Nancy Aaron Jones

How do human beings make sense of their relation to the world and realize their ability to effect change? Applying modern concepts and methods of coordination dynamics, we demonstrate that patterns of movement and coordination in 3 to 4-mo-olds may be used to identify states and behavioral phenotypes of emergent agency. By means of a complete coordinative analysis of baby and mobile motion and their interaction, we show that the emergence of agency can take the form of a punctuated self-organizing process, with meaning found both in movement and stillness.

The study examined the relationship between anxiety, inhibitory control (IC), and resting-state electroencephalography (EEG) in a critical age-range for social and emotional development (8–12-year-olds). The participants were assigned to 4 weeks of either an emotional IC training program, a neutral IC training program, or a waitlisted control, and were tested using cognitive, emotional, and EEG measures. The training was computerized and completed remotely. At baseline, IC accuracy scores were negatively related to both anxiety and depression levels (N = 42). Additionally, increased right lateral frontal alpha asymmetry was predictive of increased anxiety/depression scores. A series of multivariate analyses of covariance and post-hoc tests were conducted to compare effects in the participants that completed the full 16 sessions of training (N = 32). Overall the emotional and neutral training conditions showed similar improvements in IC accuracy, as well as reductions in anxiety compared to the waitlist condition. Minimal neurophysiological changes occurred from pre-to-post; however, lateral frontal asymmetry shifted leftward in the emotional training group. These findings highlight the potential of computerized IC training for mitigating negative emotional functioning in preadolescents. Future research is necessary to determine the long-term effects of IC training and whether longer training intervals facilitate persisting impacts.

Women with perinatal depression have an increased risk for breastfeeding cessation, yet few studies have explored their lived experience. In this qualitative study, semistructured interviews were conducted with a purposeful sample of women (N = 10) who self-reported perinatal depression. Using Giorgi’s descriptive phenomenological method of data analysis, five components were found to embody their lived experience of breastfeeding: (a) choosing selflessness, (b) harboring inadequacy, (c) deliberate persevering, (d) discerning meaning, and (e) cherishing intimacy. Findings contribute to understanding the experience of breastfeeding for this population and could provide guidance to improve lactation management and perinatal mental health education for nurses.

The infant's psycho-physiological regulatory system begins to develop prenatally and continues to mature during the postnatal period. Temperament is a construct comprising tonic individual differences in dispositional physiological and behavioural reactions as well as an evolving ability to regulate to environmental conditions. Theoretical models and research have shown that neurohormonal and -physiological factors contribute to individual development and impact infant behaviours as well as the developing regulatory system. Moreover, prenatal maternal risks such as stress and depression are thought to programme fetal regulatory tendencies and that influences neural and behavioural functioning in infancy. The purpose of this review is to examine the theories and research that link infant temperament to neurohormonal and -physiological development in typically developing infants and in those exposed to environmental risk. Research has demonstrated associations between individual variation in physiological stress responses and regulation (measured with cortisol). Moreover, studies have noted an association with physiological regulation and socio-emotional interaction (as measured by the touch–oxytocin link) that may buffer emotional dysregulation. The interaction between individual differences in temperamental tendencies, neurohormonal and -physiological patterns will be discussed by presenting data from studies that have shown that infant neurohormonal and -physiological functioning sets an important trajectory for the development of the individual. This article is part of the theme issue ‘Diverse perspectives on diversity: multi-disciplinary approaches to taxonomies of individual differences’.

Recent research has demonstrated a relationship between infants' tonic electroencephalogram (EEG) patterns and approach‐style jealousy responses (Mize & Jones, ). Although it has been found that adults exhibit approach‐style neural activity during jealousy paradigms (Harmon‐Jones, Peterson, and Harris, ), parallel research on neural activity during a jealousy paradigm in infants is lacking from the literature base. The purpose of the current research is to examine EEG patterns of 35 infants (Mean age = 8.92 months old) in a social‐rival paradigm designed to elicit jealousy responses. Consistent with past research, infants demonstrated more approach‐style, jealousy‐related behaviors when their mothers attended to a social‐rival than to a nonsocial rival. Additionally, infants demonstrated approach‐style anterior EEG activity during the social‐rival condition, a pattern that is associated with jealousy. The current findings suggest that the physiological underpinnings for the emotions that motivate the protection of important dyadic relationships are in place early in ontogeny. Therefore, jealousy‐type behaviors and physiological responses begin to be observable as early as 9‐months‐old when maternal attention is lost to a social‐rival.