共查询到20条相似文献，搜索用时 15 毫秒
1.
Individual differences in infant-mother attachment at twelve and eighteen months: stability and change in families under stress 总被引：1，自引：0，他引：1
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. 相似文献
2.
Propper C Moore GA Mills-Koonce WR Halpern CT Hill-Soderlund AL Calkins SD Carbone MA Cox M 《Child development》2008,79(5):1377-1394
This study investigated dopamine receptor genes (DRD2 and DRD4) and maternal sensitivity as predictors of infant respiratory sinus arrhythmia (RSA) and RSA reactivity, purported indices of vagal tone and vagal regulation, in a challenge task at 3, 6, and 12 months in 173 infant-mother dyads. Hierarchical linear modeling (HLM) revealed that at 3 and 6 months, RSA withdrawal in response to maternal separation was greater (suggesting expected physiological regulation) in infants without the DRD2 risk allele than those with the risk allele. At 12 months, infants with the risk allele who were also exposed to maternal sensitivity showed levels of RSA withdrawal comparable to infants who were not at genetic risk. Findings demonstrate the importance of developmental analysis of gene-environment interaction. 相似文献
3.
Huei-Mei Liu 《Early education and development》2014,25(8):1103-1117
Research Findings: I examined the long-term association between the lexical and acoustic features of maternal utterances during book reading and the language skills of infants and children. Maternal utterances were collected from 22 mother–child dyads in picture book–reading episodes when children were ages 6–12 months and 5 years. Two aspects of language input were studied: lexical features (the amount and diversity of vocabulary, and the proportion of isolated target words) and an acoustic feature (the acoustic space of vowels). Standardized language tests were used to assess receptive vocabulary and language production abilities at age 5. The results showed that greater diversity of vocabulary and the use of fewer isolated target words during book reading with infants were associated with enhanced language skills in children 4 years later. Regression analyses showed that the proportion of isolated target words was the most potent predictor of, and acoustic vowel space also accounted for, variance in language expression skills at age 5. Maternal utterances and mothers' education jointly accounted for more than 60% of the variance in language abilities. Practice or Policy: These findings suggest that lexical and acoustic inputs in picture book reading with infants have long-term associations with children's language development throughout early childhood. 相似文献
4.
Eeva-Leena Kataja Linnea Karlsson Jukka M. Leppänen Juho Pelto Tuomo Häikiö Saara Nolvi Henri Pesonen Christine E. Parsons Jukka Hyönä Hasse Karlsson 《Child development》2020,91(2):e475-e480
We examined how infants’ attentional disengagement from happy, fearful, neutral, and phase-scrambled faces at 8 months, as assessed by eye tracking, is associated with trajectories of maternal depressive symptoms from early pregnancy to 6 months postpartum (decreasing n = 48, increasing n = 34, and consistently low symptom levels n = 280). The sample (mother–infant dyads belonging to a larger FinnBrain Birth Cohort Study) was collected between 5/2013–6/2016. The overall disengagement probability from faces to distractors was not related to maternal depressive symptoms, but fear bias was heightened in infants whose mothers reported decreasing or increasing depressive symptoms. Exacerbated attention to fearful faces in infants of mothers with depressive symptoms may be independent of the timing of the symptoms in the pre- and postnatal stages. 相似文献
5.
This study examines the relationships between neonatal sleep respiratory instability and infant development. A group of 122 full-term healthy infants was observed during a nap within the first and fourth weeks of life. During each nap, a continuous polygraphic recording was obtained of respiratory activity and extraocular movements. The relative frequency and average duration of apneic pauses (greater than or equal to 2 sec) in each testing session for an infant were employed to calculate a measure of respiratory instability (PSA4) previously found to be related to the occurrence of prolonged sleep apnea. 28 of the infants in this study were maintained at home on apnea monitors. The Bayley Scales of Infant Development were administered to each infant at approximately 9 months of age. Comparisons of infants with high versus low PSA4 values and of monitored versus unmonitored infants were not strongly distorted by imbalances in birth weight, sex, race, birth order, method of feeding, Sudden Infant Death Syndrome (SIDS) sibship, parental education, age at developmental assessment, and developmental tester. Those with increased respiratory instability (PSA4 greater than or equal to -0.04) within the first week of life averaged significantly lower in mental and psychomotor development. Utilization of home apnea monitors was not significantly associated with developmental scores. 相似文献
6.
The present study investigated vowel discrimination in 2-week-old infants using a nonnutritive, high-amplitude sucking measure in a habituation-dishabituation paradigm. Infants were presented with pairs of vowel stimuli differing in equal logarithmic steps along the /i/ to /I/ continuum. Stimulus pairs of equal acoustic differences were selected to be either within or between the adult phonetic categories. Infants were divided into 3 experimental stimulus shift conditions: within category, between category, and control. Using a scoring system to asses perinatal events, half the infants in each condition were categorized as being at "higher risk" for developmental (p less than .05) were found between the control and both the within and between phonetic category conditions. No effects due to risk score population differences proved to be significant. These results indicate that 8-week-old infants discriminate the vowels /i/ and /I/ in a continuous as opposed to a categorical manner. Some differences were noted in response patterns between high- and low-risk score infants. 相似文献
7.
The development of visual expectations in the first year 总被引：1，自引：0，他引：1
The development of expectations was investigated by using the Visual Expectations Procedure. In Experiment 1, 128 infants aged 6-, 9-, and 12-months-old saw two 40-trial sequences of a videotaped mechanical toy appearing in various locations. The sequences represented an alternation pattern (i.e., ABAB) or a complex pivot pattern (i.e., ABCBABCB). In Experiment 2, 76 infants aged 4-, 8-, and 12-months-old saw either a left-right alternation or a top-bottom alternation. Reaction time improved and the percentage of anticipations increased between 6 and 9 months in Experiment 1 and between 4 and 8 months in Experiment 2 but not thereafter. Anticipations for the pivot sequence and for younger infants on both sequences were often incorrect (i.e., gaze shifts occurred before stimulus onset but were not directed toward the upcoming stimulus). We conclude that young infants have expectations that reflect some degree of general or procedural knowledge, but it is not clear that this behavior implies specific, articulated expectations about upcoming events. 相似文献
8.
Dampening of Adrenocortical Responses during Infancy: Normative Changes and Individual Differences 总被引：6，自引：0，他引：6
Changes in cortisol and behavioral responses were examined longitudinally in 83 infants (39 girls, 44 boys) tested at their well-baby exams with inoculations at 2, 4, 6, and 15 months (72 infants completed all testing). Another sample of 2-, 4-, and 6-month-olds ( n = 18 per age) received mock exams without inoculations to determine early developmental changes to the exam procedures. Behavioral distress was coded every 30 sec during the exam, a 5-min inoculation period, and a 20-min recovery period. Salivary cortisol was obtained upon arrival at the clinic and 25 min after the beginning of the inoculation period. To the exam-inoculation procedures, cortisol responses were high at 2 months, decreased significantly between 2 and 4 months, remained comparable between 4 and 6 months, and then declined again between 6 and 15 months. Between 6 and 15 months there was also a decrease in pretest cortisol. By 15 months, significant increases in cortisol from pre- to posttest were no longer observed for most infants. To the exam-only procedures, cortisol responses decreased between 2 and 4 months, and by 4 months most infants failed to show pre- to posttest increases in cortisol. Behavioral distress decreased between 2 and 6 months, but increased again at 15 months. While crying and cortisol were modestly correlated during the 2- to 6-month exam-inoculation procedures, at 15 months no significant correlations were obtained. Behavioral and hormonal reactions thus followed different ontogenetic paths and may provide different information about infant functioning. There was some evidence that the emergence of the circadian rhythm in cortisol might be related to the early decrease in cortisol response. 相似文献
9.
To evaluate which features of spoken language aid infant word learning, a corpus of infant‐directed speech (M. R. Brent & J. M. Siskind, 2001) was characterized on several linguistic dimensions and statistically related to the infants’ vocabulary outcomes word by word. Comprehension (at 12 and 15 months) and production (15 months) were predicted by frequency, frequency of occurrence in one‐word utterances, concreteness, utterance length, and typical duration. These features have been proposed to influence learning before, but here their relative contributions were measured. Mothers’ data predicted learning in their own children better than in other children; thus, vocabulary is measurably aligned within families. These analyses provide a quantitative basis for claims concerning the relevance of several properties of maternal English speech in facilitating early word learning. 相似文献
10.
Recent reports have suggested that day-care experience initiated prior to 12 months of age is associated with increased proportions of infants whose attachment to mother is classified as "insecure-avoidant." However, reviewers have questioned the generality of these findings, noting that samples in which associations between early day-care experience and avoidant attachment patterns have been reported come from high-risk populations, and/or that the infants' day-care settings may not have been of high quality. In the present study, effects of maternal absences on infant-mother attachment quality were assessed in a low-risk, middle-class sample (N = 110). In all instances, substitute care had been initiated at least 4 months prior to the infant's first birthday and was provided in the infant's home by a person unrelated to the baby. Infants were assessed using the Ainsworth Strange Situation when they were 12-13 months of age. Analyses indicated that a significantly greater proportion of infants whose mothers worked outside the home (N = 54) were assigned to the category "insecure-avoidant" as compared to infants whose mothers remained in the home (N = 56) throughout the first year of life. Analyses of demographic and psychological data available for the sample indicated that this relation is dependent upon maternal parity (primi- vs. multiparous mother). The association between attachment quality and work status was significant only for firstborn children of full-time working mothers. The results are interpreted as evidence that the repeated daily separations experienced by infants whose mothers are working full-time constitute a "risk" factor for the development of "insecure-avoidant" infant-mother attachments. 相似文献
11.
Lonnie Zwaigenbaum Susan E. Bryson Jessica Brian Isabel M. Smith Lori Sacrey Vickie Armstrong Wendy Roberts Peter Szatmari Nancy Garon Tracy Vaillancourt Caroline Roncadin 《Child development》2021,92(3):1187-1198
The objectives were to characterize behavioral signs of autism spectrum disorder (ASD) in younger siblings of diagnosed children (high-risk; HR) and examine classification features of the Autism Observation Scale for Infants (AOSI). Participants (501 HR and 180 low-risk [LR]) were assessed between 6 and 18 months using the AOSI and at age 3 for ASD diagnoses. Total AOSI scores differentiated HR infants later diagnosed with ASD starting at 12 months. ROC analyses identified 12- and 18-month cutoff scores associated with 0.52 sensitivity and 0.74 specificity and 0.73 sensitivity and 0.65 specificity, respectively. Although classification accuracy does not support use as a standalone screen, the AOSI identifies features associated with ASD starting at 6 months and differentiates HR infants with ASD by 12 months. 相似文献
12.
A descriptive analysis of infant social referencing 总被引：3，自引：0，他引：3
13.
Samantha Plate Lisa Yankowitz Leslie Resorla Meghan R. Swanson Shoba Sreenath Meera Annette Estes Natasha Marrus Meredith Cola Victoria Petrulla Aubrey Faggen Juhi Pandey Sarah Paterson John R. Pruett Jr. Heather Hazlett Stephen Dager Tanya St. John Kelly Botteron Lonnie Zwaigenbaum Joseph Piven Robert T. Schultz Julia Parish-Morris IBIS Network 《Child development》2022,93(2):468-483
Infant vocalizations are early-emerging communicative markers shown to be atypical in autism spectrum disorder (ASD), but few longitudinal, prospective studies exist. In this study, 23,850 infant vocalizations from infants at low (LR)- and high (HR)-risk for ASD (HR-ASD = 23, female = 3; HR-Neg = 35, female = 13; LR = 32, female = 10; 80% White; collected from 2007 to 2017 near Philadelphia) were analyzed at 6, 12, and 24 months. At 12 months, HR-ASD infants produced fewer vocalizations than HR-Neg infants. From 6 to 24 months, HR-Neg infants demonstrated steeper vocalization growth compared to HR-ASD and LR infants. Finally, among HR infants, vocalizing at 12 months was associated with language, social phenotype, and diagnosis at age 2. Infant vocalizing is an objective behavioral marker that could facilitate earlier detection of ASD. 相似文献
14.
The Impact of Postnatal Depression and Associated Adversity on Early Mother-Infant Interactions and Later Infant Outcome 总被引：15，自引：0，他引：15
Lynne Murray Agnese Fiori-Cowley Richard Hooper Peter Cooper 《Child development》1996,67(5):2512-2526
The impact of maternal depression and adversity on mother-infant face-to-face interactions at 2 months, and on subsequent infant cognitive development and attachment, was examined in a low-risk sample of primiparous women and their infants. The severe disturbances in mother-infant engagement characteristic of depressed groups in disadvantaged populations were not evident in the context of postpartum mood disorder in the present study. However, compared to well women, depressed mothers were less sensitively attuned to their infants, and were less affirming and more negating of infant experience. Similar difficulties in maternal interactions were also evident in the context of social and personal adversity. Disturbances in early mother-infant interactions were found to be predictive of poorer infant cognitive outcome at 18 months. Infant attachment, by contrast, was not related to the quality of 2-month interactions, but was significantly associated with the occurrence of adversity, as well as postpartum depression. 相似文献
15.
One of the major adaptations during the infancy period is the development of the ability to cope with arousing or uncertain events. The following study was designed to examine emotion regulation strategy use between 6 and 18 months. 75 infants (25 each of 6-, 12-, and 18-month-olds) were videotaped interacting with 3 female strangers. Coping strategies were coded using a portable computer with a continuous sampling program, enabling coders to record both frequencies and durations of behaviors. Results indicated that 6-month-olds were more likely than 12- or 18-month-olds to use gaze aversion and fussing as their primary emotion regulation strategies, and were less likely than the older infants to use self-soothing and self-distraction. 18-month-olds were more likely than the younger infants to attempt to direct their interactions with the strangers. Infants' strategy use also differed as a function of their wariness of strangers, particularly at 12 months of age. 相似文献
16.
Social precursors to symbolic understanding of pictures were examined with 100 infants ages 6, 9, 12, 15, and 18 months. Adults demonstrated 1 of 2 stances toward pictures and objects (contemplative or manipulative), and then gave items to infants for exploration. For pictures, older infants (12, 15, and 18 months) emulated the adult's actions following both types of demonstration trials. For objects, infants did not emulate actions following either stance at any age. The findings suggest that infants enlist their imitative learning skills in the context of learning the conventions of action on pictorial symbols. The data are interpreted as pointing to the importance of social learning in developing an understanding of the referential function of pictorial symbols. 相似文献
17.
A number of preterms who had participated in a study of visual recognition memory when they were 6 months of age were seen at older ages to assess the predictive validity of the early visual measures for cognitive outcome. The Bayley scales were administered at 6, 12, and 24 months, the Stanford-Binet at 34 and 40 months, and the WISC-R at 6 years. Novelty scores, which reflect the relative amount of time infants look at new compared to familiar stimuli, constituted the measure of infant visual processing. These scores, obtained by averaging over performance on the 3 or 4 problems administered at 6 months of age, were consistently and significantly related to cognitive measures from 24 months to 6 years, with correlations ranging from r = .53 to r = .66. Parental education, which was unrelated to novelty scores, bore a strong relationship to outcome beginning at 24 months. Although both measures contributed uniquely to the variance in cognitive outcome at 24 months and 6 years, visual novelty scores made a stronger contribution than did parental education. Neither 6- nor 12-month Bayley scores, nor various perinatal variables, were related to outcome. 相似文献
18.
Two experiments were carried out to compare the spelling of children who speak General American English and children who speak Southern British English. The first dialect is rhotic (/r/may occur after a vowel in a syllable), and the second is nonrhotic (/r/may not occur in this context). Young children's spelling errors reflected the characteristics of their dialect. For example, American children with spelling ages of about 6–7½ often misspelled hurt as "hrt" whereas British children of similar spelling levels were more likely to misspell it as "hut." Such errors were uncommon by spelling ages of greater than 7½. Even at these spelling ages, however, the British children made overgeneralization errors that reflected their dialect. For example, they sometimes spelled bath as "barth" based on the fact that bath contains the same vowel sound as card in their dialect. The results show that phonology plays an important role in children's spelling development. 相似文献
19.
Lynne A. Werner G. Cameron Marean Christopher F. Halpin Naney Benson Spetner Jay M. Gillenwater 《Child development》1992,63(2):260-272
The development of auditory temporal acuity during infancy was examined in 3-, 6-, and 12-month-old infants and in adults using the gap detection paradigm. Listeners detected a series of gaps, or silent intervals, or variable duration in a broadband noise. In order to vary the acoustic frequencies available to the listener, a high-pass noise was used to mask frequencies above specified cutoffs. High-pass maskers with cutoffs of 500, 2,000, and 8,000 Hz were used. The minimum detectable gap was determined using the Observer-based Psychoacoustic Procedure. The thresholds of 3- and 6-month-olds were considerably poorer than those of the adults, although the effect of masker condition was about the same for these 3 groups. The thresholds of 12-month-olds were significantly worse than the adults when the stimulus was unmasked or when the masker cutoff frequency was 2,000 or 8,000 Hz. When the masker cutoff frequency was 500 Hz, 12-month-olds fell into 2 groups: some had gap thresholds that were about the same as 3- and 6-month-olds, while some had gap thresholds that approached those of adults. In a second experiment, a larger group of 12-month-olds were tested with a 500-Hz masker cutoff. Average performance of 12-month-olds was about the same as that of 3- and 6-month-olds in Experiment 1. Some infants attained thresholds close to those of adults. Thus, gap detection thresholds are quite poor in infants, although the similarity of the effect of frequency on performance in infants and adults suggests that the mechanisms governing temporal resolution in infants operate qualitatively like those in adults. 相似文献
20.
Trajectories of Infants’ Biobehavioral Development: Timing and Rate of A‐Not‐B Performance Gains and EEG Maturation 
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下载免费PDF全文 Leigha A. MacNeill Nilam Ram Martha Ann Bell Nathan A. Fox Koraly Pérez‐Edgar 《Child development》2018,89(3):711-724
This study examined how timing (i.e., relative maturity) and rate (i.e., how quickly infants attain proficiency) of A‐not‐B performance were related to changes in brain activity from age 6 to 12 months. A‐not‐B performance and resting EEG (electroencephalography) were measured monthly from age 6 to 12 months in 28 infants and were modeled using logistic and linear growth curve models. Infants with faster performance rates reached performance milestones earlier. Infants with faster rates of increase in A‐not‐B performance had lower occipital power at 6 months and greater linear increases in occipital power. The results underscore the importance of considering nonlinear change processes for studying infants’ cognitive development as well as how these changes are related to trajectories of EEG power. 相似文献