), but the relationship between bed-sharing and child socioemotional outcomes are not well understood. The current study examines the links between mother-infant bed-sharing at 3 months and infant affect and behavior during a dyadic challenge task at 6 months. Further, we examine nighttime mother-infant contact at 3 months as a possible mechanism that may mediate linkages between bed-sharing and infant outcomes. Using observational data from a sample of 63 mother-infant dyads, we found that infants who bed-shared for any proportion of the observation period at 3 months displayed significantly more self-regulatory behaviors during the still-face episode of the Still-Face Paradigm (SFP) at 6 months, compared to non-bed-sharing infants. Also, infants of mothers who bed-shared for the entire observation period displayed significantly less negativity during the reunion episode than non-bed-sharing infants. There was no evidence that the relations between mother-infant bed-sharing practices and infant affect and behavior during the SFP were mediated through nighttime mother-infant contact. Results suggest that infant regulation at 6 months postpartum may vary based on early nighttime experiences, with bed-sharing potentially promoting more positive and well-regulated behavior during dyadic interaction.