Studying cross-cultural differences in temperament in toddlerhood: United States of America (US) and Italy

Cross-cultural differences between matched samples (N = 306) of Italian and US toddlers were evaluated. Italian toddlers received higher scores on cuddliness, impulsivity, low intensity pleasure, perceptual sensitivity and positive anticipation, whereas US toddlers were higher on frustration, high-intensity pleasure, inhibitory control, shyness, and soothability.     

Early infant temperament shapes the nature of mother-infant bonding in the first postpartum year

ObjectiveThis study examined longitudinal relations between maternal bonding and infant temperament in the first nine months after birth.DesignOur sample consisted of 281 women, enrolled at five maternity hospitals, who completed questionnaires during the first week (T1), at six weeks (T2) and nine months postpartum (T3). Maternal bonding was assessed using the Mother-to-Infant Bonding Scale at T1 and T2 and the Postpartum Bonding Questionnaire at T3. Infant temperament was measured using the Infant Characteristics Questionnaire, completed by the mothers at T2 and T3.ResultsThe results of a path model showed a long-term effect flowing from the child to the mother, with infant temperament at T2 predicting maternal bonding at T3 over and above stability in bonding. At T3, bonding was linked more strongly to child temperament at T2 than to child temperament assessed concurrently at T3. Maternal bonding did predict infant temperament, but this was true only of bonding reported at T1 and infant temperament at T2, that is, not of bonding assessed at T2 and infant temperament at T3.ConclusionOur results indicate that maternal bonding in the first week postpartum may temporarily affect child temperament, but infant’s temperament several weeks after birth – rather than several months postpartum – plays a pervasive role in shaping the long-lasting nature of the mother-child relationship. Our findings thus seem to support the suggestion that the early postpartum weeks represent an important period in the development of maternal bonding.     

Maternal postnatal psychiatric symptoms and infant temperament affect early mother-infant bonding

Postnatal mother-infant bonding refers to the early emotional bond between mothers and infants. Although some factors, such as maternal mental health, especially postnatal depression, have been considered in relation to mother-infant bonding, few studies have investigated the role of infant temperament traits in early bonding. In this study, the effects of maternal postnatal depressive and anxiety symptoms and infant temperament traits on mother-infant bonding were examined using both mother and father reports of infant temperament. Data for this study came from the first phase of the FinnBrain Birth Cohort Study (n = 102, father reports n = 62). After controlling for maternal symptoms of depression and anxiety, mother-reported infant positive emotionality, measured by infant smiling was related to better mother-infant bonding. In contrast, infant negative emotionality, measured by infant distress to limitations was related to lower quality of bonding. In regards to father-report infant temperament, only infant distress to limitations (i.e., frustration/anger) was associated with lower quality of mother-infant bonding. These findings underline the importance of infant temperament as one factor contributing to early parent-infant relationships, and counseling parents in understanding and caring for infants with different temperament traits.     

A longitudinal study of temperament continuity through IBQ,TBAQ and CBQ

The aim of this work was to study the continuity of temperament in a Spanish sample (n = 60), covering the developmental stages of infancy, toddlerhood and childhood. Temperamental dimensions showed, with few exceptions, as much homotypic as heterotypic continuity as was to be expected. At the level of latent superconstructs continuity, we found that Anger and Fear followed different developmental paths and showed continuity over all the periods evaluated. Positive Affect/Regulation superconstruct showed continuity from infancy to toddlerhood. From toddlerhood, Positive Affect/Regulation showed continuity with the superconstruct of Effortful Control but not with the superconstruct of Surgency/Extraversion. At an ipsative level, we found two groups of subjects, labeled ‘nonexpressive/controlled’ and ‘noncontrolled/expressive’. Generally, these results confirm the stability of temperament in the periods analyzed and underline the importance of toddlerhood as a transitional period in the maturity of self-regulatory capabilities shown in childhood.     

Prenatal origins of temperament: Fetal cardiac development & infant surgency,negative affectivity,and regulation/orienting

Temperament, i.e. individual differences in reactivity and self-regulation, emerges early in infancy; might temperament originate during fetal development? Mixed findings and methodological issues in the literature examining this consideration limit our understanding of the continuity between these fetal indices and infant temperament. The primary aims of the current study were to improve on published studies by (a) using standardized and well-accepted fetal cardiac (actocardiograph) and infant temperament measures (the Infant Behavior Questionnaire—Revised; IBQ-R) (b) expanding fetal assessments to include coupling (the cross correlation of heart rate with movement), and (c) examining a diverse sample to determine if findings of associations between fetal neurobehavior and infant temperament generalize beyond cohorts that are demographically well-resourced and predominantly white. Building on theory and empirical findings, we hypothesized that (1) FHR would be positively associated with Surgency and Negative Affectivity, (2) FHRV would be positively associated with Surgency, and Regulation/Orienting and inversely associated with Negative Affectivity, and (3) fetal coupling would be positively associated with Regulation/Orienting and Surgency and inversely associated with Negative Affectivity. We collected 20 min of fetal data (m gestational age = 34.42 weeks) and mothers completed the IBQ-R (n = 90 women; 60 % non-Caucasian race; 63 % Latina ethnicity). We found that FHR was positively associated with Negative Affectivity but not associated with Surgency (or Regulation/Orienting). FHRV was inversely associated with Surgency but not associated with Negative Affectivity or Regulation/Orienting. Coupling was positively associated with Regulation/Orienting and Surgency but not associated with Negative Affectivity. Our findings, from a more diverse sample and with established measures, provide further evidence that individual differences in reactivity and regulation can be identified in the in-utero period and show theory-based continuity to specific infant temperament constructs.     

Effects of preterm birth and gender on temperament and behavior in children

The aim of the present study was to assess the direct and interactive effects of premature birth and gender on temperament and behavioral problems in 80 children aged 18–36 months. The sample was composed of children born preterm (PT; n = 44) and children born full-term (FT; n = 36). The children's mothers completed temperament (ECBQ) and behavioral problem (CBCL 1.5–5) assessments. Analyses of variance (ANOVA 2 × 2) were performed. With regard to temperament, PT children exhibited significantly higher scores on high-intensity pleasure and perceptual sensitivity and lower scores on discomfort, cuddliness, and Attentional Focusing compared with FT children. Girls scored higher on fear and discomfort compared with boys. With concern to behavioral problems, PT children scored higher on attention problems compared with FT children. No interactive effect of premature birth and gender on temperament or behavioral problems was found.     

Similarities and differences between western cultures: Toddler temperament and parent-child interactions in the United States (US) and Germany

Parents play a critical role in shaping social-emotional development, particularly in early childhood; however, children’s influence on their own development is equally important. Parent-child interactions, fundamental to secure attachment and social schemes, represent a critical area of social-emotional development subject to child effects associated with temperament. The present study explores these effects through a cross-cultural lens via comparisons of dyads from the United States (US) and Germany. Specifically, cross-cultural differences in toddler temperament were evaluated via the Early Childhood Behavior Questionnaire (ECBQ; Putnam et al., 2006), with cross-cultural variability in parent-child interactions examined as well, along with differences in child temperament effects on the quality of these interactions. Ratings of temperament were generally similar between the two cultures; however, US toddlers were rated higher in attention shifting, whereas German children were rated higher on soothability and perceptual sensitivity. Additionally, dyadic interactions in the US were rated as more stimulating and demonstrating greater partner engagement than those in Germany. Differential contributions of temperament to interaction quality and complexity were also observed. Higher ratings of toddler discomfort and perceptual sensitivity predicted more stimulating interactions overall in the US but not Germany. In contrast, higher ratings of toddler low-intensity pleasure predicted more stimulating interactions in Germany but not the US. Overall, the present study identifies many similarities between US and German toddlers and supports theories describing children as active agents in shaping their own development, in what appears to be a different manner across cultures.     

Maternal alexithymic traits,prenatal stress,and infant temperament

We aimed at investigating, whether maternal alexithymia or prenatal anxiety influences infant temperament (Infant Temperament Questionnaire, IBQ) at six months. Maternal alexithymic trait of “Difficulty in Identifying Feelings” predicted higher infant “Duration of Orienting”. “Fear of Bearing a Handicapped Child” predicted lower infant “Activity Level”.     

Fear and positive affectivity in infancy: convergence/discrepancy between parent-report and laboratory-based indicators

This study examined convergence between indicators of infant temperament derived via parent-report and those obtained in the context of structured laboratory observations. Discrepancies between scores resulting from these methodological approaches were examined in an attempt to explain these differences by considering multiple reporter (i.e., parent) characteristics. Convergence between the two sources of information was hypothesized; however, discrepancies were also expected. This study was aimed at examining whether increased maternal depression and low parenting self-efficacy were related to higher levels of infant fear and decreased positive affectivity, as reported by mothers, relative to the scores derived from the laboratory procedure. Results indicated that the fear scores based on parent-report and structured observations, respectively, were significantly correlated; however, the correlation for smiling and laughter scores did not reach statistical significance. Furthermore, parents higher in negative affect reported a higher level of fear for their infants, relative to the results of the laboratory observation.     

Stability of maternal postnatal bonding between 3 and 6 months: Associations with maternal mental health and infant temperament

Maternal bonding is key for infant development and well-being. Research to date focused on prenatal bonding experience, with fewer studies looking at the postnatal period. Moreover, evidence suggests significant associations among maternal bonding, maternal mental health, and infant temperament. The joint impact of maternal mental health and infant temperament on maternal postnatal bonding remains unclear, with limited research reporting longitudinal data. Hence, the present study aims (1) to explore the impact of maternal mental health and infant temperament on postnatal bonding at both 3 and 6 months of age, (2) to explore postnatal bonding stability from 3 to 6 months, and (3) to determine which factors are linked with 3-to-6-month changes in bonding. At the infants' 3 months (n = 261) and 6 months of age (n = 217), mothers provided measures of bonding, depressive and anxious symptoms, and infant temperament via validated questionnaires. At 3 months, higher levels of maternal bonding were predicted by lower levels of anxiety and depression in the mothers and by higher infants' regulation scores. At 6 months, lower levels of anxiety and depression predicted higher levels of bonding. Moreover, mothers showing decreases in bonding were characterized by 3-to-6-month increases in depression and anxiety, as well as increased reported difficulties in regulation dimensions of infant temperament. This study highlights the impact of both maternal mental health and infant temperament on maternal postnatal bonding in a longitudinal sample and could offer useful information for early childhood prevention and care.     

Early—but modest—gender differences in focal aspects of childhood temperament

The best evidence for gender differences in child temperament is in the broad areas of effortful control and surgency, and to an extent negative affectivity, domains that encompass temperament dimensions of inhibitory control, activity level, and shyness. We examined the influence of child gender in a methodologically comprehensively assessed twin sample. We used mother, father, and Laboratory Temperament Assessment Battery (Lab-TAB) ratings to assess temperament in 3 year-olds. Boys had higher levels of activity level and lower levels of shyness and inhibitory control than girls across all methods of assessment. Then, more rigorous testing showed that patterns of mean gender differences for opposite-sex twin pairs in our sample were very consistent with overall sample gender differences and the magnitude of these gender differences was consistent across assessment methodology. We then asked: are these more gendered dimensions of temperament associated with one another, and are associations different across gender? The answer to both questions is, yes. Shyer children have lower activity level and higher inhibitory control, and those with higher inhibitory control are less active. Gender differences did appear in the intercorrelations between parent ratings of shyness and inhibitory control with only girls showing significant associations within and across these dimensions.     

Cardiac physiological regulation across early infancy: The roles of infant surgency and parental involvement with mothers and fathers

High baseline respiratory sinus arrhythmia (RSA) and infant temperament are associated with a child’s ability to self-regulate, but moderators of this association have not been thoroughly examined in the literature. Parents who are more involved might have more opportunities to interact with and soothe their children. The current study examined whether parental involvement moderated the association between infant temperament and baseline RSA with mothers and fathers across early infancy. Participants included families (n = 91) assessed at 4 and 8 months of age. Infant temperamental surgency and parental involvement were measured via parent-report when infants were 4 months old, and infant baseline RSA was measured at 4 and 8 months of age. Results revealed differences in mother versus father predictors of infant baseline RSA. A significant Infant Surgency X Maternal Play interaction was revealed; infants of mothers who were low involvement increased in their baseline RSA as their surgency increased. A significant main effect of father care was found; infants with highly involved fathers had higher baseline RSA. In conclusion, mothers and fathers may differentially influence their infant’s cardiac physiological regulation based on their specific type of involvement.     

Stress-sensitivity and reciprocal associations between stressful events and adolescent temperament

This study aimed to elucidate the longitudinal, bidirectional associations between stressful life events (SLEs) and adolescent temperament. Subsequently, the study investigated whether the effects of SLEs on future temperament were moderated by (a) a cumulative sensitivity gene index (b) the 5-HTTLPR (the polymorphism most consistently indicated as a sensitivity genotype) and (c) pre/perinatal risk. Data were used from TRAILS, a large population cohort of Dutch adolescents (n = 1475). Temperament was assessed at 11, 16 and 19 years. Data of SLEs that occurred between age 0–11, 11–16, and 16–19 were captured using interviews. The results indicated that SLEs and temperament traits are associated from childhood to adolescence and that the direction of the effects differed between temperament traits. Whereas SLEs were found to predict subsequent fear, SLEs were predicted by, but not predictive of, shyness and affiliation. For effortful control and frustration a fully reciprocal model was found. The cumulative sensitivity gene index, 5-HTTLPR and the pre/perinatal risk did not moderate the effects of SLEs on future temperament.     

The longitudinal associations between temperament and sleep during the first year of life

Temperament and sleep in infants are related but also distinct concepts. The longitudinal effects of temperament on sleep in infancy remain unclear, although this information is potentially important for the prevention and treatment of early sleep problems. We examined how various temperament features influence sleep development during the first year of life in a large birth cohort. This study comprised mother-infant dyads with complete longitudinal data on sleep, temperament and sociodemographic measurements at six and 12 months (N = 1436). We observed that higher infant Negative Affectivity was related to several sleep problems, and that many subscales of Negative Affectivity and Orienting/Regulation predicted worse sleep and deterioration in sleep problems from six to 12 months. Few associations between Surgency and sleep were found. Our findings highlight especially Negative Affectivity as a risk factor for persistent and increasing sleep problems, and also the specific importance of the fine-grained aspects of temperament in predicting infant sleep development.     

Paternal influences on infant temperament: Effects of father internalizing problems,parenting-related stress,and temperament

Temperament ratings were obtained from 98 fathers when their infants were 4 and 6 months of age to examine effects of paternal characteristics on infant temperament. Parental stress, internalizing symptoms, and father's temperament were considered as factors possibly contributing to differences in their child's temperament.     

The association between temperament and depressive symptoms in adolescence: Brooding and reflection as potential mediators

This study examined whether rumination subtypes (brooding and reflection) mediated prospective associations between temperament (negative emotionality and positive emotionality) and depressive symptoms in a community sample of 423 adolescents. Effortful control and sex were examined as potential moderators of the mediated pathway. Youth self-reported negative emotionality (NE), positive emotionality (PE), and effortful control (EC) at age 12; brooding and reflection subtypes of rumination at age 14; and depressive symptoms at ages 12, 14, and 15. Hierarchical linear regression analyses indicated that, controlling for initial levels of depressive symptoms, high NE, but not low PE, predicted increases in depressive symptoms from age 12 to age 15. Brooding, but not reflection, mediated the association between NE and depressive symptoms. Neither sex nor EC moderated either indirect pathway in the mediated model. The results confirm and extend previous findings on the association between affective and cognitive vulnerability factors in predicting depressive symptoms in adolescence.     

Relationships between early behavioural characteristics and temperament at 6 years

The aim of this study was to analyze the extent to which the relations and the stability of the neonatal behaviour and the infant behaviour at both 4 and 12 months could be used to predict the infant temperament at 6 years. Seventy-two full-term, normal-weight, healthy children were followed from 3 days postpartum to 6 years. Neonatal behaviour at 3 and 30 days was assessed using the Neonatal Behaviour Assessment Scale (NBAS), behaviour at 4 and 12 months was assessed using the Infant Behaviour Record (IBR) from the Bayley Scales for Infant Development (BSID) and temperament at 6 years was assessed using the Dimensions of Temperament Survey-Revised (DOTS-R). Negative and positive affectivity and attention were the factors extracted from the behaviours of the IBR. Our results showed a low/moderate correlation between neonatal behaviour on the one hand and behaviour at 4 and 12 months and temperament at 6 years on the other hand. The motor performance, orientation and ANS stability of the neonate at 3 and 30 days were predictors of positive and negative affectivity at 4 months. State regulation and ANS stability at 3 days were predictors of negative affectivity and attention respectively at 12 months. Negative affectivity at 12 months and endurance at 30 days were predictors of general activity and persistence/attention at 6 years. Also, an inverse relation was found between state regulation at 30 days and general activity at 6 years, and a positive relation was found between attention at 4 months and persistence/attention at 6 years. We conclude that neonatal behaviour and behaviour in the first year of life are good predictors of temperament at 6 years and that early negative affectivity has an important role on infant temperament development.     

Relations between child temperament and adolescent negative urgency in a high-risk sample

Negative urgency, rash action during negative mood states, is a strong predictor of risky behavior. However, its developmental antecedents remain largely unstudied. The current study tested whether childhood temperament served as a developmental antecedent to adolescent negative urgency. Participants (N = 239) were from a longitudinal study oversampled for a family history of alcohol use disorder (AUD). Negative emotionality (anger and sadness reactivity) and effortful control were measured in childhood (5–8) and negative urgency in adolescence (13–18). Childhood anger reactivity was uniquely related to later negative urgency above and beyond sadness reactivity. Effortful control was not related to later negative urgency; however, a latent variable capturing the shared variance between childhood effortful control and anger reactivity was related to later negative urgency.     

The genetic and environmental relationship between Cloninger's dimensions of temperament and character

The purpose of this study was to determine whether Cloninger's revised 7-factor model of personality showed incremental validity over his four dimensions of temperament. A sample of 2517 Australian twins aged over 50 between 1993 and 1995 returned completed self-reported measures of Self-directedness, Cooperativeness, and Self-transcendence from Cloninger's Temperament and Character Inventory. Many of these twins had participated in a 1988 study containing Cloninger's temperament measures of Harm Avoidance, Novelty Seeking, Reward Dependence and Persistence. Contrary to theoretical expectations, univariate analyses revealed that familial aggregation for the character dimensions could be entirely explained by additive gene action alone. Although temperament explained 26, 37 and 10% of additive genetic variance in Self-directedness, Cooperativeness and Self-transcendence, respectively, seven genetic factors were required to explain the genetic variance among the TPQ dimensions, and almost all of the non-shared environmental variance was unique to each dimension of character. Our results indicate that the inclusion of all seven dimensions in a taxonomy of personality is warranted.     

Exploring temperamental differences in infants from the USA and the Netherlands

This longitudinal study employed the Infant Behaviour Questionnaire-Revised in assessing temperamental differences between infants at 6 months (n = 114 US, 184 Dutch) and 12 months (n = 92 US, 172 Dutch) from the USA and the Netherlands. Main effects indicated that Dutch infants were rated higher on the Orienting/Regulatory Capacity (ORC) factor and fine-grained dimensions of smiling and laughter, falling reactivity, cuddliness, low-intensity pleasure, and soothability, whereas US infants received higher ratings on the Negative Affectivity factor and on dimensions of activity level, vocal reactivity, fear, frustration, and sadness. Cultural differences for ORC were more pronounced in early infancy, cultural differences for Fear were stronger in late infancy, and US infants demonstrated higher duration of orienting at 12 months only. Culture also appeared to impact the pace of consolidation of temperamental characteristics, with greater stability exhibited by US than Dutch infants in smiling and laughter and vocal reactivity.