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Biomedical subjects

E Waters

Publications and source records attributed to E Waters.

At least 73 records · Page 4Linked to original sources
PubMed1988

Empirical classification of infant-mother relationships from interactive behavior and crying during reunion.

Multiple discriminant function analysis (MDFA) was conducted with data from 255 Strange Situations conducted and scored by Ainsworth and her colleagues. Cross-validated discriminant functions and classification weights were obtained, allowing attachment classifications (A, B, C) to be assigned directly from scores on interactive behavior and crying during reunion episodes. In the past, classification agreement within laboratories has often been used as a training criterion. Unfortunately, this does not insure that classification criteria agreed upon within a laboratory are comparable across laboratories, nor does it insure that agreed upon criteria will yield the same classifications that would have been assigned by the researchers who developed the scoring system. The present results enable researchers who have mastered the scoring systems for reunion behavior and crying to obtain attachment classifications directly from scores on these variables. Alternatively, this procedure may be used to guide the training of, and validate classification decisions by, local judges.

Crying↗
PubMed1987

Induced mood and preschoolers' behavior: isolating the effects of hedonic tone and degree of arousal.

A circumplex model of emotion was used to examine the role of hedonic tone and degree of arousal in the effects of induced mood on children's persistence behavior. A total of 45 preschool children were asked to describe and think about either exciting, calm, or sad experiences and then perform a persistence task. Heart rate was continuously recorded throughout the session. Observers' ratings of facial expressions and parents' ratings of the experiences provided convergent validation of the induction procedure. Children in the excited induction were rated as displaying facial expressions and generating situations that were high on both pleasure and arousal. The facial expressions and situations of those in the calm induction were also rated as positive, but less arousing, whereas those in the sad induction were rated as low on both. Concurrent heart rate recordings showed differential effects of the mood condition on autonomic arousal during the period when the children were generating the affect-inducing situations. These effects dissipated shortly after the beginning of the concentration phase of the induction procedure. Subsequent performance on a persistence task indicated that higher levels of arousal increased the amount of work completed, whereas higher levels of pleasure did not. Differential levels of autonomic arousal were displayed during the persistence task. These findings validate two important elements of the experimental design: excited versus calm states induce similar levels of pleasure but different levels of arousal, and calm versus sad states induce similar levels of arousal but different levels of pleasure. In previous research, hedonic tone and degree of arousal have often been confounded.(ABSTRACT TRUNCATED AT 250 WORDS)

Affect↗
PubMed1986

Inherited X-chromosome inverted tandem duplication in a male traced to a grandparental mitotic error.

A male infant was referred for cytogenetic evaluation because of dysmorphic features and developmental delay. In both lymphocytes and skin fibroblasts, a modal number of 46 chromosomes was obtained with an obvious elongation of the long arm of the X chromosome (Xq+). Studies of seven members in 3 generations of this family showed that the proband's mother, sister, and maternal grandmother were phenotypically normal carriers of this abnormal X chromosome. High resolution GTG- and RBG-banding defined the extra chromatin material as an inverted duplication of Xq21----Xq24. This was supported by an approximate twofold increase in alpha-galactosidase A activity, localized to Xq21----q24, observed in the proband's lymphocytes and fibroblasts. BrdU-incorporation studies of the mother's lymphocytes showed the abnormal X to be late replicating in all 100 cells studied and normal alpha-galactosidase A levels. Cytogenetic analysis of the maternal grandmother revealed cytogenetic mosaicism with one cell line containing the abnormal X (37%), and the other, a normal female karyotype (63%). This family is instructive since: (1) it represents only the second case of a dysmorphic male demonstrating a confirmed interstitial partial Xq duplication, and (2) the origin of this familial structural rearrangement has been traced to a grandparental mitotic error.

Adult↗
PubMed1985

Mother-infant attachment in adoptive families.

Data from 2 separate samples using the Strange Situation paradigm were combined to assess the quality of attachment relationships in adoptive and nonadoptive mother-infant pairs. Infants were between 13 and 18 months at the time of observation. Results indicated no differences in mother-infant attachment between nonadopted and intraracial adopted subjects or between intraracial and interracial adopted subjects. Interracial adoptive mother-infant pairs did show a higher incidence of insecure attachment in comparison to nonadoptive pairs. Mothers of interracial adopted infants also were less comfortable having others care for their babies and perceived less emotional support from extended family and friends for their decision to adopt a child prior to the actual adoption than did other mothers. No relation was found, however, between quality of mother-infant attachment and either perceived social support, infant developmental quotient, infant temperament, number of foster homes experienced by the infant, or infant's age at the time of adoption placement. It was suggested that the higher incidence of psychological problems found among adoptees in middle childhood and adolescence cannot be explained in terms of insecure attachment relationships during the infancy years.

Adaptation, Psychological↗
PubMed1983

The stability of individual differences in infant attachment: comments on the Thompson, Lamb, and Estes contribution.

In a recent article, Thompson, Lamb, and Estes reported that only 53% of middle-class infants seen in the Ainsworth Strange Situation at 12.5 and 19.5 months received the same attachment classification (avoidant, secure, or resistant) at both ages. Thompson et al. suggest that differences between their results and very high levels of stability reported by Waters can be attributed to subject selection that minimized the incidence of family stress and maximized the possibility of finding stability in the earlier study. In fact, Waters did not employ any procedure for maximizing stability beyond the use of a middle-class sample. Stability of individual differences in infant attachment is a well-replicated finding. Nonreplication in a single small sample is difficult to evaluate. Among the possible explanations, sample differences are weak and necessarily post hoc as explanations for the low stability reported by Thompson et al. It is suggested that when populations are heterogeneous with respect to significant influences on development, quasi-experimental comparisons among well-defined elements of the population and relevant control groups can inform developmental theory; correlational data from small unselected samples cannot.

Employment↗
PubMed1980

Individual differences in infant-mother attachment relationships at age one: antecedents in neonatal behavior in an urban, economically disadvantaged sample.

Neonatal Behavioral Assessment Scales (NBAS) were administered to 100 neonates at 7 and 10 days after birth. The infants and their mothers were subsequently observed in the Ainsworth and Wittig strange-situation procedure at age 1. Infants were classified as secure, anxious/avoidant, or anxious/resistant. When compared with the secure attachment group, anxious/resistant infants scored lower on orientation, motor maturity, and regulation items at day 7. The secure and anxious/avoidant subjects did not differ at day 7. The anxious/resistant group improved from day 7 to day 10, and neither anxious group differed from the secure group on the second examination. The results suggest that early neonatal difficulties may reflect probelms in integrative and adaptive mechanisms which continue to influence behavior, interaction, and eventually attachment relationships, despite the tendency of all normal infants eventually to meet the demands of the neonatal period. In view of the resiliency of neonatal behavior, it is assumed that neonatal difficulties must interact with difficult environments to produce anxious attachments.

Adolescent↗
PubMed1979

Attachment, positive affect, and competence in the peer group: two studies in construct validation.

2 studies were undertaken to assess the positive affective correlates of secure attachment in infancy and to assess the relation between secure attachment in infancy and competence in the peer group at age 3 1/2 years. In study 1, smiling and smiling combined with vocalizing and/or showing toys distinguished securely from anxiously attached infants during free play at age 18 months. Rated quality of affective sharing distinguished securely from anxiously attached infants during free play at 18 months and 24 months. Thus, secure attachment involves more than the absence of negative or maladaptive behavior directed toward a caregiver. Study 2 assessed cross-age, cross-situational, and cross-behavioral consistency in quality of social adaptation. Quality of infant-mother attachment relationships at age 15 months was related to Q-sort assessments of personal and interpersonal competence in the preschool play-group at age 3 1/2 years. The results contribute to the validation of attachment as an important developmental construct. They also suggest that age appropriate assessment of developmental social competence constructs can be a useful alternative to the study of homotypic behavioral continuity.

Affect↗
PubMed1979

Individual differences in infant-mother attachment at twelve and eighteen months: stability and change in families under stress.

100 economically disadvantaged mothers and their infants were observed in the Ainsworth and Wittig "strange situation" at 12 and 18 months. Infants were classified as secure, anxiously attached/avoidant, or anxiously attached/resistant. In addition, mothers reported occurrence of stressful events related to the stability of the caretaking environment during the 12--18 month period by completing a 44-item checklist concerning work, finances, family, neighbors, health, etc. 62 infants were assigned to the same attachment classification at both 12 and 18 months (p less than .01). Despite this stability, significantly more infants changes classification than in a recent study of stable middle-class families. With the present sample, anxious attachment was associated with less stable caretaking environments than secure attachment; change from secure to anxious attachment was associated with higher stressful-event scores than stable secure attachment.

Anxiety↗