One hundred years of infant feeding. Reflections on the development of the understanding of the relationship between infant behavior and infant nutrition.
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Animals↗
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The relationship between maternal confidence and mother-infant behaviors in premature infants.
The purpose of this study was to investigate the relationship between maternal confidence in mothers of premature infants, maternal behaviors and skills, and infant temperament. The relationship between certain prenatal and background variables and maternal confidence also was assessed. The sample consisted of 49 mother--infant pairs from low socioeconomic backgrounds who were followed for 8 months. Maternal behaviors were assessed in the neonatal intensive care unit and during 4- and 8-month follow-up visits at home. Infant temperament was assessed using the Bates Infant Characteristics Questionnaire. The results revealed that maternal confidence was related to education, income, and parity as well as the presence and severity of intraventricular bleed. There was no relationship between observed maternal behaviors and skills and perceived confidence by mothers. Maternal confidence was related to infant temperament ratings.
Adaptation, Psychological↗
Bayley's infant behavior record ratings of infants with recurrent apnea: behavioral profile and correlates with apnea, age, and developmental status.
The goal of this study was to provide a behavioral profile of apneic infants and to examine relationships between behavioral ratings, apnea frequency, age, and concurrent developmental status. Two samples of previously apneic infants were included in this exploratory analysis using the Infant Behavior Record (IBR) as a measure of temperament. Frequency of IBR suspect ratings was more than twice those reported for the Bayley standardization sample for tension, object orientation, attention, and reactivity. Apnea frequency, age, and developmental status were significantly related to a number of IBR ratings with relationships remaining significant for apnea and decreased responsiveness to persons and sensory interest after controlling for age and developmental status in the combined samples. These findings are consistent with a behavioral profile described as a lethargic temperament but may reflect early physiologic instability rather than inherent behavioral style.
Arousal↗
The effects of situations and situation transitions on maternal and infant behavior.
Mothers and their firstborn year-old infants (30 girls, 30 boys) were observed during two counterbalanced situations. In the noninteraction situation, mothers were not to initiate interaction; during interaction mothers were free to interact. Maternal and infant behavior were dependent upon both the situation examined and how it compared to the previous situation. During interaction, mothers directed more behavior toward their infants than during noninteraction; this effect was intensified when noninteraction preceded interaction. Infant looking and proximity-seeking were greater during interaction than during noninteraction, while the reverse was true for touching and vocalization. A decrease in the level of interaction resulted in increases in infant behavior, while the reverse transition was associated with a more variable pattern. Two models describe the interrelationships between changes in maternal and infant behavior. In a reciprocal system, increases by the mother in a given behavior, or in the general interactive level are related to decreases in infant behavior, and vice versa. In an incremental system, any change in maternal behavior is met by increases in infant behavior.
Female↗
The relationship of prenatal maternal anxiety to infant behavior and mother-infant interaction during the first six months of life.
The IPAT Anxiety Scale was administered to a large sample of primiparous women from an economically disadvantaged population in their third trimester of pregnancy. At birth and at three and six months postpartum, the infants and mothers were assessed using a variety of behavioral and standardized procedures. Results indicate that anxiety was not a factor in the incidence of pregnancy and delivery complications or infant anomalies. Neonatal behavior and mother-infant interaction did differ among the high anxious and the low anxious groups. These differences, however, were only significant for female infants. Results are discussed in terms of practical implications and future research.
Adolescent↗
Vitamin B-6 status of Egyptian mothers: relation to infant behavior and maternal-infant interactions.
Functional consequences of marginal maternal vitamin B-6 status for behavior of the neonate and for mother-infant interactions at age 3-6 mo were assessed by a double-blind procedure. In 27 of 70 Egyptian village women studied, vitamin B-6 concentration of their milk was considered indicative of poor maternal vitamin B-6 nutriture. Neonatal behavior, quantified by the Brazelton Neonatal Behavioral Assessment Scale, showed that consolability, appropriate build-up to a crying state, and response to aversive stimuli were significantly correlated with maternal vitamin B-6 nutriture. Naturalistic observational procedures, used twice monthly with infants aged 3-6 mo, indicated that mothers assessed as having marginal vitamin B-6 status were less responsive to their infants' vocalizations, showed less effective intervention to infant distress, and were more likely to use older siblings as care-givers than were mothers of better vitamin status. We conclude that vitamin B-6 was a factor influencing both the behavior of the mother and her infant.
Adult↗
A longitudinal twin study of stability of components from Bayley's Infant Behavior Record.
Factor scores from Bayley's Infant Behavior Record, obtained from about 300-400 infant twins at 6, 12, 18, and 24 months, were selected to represent 3 aspects of infant behavior: task orientation, test affect-extraversion, and activity. Age-to-age correlations for the scores yielded a simplex pattern of low to moderate order. Further age-to-age analyses by twin pairs generally showed that the identical twins, as compared with same-sex fraternal twins, generated more within-pair similarities for profiles of the factor scores across 2 overlapping age ranges: 6-18 months, and 12-24 months. Overall, the findings indicated that there is reordering of individual differences for aspects of infant behavior from one age to the next, but the sequence of reordering is somewhat structured in accord with genotypic similarity. The longitudinal findings are also discussed within the context of change and continuity of the individuality of infant temperament.
Behavior↗
The effect of early contact on maternal perception of infant behavior.
The effect of extra maternal-infant contact during the first postpartum hour on maternal perception of infant behavior one month after delivery was measured by the Broussard Neonatal Perception Inventories and the attachment questions of Klaus and colleagues. All mothers were indigent primiparas who vaginally delivered normal, term infants. 60 mother-infant dyads were randomly assigned to either an extra contact or routine contact group. 49 mothers were available 1 month later for home visits. Scores on the Neonatal Perception Inventories were not significantly affected by either degree of contact or the sex of the child. There was also no difference between contact groups in the maternal response to the attachment questions. Infant behaviors recorded by 24 mothers during the 4 days following home visits were similar in the 2 contact groups. Mothers reported significantly more negative behaviors for female than for male infants. Any effects of extra contact during the first hour after birth on maternal-infant interaction are unlikely to result from changes in maternal perception of infant behavior.
Adolescent↗
Advances in neonatal and infant behavioral assessment: toward a comprehensive evaluation of early patterns of development.
Recognizing the impressive range of behavioral capacities of newborn infants, clinicians and researchers have long searched for valid assessment instruments to help evaluate infant behavior. Behavioral assessments with high predictive validity would aid the goals of developmental diagnostic, prognostic, and treatment programs for infants born at risk from biological or environmental circumstances. The failure of current assessments to predict developmental outcome based on infant behavior may be due to the limited information about higher central nervous system (CNS) functioning obtained from available measures, or to the very dynamic nature of CNS organization in young infants. We begin our review by discussing some major functional characteristics of neonates and then proceed to describe critically the commonly used methods of neurological and behavioral assessment. Noting the need for measures that are more predictive, we turn next to a discussion of a number of experimental techniques that seem to hold great promise for developmental prediction and clinical application.
Child Behavior↗
Infant behavior and the transition to parenthood.
The effects of infant behavior on the transition to parenthood were examined. The primary interest was the relationship between the amount of obligatory infant behavior (behavior that required action on the part of the parents) and the parents' perceptions both of their transition to parenthood and of their infant in terms of an "average" baby. The concepts of normative change, parental perceptions of role competence, and parental self-esteem were examined as intervening variables. Data were collected in the last trimester of pregnancy and at one month after delivery. Findings indicated that the amount of obligatory infant behavior does have an effect on the ease of transition to parenthood and on both parents' perceptions of the infant. The relationships in the research model were found to be better supported for mothers than for fathers, but most of the predicted relationships were supported for both. Fathers experienced less normative change than mothers, and made an easier transition. Mothers, on the other hand, reported higher self-perceptions of role competence.
Adolescent↗
Maternal cocaine use and infant behavior.
We hypothesized that prenatal cocaine exposure results in less optimal infant behavior and more impaired maternal-infant interaction in healthy term infants. Infants were evaluated with the Neonatal Behavioral Assessment Scale (NBAS) at days 1-3 and 11-30 of age, and mother-infant pairs with the Nursing Child Assessment of Feeding Scale (NCAFS) at 7-16 weeks of age. Drug use was determined from confidential interviews, urine assays and medical records. Cocaine-exposed infants (N = 51) were no different than unexposed comparison infants (N = 60) on the first NBAS exam. On the second NBAS exam, 20 cocaine-exposed infants had slightly lower motor cluster scores compared with those of 32 unexposed infants (p = 0.01), but this difference was reduced after control for several confounding variables. The NCAFS detected no differences between groups in maternal or infant behavior. Infants in this population showed no clinically meaningful effects of cocaine exposure on behavior or maternal-infant interaction.
Behavior↗
Effect of early postpartum teaching on primiparas' knowledge of infant behavior and degree of confidence.
The purpose of this experimental study was to determine the effectiveness of teaching primiparous mothers about infant behavior. Experimental mothers (n = 17) received a teaching intervention representative of the Brazelton Neonatal Behavioral Assessment Scale when their infants were 2 weeks old; contrast mothers (n = 16) completed a Newborn Information Checklist about infant behavior at home two weeks postnatally; control mothers (n = 13) received neither teaching nor a checklist. At a 4-week postnatal office visit, experimental mothers had more knowledge about infant behavior than either the contrast or control mothers. There was no difference among the groups regarding maternal confidence in interpreting behavioral cues of their own infant. Contrast mothers reported wanting information about topics included in the teaching intervention.
Adult↗
Studies of marginal zinc deprivation in rhesus monkeys: infant behavior.
Rhesus monkey infants were marginally deprived of zinc (4 ppm diet) from conception and were compared to controls (100 ppm diet) during the first year of life in development of reflexes and motor patterns, mother-infant interaction, delayed response performance, discrimination learning and reversal, and open field behavior. Deficits in amount and variety of behavior were recorded in deprived infants; spontaneous locomotor activity was 50% below control levels in males at 1 mo of age; spontaneous activity was 7-10% lower in both males and females at 3 mo of age; response latencies were 50% lower than controls at 7-9 mo; failure to reach discrimination reversal criterion was seen in 71% of deprived infants as compared to 10% of controls at 10 mo of age; and abnormally low levels of climbing and exploration were seen in two of six deprived infants at 12 mo of age. No abnormalities in the rate of behavioral development or in emotional adaptability were observed. These and other results suggest that syndromes of lethargy, apathy, and hypoactivity are characteristic of behavioral effects of marginal zinc deprivation in primates.
Animals↗
Differences on Bayley's infant behavior record for a sample of high-risk infants and their controls.
3 groups of high-risk newborns and their controls were assessed at 92 weeks post-conceptional age using Bayley's Infant Behavioral Record (IBR). The 3 groups of high-risk infants were those who weighed 1,500 grams or less at birth and required no ventilator therapy, those weighing 1,500 grams or less at birth who required ventilator therapy, and newborns weighing more than 1,500 grams at birth who required ventilator therapy. Controls were healthy term infants matched for 7 socioeconomic and demographic variables. The first principal component of the IBR ratings for the 3 groups of high-risk infants and the controls were similar. All 3 groups of high-risk infants received less desirable IBR ratings on most items than their controls. In addition, there were some differences among high-risk groups; ventilated infants regardless of birth weight received the lowest ratings reflecting overall performance on the IBR, very low birthweight, ventilated newborns were more likely to receive ratings characterizing an overly active infant with a short attention span, and very low birth-weight, never-ventilated infants were most likely to be rated as happy but passive and delayed. The differences between the high-risk infants and controls in large part resulted from infants who were also delayed in terms of their mental and motor development.
Female↗
Parental concerns about infant behavioral organization from term to 4 months.
Parents of 35 premature infants were divided into groups based on the number of contacts made with a nurse and/or pediatrician during a 4-month period. Parental concerns relating to infant behavioral organization, such as crying, sleep-wake cycles, and feeding, were the focus of this study. Significant differences were found between the high-contact group and low-contact group on all 3 infant behavioral variables. Among other infant and maternal variables studied, the severity of perinatal events did not determine the parent's contact group. Mean birth weight and mean gestational age were similar for both groups.
Attitude↗
Effects of naloxone on newborn infant behavior after maternal analgesia with pethidine during labor.
Infants born to mothers receiving 100 mg of pethidine during labor, were randomly given either 100 micrograms of naloxone (n = 14) or 0.25 ml 0.9% NaCl (n = 13) one hour post partum. Infant behavior was assessed with the Brazelton Neonatal Behavioral Assessment Scale (BNBAS) and the Broussard Neonatal Perception Inventory (NPI). No differences in cluster scores on the BNBAS were found between the two groups. Both groups improved scores over time in 4 out of 7 clusters. On the NPI, mothers assessed naloxone infants as having less optimal behavior than did the control mothers. The results of this study on the effects of naloxone on infant behavior and maternal perception of newborn behavior do not warrant administration of naloxone after maternal analgesia with pethidine in the absence of clinical evidence of respiratory depression in the newborn.
Adult↗
Twins: within-pair similarity on Bayley's Infant Behavior Record.
Summary scores for behaviors rated on Bayley's Infant Behavior Record were obtained by summing sequential ratings for same-sex twins participating in a longitudinal study. The first year scores were based on visits made at 3, 6, 9, and 12 months, by 55 identical and 27 fraternal pairs; the second year scores were based on visits at 18, 24, and 30 months, by 47 identical and 27 fraternal pairs. During the first year, within-pair correlations for almost all behaviors were stronger for identical than for fraternal pairs; in the second year, within-pair correlations for identical twins were similar to those of fraternal twins except for the more cognitive behaviors. Composite scores were calculated for two behavioral clusters--one composed of behaviors related to Primary Cognition, and the other composed of behaviors related to Extraversion. Within-pair correlations were higher for identical than for fraternal twins in both the first and second years, indicating stronger and more consistent genetic influences on the more cognitive behaviors.
Age Factors↗
Adult third ventricle width and infant behavioral arousal in groups at high and low risk for schizophrenia.
Previous research has demonstrated: (1) Subjects who are at genetic high risk for schizophrenia and who suffer delivery complications are at increased risk to evidence a widened third ventricle. (2) A widened third ventricle is related to decreased ANS arousal and, among schizophrenics, is related to negative symptom schizophrenia. (3) Adult schizophrenics evidence behavioral analogues of negative symptom schizophrenia premorbidly. This study compared adult CT scans to ratings of infant behavior in 179 subjects (104 at high genetic risk for schizophrenia) with the hypothesis that widened third ventricles would be related to underaroused infant behavior. Results of an ANOVA suggest that subjects who are at genetic high risk for schizophrenia and who evidence a widened third ventricle are more likely to have shown signs of behavioral underarousal as infants. Possible explanations, implications and limitations of the study are discussed.
Adolescent↗