How New Knowledge About Parenting Reveals the Neurobiological Implications of Intersubjectivity: A Conceptual Synthesis of Recent Research

Observations of early mother–infant interactions have shown that intersubjectivity is a primary motivation and have underscored the importance of maternal competencies in this development. In our paper we propose a conceptual overview of the different perspectives according to which parental caregiving has been formulated. Psychoanalytical theory has fundamentally promoted the exploration of maternal and paternal intrapsychic constellation, by stressing the role of unconscious processes in parental attitude as well as in infant development. In contrast with psychoanalytical theory, the conceptual framework of attachment has mostly considered real interactions between parents and infant, underlining parental abilities in providing the infant with a secure base. Finally, infant research has explored the complexity of communicative system between parents and infants, which appears already active from the birth of the baby. Recently, these different viewpoints have been broadened by neurobiological research, which has begun to explore maternal brain functioning and structure, by means of new scientific instruments such as fMRI techniques. From these perspectives, we provide an overview of motherhood, underlining both neurobiological and psychological transformations, which begin from pregnancy and run through the first year of the infant, when the mother–infant intersubjective matrix is built. This matrix influences the construction of the infant's Self and support the development of the sense of “we,” a sort of connective net, which ties the baby to parents, letting him feel as a part of the familiar world.     

A Piagetian approach to infant referential behaviors

Near the end of the first year of life, infants begin producing referential behaviors that in adults indicate joint attention, or coordinating shared attention to an object with another person. These behaviors have been interpreted in the social cognitive literature as an indication that infants realize they are sharing attention to an object with another person. In this paper, we address theory and research on infant referential behaviors described as joint attention and offer an alternative explanation for the presence of these behaviors. Using Piaget's constructivist theory, we show how research in this area can be interpreted without assuming that infants have advanced social cognitive abilities. We argue that infants’ referential behaviors are motor signifiers of thought and that infants recognize humans as particularly relevant objects for their goal-directed behaviors. Finally, we describe how the field of infant joint attention research should proceed if a comprehensive understanding of infant cognitive processes is to be desired.     

The influence of prematurity,maternal anxiety,and infants' neurobiological risk on mother–infant interactions

In this study, we investigated how the birth of a very low birth weight preterm (VLBW) infant influences the mother–infant interaction at 3 months. We also focused on the impact of the infant's neurobiological risk and maternal anxiety, and their interaction. The comparison of the VLBW preterm sample (n = 79) with an external full‐term sample (n = 35) showed mother–infant interactions of the families with the preterm infant to be more vocally responsive during the interaction, but less facially responsive during the interaction. Additionally, higher levels of maternal anxiety were associated with preterm infants being less facially responsive in interaction with their mother. While neurobiological risk of the infant played a part in this association, with higher risk infants also being less facially responsive, the relationship with maternal anxiety and the mother–child interaction was stronger. How these findings may influence therapeutic interventions is discussed.     

Effects of maternal inattentiveness on infant social referencing

The aim of the study was to clarify the meaning of infant looking behaviour when the infant is confronted with an ambiguous situation in order to disentangle the two processes social referencing and attachment. Ninety‐six 12‐month‐olds, presented with an ambiguous or an unambiguous toy, were assigned to one of four conditions; mother inattentive, mother conveyed positive information, and mother conveyed negative information about the ambiguous toy. In the fourth condition (control condition), an unambiguous toy was presented (mother inattentive). The ambiguous situation elicited more referencing looks than the unambiguous situation. During the presentation of the ambiguous toy, infants with inattentive mothers referenced the experimenter more than infants whose mothers provided guidance. In the following free‐play situation, infants in the inattentive group referenced mother to a higher degree than did the other infants. They played less with the toy than infants who had received positive information and infants in the control group, and were less eager to explore the surroundings than infants in the other three groups. When mother turned attentive the infants ceased referencing her and showed an interest in exploring. Copyright © 2003 John Wiley & Sons, Ltd.     

Gender and infant psychiatry

The practice of infant psychiatry raises theoretical and clinical issues for the feminist psychotherapist. The psychological and social development of infants, the mother-child relationship, and the role of fathers are all areas of shared concern for infant psychiatry and a feminist project. This paper argues that attention to gender as a fundamental category of analysis is crucial in order to understand the context of infant development, to develop a realistic theory of mothering that avoids both mother blaming and the idealization of mothers, and to illuminate the political content of our approaches to therapeutic intervention and research.     

Development of infant crying behavior: A longitudinal case study

This study documents the development of infant crying behavior during the second half of the first year (across a key developmental transition). Two female infants were observed twice a month for 6 months when the infants were between 7 and 14 months of age. The infants exhibited crying behavior that seemed to become more sophisticated with increasing age. This marked a proactive stance in communicating with the mother on the part of the infant. Interestingly, at 11–12 months, “fake crying” was observed during a naturalistic interaction with the mother. This implied that deceptive infant behavior could be seen at quite an early stage.     

Simulation-based research to improve infant health outcomes: Using the infant simulator to prevent infant shaking

Simulation is a technique that creates a situation or environment to allow persons to experience a representation of a real event for the purpose of practice, learning, evaluation, testing, or to gain understanding of systems or human actions. We will first provide an introduction to simulation in healthcare and describe the two types of simulation-based research (SBR) in the pediatric population. We will then provide an overview of the use of SBR to improve health outcomes for infants in health care settings and to improve parent-child interactions using the infant simulator. Finally, we will discuss previous and future research using simulation to reduce morbidity and mortality from abusive head trauma, the most common cause of traumatic death in infancy.     

Maternal sensitivity and infant response to frustration: The moderating role of EEG asymmetry

Two hundred and thirty-three 5-month-old infants and their mothers participated in a study designed to examine the influence of maternal sensitivity and infant neurophysiology, as well as interactions between these, on infants’ regulatory behavior and reactivity to emotional challenge. Maternal sensitivity was measured during two mother–child free-play episodes prior to the challenge task. Infant neurophysiology was derived from a measure of resting EEG asymmetry collected during a baseline episode. Infant regulatory behaviors (mother orienting and distraction) and reactivity to challenge (negative affect) were assessed during an arm restraint procedure. Maternal sensitivity predicted mother-orienting behavior for all infants, regardless of baseline EEG asymmetry. Maternal sensitivity also predicted more distraction behaviors for infants with left frontal EEG asymmetry at baseline. In contrast, maternal sensitivity predicted more negative affect for infants with right frontal EEG asymmetry at baseline. These findings lend support for the hypothesis that maternal sensitivity and infant neurophysiological functioning interact to predict regulatory behavior and reactivity and are discussed in terms of the significance for understanding infant regulatory development in the first year of life.     

Development of face recognition in infant chimpanzees (Pan troglodytes)

In this paper, we assessed the developmental changes in face recognition by three infant chimpanzees aged 1–18 weeks, using preferential-looking procedures that measured the infants’ eye- and head-tracking of moving stimuli. In Experiment 1, we prepared photographs of the mother of each infant and an “average” chimpanzee face using computer-graphics technology. Prior to 4 weeks of age, the infants showed few tracking responses and no differential responses. Between 4 and 8 weeks of age, they paid greater attention to their mother's face. From 8 weeks onward, they again showed no differences, but exhibited frequent tracking responses. Experiment 2 investigated the infants’ tracking responses between a familiar human's and an “average” human face. The infants did not show any evidence of recognizing the human faces. We discuss the development of face recognition in relation to the effects of other species’ faces and postnatal visual experience.     

Evaluating a home‐based dyadic intervention: Changes in postpartum depression,maternal perceptions,and mother–infant interactions

Psychotherapeutic treatments that focus on improving the relational processes between mothers with postpartum depression (PPD) and their infants, as well as the mother's individual therapeutic needs, have a great potential to positively impact the mother, her infant, and their relationship (K.J. Nylen, T.E. Moran, C.L. Franklin, & M. O'Hara, 2006 ). Utilizing pilot data from an evaluation of a home‐based dyadic therapy for mothers with PPD and their infants, this article reports on a recent academic–community partnership study. The effectiveness of the intervention was examined, specifically regarding changes in mother's mood, parenting experience, and relationship with her infant. In addition, associations were examined among maternal self‐report variables measuring change from pre‐ to posttreatment in PPD, psychological distress, and maternal perceptions of parenting and those variables measuring change in observer ratings of maternal–infant interactions. Results showed improvements in mothers' depression, distress, and perceptions of parenting as well as many ratings of mothers' interactions with their infants. However, only improvements in maternal perceptions of parenting, such as maternal self‐esteem and parenting stress, were associated with better mother–‐infant interactions. Importance of this research for the field of infant mental health as well as clinical implications are discussed.     

Self-organizing systems and infant motor development

A dynamical systems approach is used to characterize early motor development. Contemporary theories of motor performance emphasize the self-organizing and autonomous properties of muscle synergies as an example of the dynamical behavior of complex, nonlinear systems. The organization of leg movements in infants is consistent with the dynamical approach. Using this perspective, we view skill development as a multidimensional, emergent phenomenon. The developmental principles derived from motor behavior may apply to other domains.     

The European school of MCDA: Emergence,basic features and current works

Multiple-criteria decision analysis has evolved considerably since its birth during the 1960s. As part of this evolution, several schools of thought have developed emphasizing different techniques and, more generally, different attitudes as to the way of supporting or aiding decision making. One of these schools is now commonly referred to as the ‘European School’, its members being part of a European Working Group entitled ‘Multicriteria Aid for Decisions’. In the first part of this paper (Section 1) we follow a historical perspective in order to trace the emergence of the European School. Its distinctive features and main ideas are then outlined in Section 2. Finally we provide a general review of the current major research topics developed within this framework (Section 3).     

Parental decision-making: infant engagement with smartphones

Smartphones have become a ubiquitous part of life, and as a result, many children are engaging with smartphones beginning in infancy. Little is known regarding the thought processes used by parents in deciding when and how to allow their infants to engage with smartphones. Using a sample of twelve parents with infants younger than one year, this qualitative study examines parental smartphone use, their perspectives regarding use by their young children, and what sources informed their decision-making about allowing their infants to use a smartphone. Results found that the smartphone has become such a common part of everyday life that choices to use a smartphone around, and with, infants has become one that is nearly automatic. These research data showed that most parents are largely unaware of guidelines for childhood screen time provided by the American Academy of Pediatrics and the World Health Organization. Given our current knowledge that smartphone use can have a significant impact on the cognitive development of young children, this topic is an important area of future research.     

Influences of maternal postpartum depression on fathers and on father–infant interaction

Maternal postpartum depression (PPD) has been shown to negatively influence mother–infant interaction; however, little research has explored how fathers and father–infant interaction are affected when a mother is depressed. This study examined the influence of maternal PPD on fathers and identified maternal and paternal factors associated with father–infant interaction in families with depressed as compared with nondepressed mothers. A convenience sample of 128 mother–father–infant triads, approximately half of which included women with significant symptoms of PPD at screening, were recruited from a screening sample of 790 postpartum women. Mothers and fathers completed measures of depression, marital satisfaction, and parenting stress at 2 to 3 months' postpartum and were each videotaped interacting with their infants. Results indicate that maternal PPD is associated with increased paternal depression and higher paternal parenting stress. Partners of depressed women demonstrated less optimal interaction with their infants, indicating that fathers do not compensate for the negative effects of maternal depression on the child. Although mother–infant interaction did not influence father–infant interaction, how the mother felt about her relationship with the infant did, even more so than maternal depression. The links between maternal PPD, fathers, and father–infant interaction indicate a need for further understanding of the reciprocal influences between mothers, fathers, and infants.     

A feeding scale for research and clinical practice to assess mother—infant interactions in the first three years of life

The Feeding Scale provides a reliable rating of mother-infant/toddler interactions during a 20-minute feeding in a laboratory setting. The scale consists of 46 mother and infant behaviors, which are rated at the end of the feeding session. Observations of mother—infant interactions during two feedings separated by 2 weeks showed considerable stability. Five subscale scores are derived (1) Dyadic Reciprocity, (2) Dyadic Conflict, (3) Talk and Distraction, (4) Struggle for Control, and (5) Maternal Non-Contingency, Predictive validity of the Feeding Scale has been demonstrated and it discriminates between infants with and without feeding disorders as well as three diagnostic categories of feeding-disordered infants. The Feeding Scale can be used with infants and toddlers ranging in age from 1 month to 3 years. © 1997 Michigan Association for Infant Mental Health     

Experimental manipulation of maternal proximity during short sequences of sleep and infant calming response

This study aimed to understand how different mother-infant sleeping arrangements impact infants’ self-regulation, particularly their calming response. Thus this study investigated the effect of three prevalent mother-infant sleeping arrangements, co-sleeping (CS), sleeping beyond arm’s length from their mother (BAL), and solitary sleeping (SS), on infants’ physiological calming through self-regulation during a nap session in 24 infants (50% female, M = 1.85 months SD = 0.93 months), who were identified as either regular co-sleepers with their mothers, infants who slept in the BAL sleeping arrangement from their mother, and infants who are solitary sleepers (SS). The effect of all three sleeping conditions amongst all the three types of infants with different habitual sleeping arrangements was assessed. All infants spent 10 min (2 × 5 min sessions) in each sleeping condition (CS, BAL, SS) during which electrocardiographic recordings were collected to obtain interbeat intervals (IBI) and rMSSD, a measure of heart rate variability (HRV) an index of physiological calming, maintained by the parasympathetic pathway involved in self-regulation. Infants who regularly co-slept with their mothers had the highest IBI, indicating greater physiological calming and self-regulation across all sleeping arrangement conditions (CS, BAL, SS), followed by infants who regularly slept in the BAL sleeping arrangement from their mothers. IBI was lowest amongst regular solitary sleepers, potentially indicating physiological stress due to mother-infant separation. However, HRV indices during the sleeping arrangements (especially across regular solitary sleepers) were inconclusive as to whether the lack of change in HRV across all sleeping conditions was due to physiological stress responses or greater physiological regulation. This study is the first to investigate the effect of manipulated and habitual mother-infant sleeping arrangements on infant physiological calming.     

Effects of presence of mother versus preschool teacher on the behaviour of infants in a strange situation

Seventeen infants (10–24 months of age) were observed twice in a strange situation, once accompanied by mother and once in the company of a familiar preschool teacher. On basis of video-tape recordings a total of 13 behaviour items relevant to infant attachment were scored. The results failed to demonstrate definite differential effects of mother vs. preschool teacher on the infants' behaviors in this situation. In particular, the infants were just as ready to separate themselves from their companions and explore into an adjoining room when attended by the preschool teachers as when accompanied by their mothers. Implications for Ainsworth's and Bowlby's theory of infant attachment are briefly discussed.     

Maternal postpartum depression is a risk factor for infant emotional variability at 4 months

Maternal postpartum depression (PPD) is a risk for disruption of mother–infant interaction. Infants of depressed mothers have been found to display less positive, more negative, and neutral affect. Other studies have found that infants of mothers with PPD inhibit both positive and negative affect. In a sample of 28 infants of mothers with PPD and 52 infants of nonclinical mothers, we examined the role of PPD diagnosis and symptoms for infants’ emotional variability, measured as facial expressions, vocal protest, and gaze using microanalysis, during a mother–infant face-to-face interaction. PPD symptoms and diagnosis were associated with (a) infants displaying fewer high negative, but more neutral/interest facial affect events, and (b) fewer gaze off events.  PPD diagnosis, but not symptoms, was associated with less infant vocal protest. Total duration of seconds of infant facial affective displays and gaze off was not related to PPD diagnosis or symptoms, suggesting that when infants of depressed mothers display high negative facial affect or gaze off, these expressions are more sustained, indicating lower infant ability to calm down and re-engage, interpreted as a disturbance in self-regulation. The findings highlight the importance of not only examining durations, but also frequencies, as the latter may inform infant emotional variability.     

Hilbert and the internal logic of mathematics

Hilbert's programme is shown to have been inspired in part by what we can call Kronecker's programme in the foundations of an arithmetic theory of algebraic quantities.While finitism stays within the bounds of intuitive finite arithmetic, metamathematics goes beyond in the hope of recovering classical logic. The leap into the transfinite proved to be hazardous, not only from the perspective of Gödel's results, but also from a Kroneckerian point of view.Hilbert's rare admission of a Kroneckerian influence does not constitute the basis of such a reconstruction; it is rather Kronecker's mathematical practice which is seen as a forerunner of Hilbert's endeavour in the foundations of mathematics.I am indebted to an anonymous referee for many helpful critical remarks.