Infant Behavior Research Articles

Associations between Social Contact, Sleep and Dietary Patterns among Children: A Cross-Sectional Study.

Social isolation in adults can be associated with altered sleep and eating behavior. This study aimed to investigate the interactions between the extent of social contact, eating behavior and sleep in infants and preschool children. In an observational study, 439 caregivers of 562 children aged 0-6 years provided information on sleep (i.e., duration, latency, bedtimes and nighttime awakenings), eating behaviors (i.e., meal size, consumption of sweet snacks, salty snacks, fruits and vegetables) and social contact (i.e., quarantine status, household size, social activities) during the COVID-19 pandemic (April 2020). In infants (0-3 years), the change in meal size and consumption of snacks, fruits, and vegetables did not significantly relate to the extent of social contact. For preschool children (3-6 years), a trend was observed, suggesting that quarantine status was associated with increased meal size. Changes in sleep duration, sleep latency, bedtimes and nighttime awakenings from before to during the pandemic were not significantly linked to the three variables quantifying social contact in both age groups. This study highlights that, contrary to expectations, the extent of social contact has negligible associations with infants' and preschool children's sleep and eating behaviors. These findings indicate that other factors beyond social isolation play a role in shaping children's eating habits and sleep patterns.

A preliminary investigation of epigenome-wide DNA methylation and temperament during infancy.

This study provides preliminary evidence for an epigenetic architecture of infant temperament. At 12 months of age, blood was collected and assayed for DNA methylation and maternally reported infant temperament was assessed using the Infant Behavior Questionnaire in 67 mother-infant dyads. Epigenome-wide analyses showed that the higher order temperament dimensions Surgency and Negative Affect were associated with DNA methylation. The epigenetic signatures of Surgency and Negative Affect were situated at genes involved in synaptic signaling and plasticity. Although replication is required, these results are consistent with a biologically based model of temperament, create new avenues for hypothesis-driven research into epigenetic pathways that underlie individual differences in temperament, and demonstrate that infant temperament has a widespread epigenetic signature in the methylome.

Translanguaging practices in infant rooms: case studies of Chinese-Australian bilingual infant-educator interactions

ABSTRACT Many bilingual infants attend early childhood education centres (ECEC) with their monolingual peers. However, recent evidence reveals that bilingual infants vocalise significantly less than monolingual infants in ECEC settings (Zheng et al. 2023) [Effects of Multilingualism on Australian Infants’ Language Environments in Early Childhood Education Centers. Infant Behavior and Development, 70, 101799.], suggesting that educators may need to provide language tailored strategies to support bilingual infants’ language learning. This study examines how educators support Mandarin-English bilingual infants’ learning and development through a range of translanguaging practices in Australian ECEC contexts. We identified three functions of fluid translanguaging pedagogies: (1) make meaning and acknowledge children’s bilingual repertoires during play-based interactions; (2) introduce the connections between two languages during literacy and play activities; (3) provide emotional support or regulate behaviour through the use of home language. We also identified educators’ language-supporting strategies such as repetition, expanding their own/child’s utterances, labelling and questioning during translanguaging practices. This study is the first to closely describe the dynamic nature of translanguaging interactions between early childhood educators and Mandarin-English bilingual children under the age of two. Findings highlight the importance of translanguaging for scaffolding infants’ bilingual language learning, fostering their bilingual identities and supporting their wellbeing.

Mother-infant postnatal experience and its association with maternal emotion and coping during the COVID-19 pandemic

ABSTRACT Introduction The COVID-19 pandemic resulted in a partial lockdown in Malaysia known as Movement-Controlled-Order (MCO), which has affected primary care management and social life norms. Thus, psychological health is a concern for mothers, particularly during the postpartum period. This study aimed to determine factors associated with maternal emotional experiences and coping during the pandemic. Methodology Mothers of infants aged < 18 months (n = 1449) in Malaysia completed an online survey during MCO (July 2020 to February 2021). The survey comprised questions on sociodemographics, pandemic livelihood impact, maternal experiences, and emotions. Results More than one-third of mothers expressed feeling worried (54.7%), annoyed (48.1%), and tired (42.2%) to some or a high extent. Mothers who were younger (p = .001), more educated (p = .001), faced difficulty paying rent (p = .002), and whose husbands were unemployed (p < .001) expressed higher negative emotions. In contrast, mothers who received enough support for health (p = .001) and breastfeeding (p = .008), had infants sleep less (p = .042) and had more time to focus on health (p < .001) expressed better emotions. Higher coping was expressed among mothers with a higher household income (p = .004), had more time to focus on their health (p = .010), received additional breastfeeding support (p = 0.039), and practised traditional postpartum care (p < .001). In contrast, difficulty paying for essentials (p = .023) was associated with negative coping. Conclusion Maternal emotional experiences were significantly associated with sociodemographic characteristics, livelihood impact, postnatal experiences, and infant behaviours. Postpartum mental health screening is recommended to prevent severe distress, especially in first-time mothers. Coping interventions for mothers at risk may include comprehensive support and maternity care.

Continuity and discontinuity in infant and maternal behavior from 3 to 9 months according to prematurity status.

Continuity and discontinuity in infant and maternal behavior from 3 to 9 months according to prematurity status.

Consumption of Iron Supplements, based on the Structures of the Health Belief Model, in Children Aged 6 to 24 Months in the Southeast of Iran

Objective: Iron deficiency is one of the common problems during infancy. The purpose of this study is to investigate the status of iron supplement consumption and the factors affecting it based on the constructs of the health belief model. Methodology: In this descriptive study, 402 mothers of children aged 6-12 months were selected using multi-stage random sampling. The status of mothers' performance regarding the provision of iron supplements and the status of health belief model constructs were evaluated using a questionnaire whose validity and reliability have been confirmed. The data were analyzed using analysis of variance, Pearson correlation coefficient and linear regression tests. Results: the present study showed that despite the state of proper awareness, the score of Consumption of iron supplements behavior was not favorable. So that 62.7% had reported a low performance. Pearson correlation test showed that only the perceived susceptibility score did not show significant relationship with the behavior (p = 0.174) The regression results showed that the variables included in the regression model, explained a total of 24.1% of the variance of the change in the behavior score (Adjusted R2 = 0.241). Conclusion: Considering the unfavorable situation of iron supplementation behavior in infants, the use of health belief theory constructs can be effective in persuading mothers. Community health nurses can be more successful in improving this index by providing educational intervention based on the structures of this model, especially helping to remove the barriers perceived by mothers.

Antecedents of maternal pregnancy-related anxiety trajectories: The FinnBrain birth cohort study.

Little is known about the normative courses of pregnancy-related anxiety throughout pregnancy and their antecedents. We examined in a large scale pregnancy cohort which potentially distinct trajectories of pregnancy-related anxiety across pregnancy can be identified, and which factors predict these trajectories. A general sample of pregnant women (n = 2928) from the FinnBrain Birth Cohort participated in this study. Several questionnaires were filled in at 14, 24, and 34 weeks of gestation, including the pregnancy-related anxiety questionnaire-revised as main outcome. Latent Growth Mixture Modeling was applied to identify the trajectories of pregnancy-related anxiety across pregnancy, and t-tests and chi-quare tests were conducted to find antecedents of these trajectories. Two distinct trajectories were identified: (1) a low symptoms group, N = 2594 (88.6%), with lower and slightly increasing levels of pregnancy-related anxiety (2) a moderately-high symptoms group, N = 334 (11.4%) reported higher and slightly decreasing levels of anxiety. Correlates of the moderately-high anxious group included a lower monthly income, drinking alcohol or smoking in early pregnancy, more daily hassles and less joy, more early life adversities, younger age, primiparity, single parenthood, using depression medication, and having higher scores on depression and general anxiety. Although the majority of pregnant women fall within a low risk trajectory of pregnancy-related anxiety, another group with consistently higher levels of pregnancy anxiety throughout pregnancy may need more clinical attention, as their high pregnancy-related anxiety scores may indicate a risk profile that includes a variety of general and more pregnancy-specific risk factors, which together can negatively affect fetal and infant development and behavior.

Leveraging nursery and early childhood education institutions for improving feeding and movement behaviours of infants and young children in China.

Leveraging nursery and early childhood education institutions for improving feeding and movement behaviours of infants and young children in China.

Challenging Case: A Multidisciplinary Approach to Demystifying Chronic Sleep Impairment in an Infant with a Complex Medical and Behavioral Profile.

Challenging Case: A Multidisciplinary Approach to Demystifying Chronic Sleep Impairment in an Infant with a Complex Medical and Behavioral Profile.

Association of the Infant Gut Microbiome with Temperament at Nine Months of Age: A Michigan Cohort Study.

Though studies in animals and humans link the gut microbiota to brain development and control of behavior, little research has examined this connection in healthy infants. This prospective study could determine associations between infant gut microbiota at 3 months, and infant temperament at 9 months, in a prospective pregnancy cohort (Michigan Archive for Research on Child Health; n = 159). Microbiota profiling with 16S rRNA gene sequencing was conducted on fecal samples obtained at 3 months of age. Based on the relative abundance of gut microbiotas, three groups were identified, and each group was characterized by different microbes. Infant temperament outcomes were reported by mothers using the Infant Behavior Questionnaire-Revised Very Short Form at a mean age of 9.4 months. Fully adjusted multivariate linear regression models showed that certain clusters were associated with higher negative emotionality scores, prominently among infants who had poor vitamin D intake. However, no associations were evident between gut microbiota clusters and temperament scales after FDR correction. After using three differential abundance tools, Firmicutes was associated with higher positive affect/surgency scores, whereas Clostridioides was associated with lower scores. An association between the gut microbiota and early infancy temperament was observed; thus, this study warrants replication, with a particular focus on vitamin D moderation.

Attachment and mother-infant interactions in dyads with infants born full-term, moderate-to-late preterm, and very-to-extreme preterm

BackgroundThe impact of prematurity status on attachment quality remains indeterminate. Some studies found no differences between infants born preterm (PT) and infants born full-term (FT), while other investigations present opposite results. AimsWe aim to contribute to this body of research by studying mother-infant interactive behaviors and quality of attachment in 3 independent samples: Full-Term (FT), Moderate-to-Late Preterm (MLPT) and Very-to-Extreme Preterm (VEPT). Study designThis is a longitudinal laboratory study conducted from 3 to 12 months of age (corrected-age in the case of infants born PT). SubjectsThe participants are 213 Portuguese infants (FT = 105; MLPT = 52; VEPT = 56) and their mothers. Outcome measuresMother-infant interactive behavior was observed in free-play at 3 and 9 months (corrected-age). Infant attachment was observed in Strange Situation at 12 months. ResultsSecure attachment is more prevalent in infants born FT, and ambivalent attachment is more prevalent in infants born VEPT. Infants with a secure attachment have higher gestational age and weight at birth. Infant and maternal interactive behavior quality is associated with attachment patterns and varies according to infant prematurity status. Last, the results indicate changes in maternal sensitivity and infant difficult behavior from 3 to 9 months of infant's age. ConclusionsOur findings indicate that prematurity status impacts attachment quality. Changes in maternal and infant behavior from 3 to 9 months suggest a period of rapid non-linear development, supporting a transactional multilayered approach to the study of mother-infant relationship.

Mother-infant self- and interactive contingency at four months and infant cognition at one year: A view from microanalysis

Although a considerable literature documents associations between early mother-infant interaction and cognitive outcomes in the first years of life, few studies examine the contributions of contingently coordinated mother-infant interaction to infant cognitive development. This study examined associations between the temporal dynamics of the contingent coordination of mother-infant face-to-face interaction at 4 months and cognitive performance on the Bayley Scales of Infant Development at age one year in a sample of (N = 100) Latina mother-infant pairs. Split-screen videotaped interactions were coded on a one second time base for the communication modalities of infant and mother gaze and facial affect, infant vocal affect, and mother touch. Multi-level time-series models evaluated self- and interactive contingent processes in these modalities and revealed 4-month patterns of interaction associated with higher one-year cognitive performance, not identified in prior studies. Infant and mother self-contingency, the moment-to-moment probability that the individual’s prior behavior predicts the individual’s future behavior, was the most robust measure associated with infant cognitive performance. Self-contingency findings showed that more varying infant behavior was optimal for higher infant cognitive performance, namely, greater modulation of negative affect; more stable maternal behavior was optimal for higher infant cognitive performance, namely, greater likelihood of sustaining positive facial affect. Although interactive contingency findings were sparse, they showed that, when mothers looked away, or dampened their faces to interest or mild negative facial affect, infants with higher 12-month cognitive performance were less likely to show negative vocal affect. We suggest that infant ability to modulate negative affect, and maternal ability to sustain positive affect, may be mutually reinforcing, together creating a dyadic climate that is associated with more optimal infant cognitive development.

Experience of discrimination reported during pregnancy and infant's emerging effortful control.

Discrimination reported during pregnancy is associated with poorer offspring emotional outcomes. Links with effortful control have yet to be examined. This study investigated whether pregnant individuals' reports of lifetime racial/ethnic discrimination and everyday discrimination (including but not specific to race/ethnicity) reported during pregnancy were associated with offspring emerging effortful control at 6months of age. Pregnant individuals (N=174) and their offspring (93 female infants) participated. During pregnancy, participants completed two discrimination measures: (1) lifetime experience of racial/ethnic discrimination, and (2) everyday discrimination (not specific to race/ethnicity). Parents completed the Infant Behavior Questionnaire-Revised when infants were 6months old to assess orienting/regulation, a measure of emerging effortful control. Analyses were conducted in a subsample with racially/ethnically marginalized participants and then everyday discrimination analyses were repeated in the full sample. For racially/ethnically marginalized participants, greater everyday discrimination (β=-.27, p=.01) but not greater lifetime experience of racial/ethnic discrimination (β=-.21, p=.06) was associated with poorer infant emerging effortful control. In the full sample, greater everyday discrimination was associated with poorer infant emerging effortful control (β=-.24, p=.002). Greater perceived stress, but not depressive symptoms, at 2months postnatal mediated the association between everyday discrimination and emerging effortful control. Further research should examine additional biological and behavioral mechanisms by which discrimination reported during pregnancy may affect offspring emerging effortful control.

The roles of sensory hyperreactivity and hyporeactivity in understanding infant fearfulness and emerging autistic traits.

Existing evidence indicates that atypical sensory reactivity is a core characteristic of autism, and has been linked to both anxiety (and its putative infant precursor of fearfulness) and repetitive behaviours. However, most work has used cross-sectional designs and not considered the differential roles of hyperreactivity and hyporeactivity to sensory inputs, and is thus limited in specificity. 161 infants with and without an elevated likelihood of developing autism and attention-deficit hyperactivity disorder (ADHD) were followed from 10 to 36 months of age. Parents rated an infant precursor of later anxiety (fearfulness) using the Infant Behaviour Questionnaire at 10 and 14 months, and the Early Childhood Behavioural Questionnaire at 24 months, and sensory hyperreactivity and hyporeactivity at 10, 14 and 24 months using the Infant Toddler Sensory Profile. Domains of autistic traits (restrictive and repetitive behaviours; RRB, and social communication interaction, SCI) were assessed using the parent-rated Social Responsiveness Scale at 36 months. Cross-lagged models tested (a) paths between fearfulness and hyperreactivity at 10-24 months, and from fearfulness and hyperreactivity to later autism traits, (b) the specificity of hyperreactivity effects by including hyporeactivity as a correlated predictor. Hyperreactivity at 14 months was positively associated with fearfulness at 24 months, and hyperreactivity at 24 months was positively associated with SCI and RRB at 36 months. When hyporeactivity was included in the model, paths between hyperreactivity and fearfulness remained, but paths between hyperreactivity and autistic traits became nonsignificant. Our findings indicate that alterations in early sensory reactivity may increase the likelihood of showing fearfulness in infancy, and relate to later social interactions and repetitive behaviours, particularly in individuals with a family history of autism or ADHD.

Natural-ish behavior: The interplay of culture and context in shaping motor behavior in infancy.

What is natural behavior and how does it differ from laboratory-based behavior? The "natural" in natural behavior implies the everyday, complex, ever-changing, yet predictable environment in which children grow up. "Behavior" is motor action and is foundational to psychology, as it includes all things to function in everyday environments. Is behavior demonstrated in the laboratory un-natural? Suppose behavior emerges spontaneously, in a context that is most common to the animal but an observer is there to document it using particular research tools. Is that behavior natural or natural-ish? Methods can powerfully affect conclusions about infant experiences and learning. In the lab, tasks are typically narrowly constrained where infants and children have little opportunity to display the variety of behaviors in their repertoire. Data from naturalistic observations may paint a very different picture of learning and development from those based on structured tasks, exposing striking variability in the environment and behavior and new relations between the organism and its environment. Using motor development as a model system, in this chapter we compare frameworks, methods, and findings originating in the lab and in the field, applied and adapted in different settings. Specifically, we recount our journey of pursuing the study of cultural influences on motor development in Tajikistan, and the challenges, surprises, and lessons learned.

Examining infantile facial features and their influence on caretaking behaviors in free-ranging Japanese macaques (Macaca fuscata).

Facial features of immature individuals play a pivotal role in eliciting caretaking behaviors in humans. It has been posited that non-human animals share particular infantile facial features with humans, which can elicit caregivers' attention and caretaking behaviors. Nevertheless, the empirical examination of this hypothesis is extremely limited. In this study, we investigated infantile facial features in Japanese macaques (Macaca fuscata), their developmental processes, and their correlation with caretaking and infant behaviors, based on 470 facial photographs from one free-ranging group. We measured the size of facial parts and evaluated these features using non-contact procedures with the animals. The results indicated that, although some partial species differences were observed, the infantile facial features in Japanese macaques were broadly consistent with those previously observed in humans and great apes. Furthermore, half of the infant subjects displayed non-linear developmental trajectories of infantile faces, similar to those suggested in humans. However, unlike previous studies in humans, infantile faces were not significantly associated with maternal or non-maternal caretaking behaviors, nor were their developmental changes correlated with infant behavioral development. These findings indicate that while many aspects of infantile facial features are shared among particular primates, humans may have evolved a uniquely elevated preference for selecting such features among the primate lineage.

Swiss cohort on Traumatic Childbirth and Health (SwiTCH): protocol for a prospective, population-based cohort study on parents’ mental health from pregnancy to one year postpartum

IntroductionApproximately 4%–5% of mothers develop childbirth-related post-traumatic stress disorder (CB-PTSD) and approximately 12.3% of mothers develop some CB-PTSD symptoms (CB-PTSS). To date, there is a dearth of studies on fathers...

Prenatal iodine intake and infant temperament in a multiethnic US cohort.

Maternal iodine plays a central role in fetal neurodevelopment. It is recommended that pregnant women consume sufficient levels of iodine to accommodate increased need for mother and fetus. We examined associations among prenatal dietary and supplemental iodine intake and infant temperament. The PRogramming of Intergenerational Stress Mechanisms (PRISM) study is an ongoing longitudinal pregnancy cohort. Data from 2011 to 2020 were used for this study. Women completed the Block98 FFQ ascertaining prenatal dietary and supplemental iodine intake and the Infant Behavior Questionnaire-Revised at infant age 6 months to ascertain infant temperament (Surgency/Extraversion, Negative Affectivity and Orienting/Regulation). USA. Mother-child dyads (n 892). Women were primarily Black/Hispanic Black (44 %) and non-Black Hispanic (35 %) with 46 % reporting household income < $25 000/year. Nearly half had an estimated average requirement (EAR) < 160 µg/d (49 % based on dietary intake; 43 % based on diet and supplements). Girls born to women with an EAR ≥ 160 µg/d compared to girls born to women below this level had higher unadjusted extraversion scores for dietary plus supplemental intake (β = 0·23 (0·13, 0·33)); decreased to β = 0·05 (-0·08, 0·19) after adjusting for covariates. Boys born to women with an EAR ≥ 160 µg/d (based on diet and supplements) as compared to boys born to women below this level had statistically non-significant higher unadjusted negative affective score (β = 0·06 (-0·08, 0·20)) that became significantly lower upon covariate adjustment (β = -1·66 (-1·97, -1·35)). A significant proportion of these women reported suboptimal prenatal iodine intake. Suboptimal prenatal iodine intake may have implications for child neurodevelopment evident as early as infancy.

Family Influences on Anorexic Refusal Behavior in Infants

In this study, an 18-month-old with apparent anorexic refusal behavior was used as a subject, and observations were recorded while the subject was eating to speculate on the reasons for the emergence of refusal behavior in the baby. The results indicated that the baby's anorexic behavior was greatly influenced in part by the feeder's inappropriate feeding concepts and feeding practices. In this regard, this study analyzed the impact of feeder behaviors on the development of eating habits in infant and made feasible recommendations for improvement.

Сравнительный анализ подходов Л.С. Выготского и Дж. Боулби к развитию ребенка на первом году жизни

&lt;p&gt;Objective: To compare the positions of L.S. Vygotsky and J. Bowlby regarding three critical aspects of mental development of a child: the characteristics of newborn perception, the extent of an infant's engagement in early social interaction, and the psychological nature of the bond between an infant and its mother. Method: a comparative analysis. Results. The authors' viewpoints share common ground in acknowledging the child's immediate engagement in social relationships following birth and the pivotal role of a primary caregiver figure in the child's development. Nevertheless, disparities in the interpretation of &amp;ldquo;primordial we" and "attachment" concepts, employed by the authors to elucidate the specifics of the child's connection with the mother or a caregiver, are explored. The study reveals a divergence between L.S. Vygotsky's postulate of infant helplessness, forming the foundation of the developmental social context at this stage, and J. Bowlby's perspective, emphasizing the presence of highly effective inborn forms of social perception and behavior in infants. Conclusions. These disparities in the authors' viewpoints may be attributed to their reliance on different research paradigms, with one emphasizing culture-centred approach and the other adopting an evolution-centred approach. L.S. Vygotsky's assertion about infant helplessness, though lacking empirical validation, maintains its theoretical importance as a direction in the search for the unique course of human development. Keywords: cultural-historical theory, attachment theory, newborn, childhood, infancy.&lt;/p&gt;