Infant temperament and maternal sensitivity behavior in the first year of life

Maternal sensitivity behavior (MSB) and infant temperament were investigated among 56 Finnish low-risk mothers and their full-term and healthy infants. The mothers were from families with good economic status, the infant's parents lived together, and the mothers were well educated. Mothers and infants were video-recorded in free-play situations at home, and evaluated using the Parent-Child Early Relational Assessment Scale (PCERA). The infants were also assessed using the Revised Infant Temperament Questionnaire (R-ITQ) and the Toddler Temperament Questionnaire (TTQ). Most of the temperament characteristics showed moderate stability during the first year. MSB was related to infant temperament characteristics at 3, 6 and 12 months of age. Gender differences in temperament were evident already at 6 and 12 months of age. Few prior studies have reported gender differences in infancy.     

The structure of infant temperament: Factor analysis of the revised infant temperament questionnaire

Factor analyses of the Carey and McDevitt (1978) Revised Infant Temperament Questionnaire (RITQ) with a representative sample of 2,443 Australian infants provided limited empirical support for its 9-dimension structure and indicated considerable redundancy in the scale. Of the 9 dimensions, only Rhythmicity and Persistence emerged as relatively pure factors. The other factors were formed from various combinations or divisions of the dimensions. Five infant temperament factors, Approach, Rhythmicity, Cooperation/Manageability, Activity/Reactivity, and Irritability, were chosen for the development of a short form (SITQ). This short form showed good internal consistency and replicability across subsamples of the total group, A 3-factor composite scale was also developed that allowed measurement of an easy to difficult continuum that was strongly related to concurrent behavior problems. Good test-retest reliability was demonstrated for both the 5 separate scales and the composite scale. Although similarities can be shown between the SITQ and various other infant temperament scales, the SITQ has the advantages of parsimony and a firm empirical basis.     

From semantics to syntax and back again: argument structure in the third year of life

An essential part of the human capacity for language is the ability to link conceptual or semantic representations with syntactic representations. On the basis of data from spontaneous production, suggested that young children acquire such links on a verb-by-verb basis, with little in the way of a general understanding of linguistic argument structure. Here, we suggest that a receptive understanding of argument structure--including principles linking syntax and conceptual/semantic structure--appears earlier. In a forced-choice pointing task we have shown that toddlers in the third year of life can map a single scene (involving a novel causative action paired with a novel verb) onto two distinct syntactic frames (transitive and intransitive). This suggests that even before toddlers begin generalizing argument structure in their own speech, they have some representation of conceptual/semantic categories, syntactic categories, and a system that links the two.     

The longitudinal associations between temperament and sleep during the first year of life

Temperament and sleep in infants are related but also distinct concepts. The longitudinal effects of temperament on sleep in infancy remain unclear, although this information is potentially important for the prevention and treatment of early sleep problems. We examined how various temperament features influence sleep development during the first year of life in a large birth cohort. This study comprised mother-infant dyads with complete longitudinal data on sleep, temperament and sociodemographic measurements at six and 12 months (N = 1436). We observed that higher infant Negative Affectivity was related to several sleep problems, and that many subscales of Negative Affectivity and Orienting/Regulation predicted worse sleep and deterioration in sleep problems from six to 12 months. Few associations between Surgency and sleep were found. Our findings highlight especially Negative Affectivity as a risk factor for persistent and increasing sleep problems, and also the specific importance of the fine-grained aspects of temperament in predicting infant sleep development.     

Adult temperament and childbearing over the life course

Emerging evidence suggests that temperament may predict childbearing. We examined the association between four temperament traits (novelty seeking, harm avoidance, reward dependence and persistence of the Temperament and Character Inventory) and childbearing over the life course in the population‐based Cardiovascular Risk in Young Finns study (n = 1535; 985 women, 550 men). Temperament was assessed when the participants were aged 20–35 and fertility history from adolescence to adulthood was reported by the participants at age 30–45. Discrete‐time survival analysis modelling indicated that high childbearing probability was predicted by low novelty seeking (standardized OR = 0.92; 95% confidence interval 0.88–0.97), low harm avoidance (OR = 0.90; 0.85–0.95), high reward dependence (OR = 1.09; 1.03–1.15) and low persistence (OR = 0.91; 0.87–0.96) with no sex differences or quadratic effects. These associations grew stronger with increase in numbers of children. The findings were substantially the same in a completely prospective analysis. Adjusting for education did not influence the associations. Despite its negative association with overall childbearing, high novelty seeking increased the probability of having children in participants who were not living with a partner (OR = 1.29; 1.12–1.49). These data provide novel evidence for the role of temperament in influencing childbearing, and suggest possible weak natural selection of temperament traits in contemporary humans. Copyright © 2009 John Wiley & Sons, Ltd.     

Developmental trajectory of intersubjectivity in the second and third year of life: Study of fixed-population and random-individual effects

Colwyn Trevarthen claimed that babies have an intrinsic motivation to communicate and engage with others that he called intersubjectivity. Around the ninth month of life, this motivation changes and passes from person-to-person dyadic (primary intersubjectivity) to triangulate a person–person–object relationship (secondary intersubjectivity). Despite the scientific consensus on this developmental leap, few empirical studies explore the trajectory of this more complex form of intersubjectivity between the second and third year of life. One hundred and fifteen free play sessions from 27 mother–child dyads (13 girls and 14 boys) between 9 and 37 months were filmed and were categorized based on the Level of Intersubjective Attunement Scale. The data were analysed using a linear mixed-effects model. Results show both a population trajectory of the levels of intersubjective attunement and random individual differences. We discuss these results in relation to the binomial typical developmental route and interindividual variability.     

Early infant temperament shapes the nature of mother-infant bonding in the first postpartum year

ObjectiveThis study examined longitudinal relations between maternal bonding and infant temperament in the first nine months after birth.DesignOur sample consisted of 281 women, enrolled at five maternity hospitals, who completed questionnaires during the first week (T1), at six weeks (T2) and nine months postpartum (T3). Maternal bonding was assessed using the Mother-to-Infant Bonding Scale at T1 and T2 and the Postpartum Bonding Questionnaire at T3. Infant temperament was measured using the Infant Characteristics Questionnaire, completed by the mothers at T2 and T3.ResultsThe results of a path model showed a long-term effect flowing from the child to the mother, with infant temperament at T2 predicting maternal bonding at T3 over and above stability in bonding. At T3, bonding was linked more strongly to child temperament at T2 than to child temperament assessed concurrently at T3. Maternal bonding did predict infant temperament, but this was true only of bonding reported at T1 and infant temperament at T2, that is, not of bonding assessed at T2 and infant temperament at T3.ConclusionOur results indicate that maternal bonding in the first week postpartum may temporarily affect child temperament, but infant’s temperament several weeks after birth – rather than several months postpartum – plays a pervasive role in shaping the long-lasting nature of the mother-child relationship. Our findings thus seem to support the suggestion that the early postpartum weeks represent an important period in the development of maternal bonding.     

The structure and reliability of the teacher temperament questionnaire

The Teacher Temperament Questionnaire is a recently developed instrument designed for personality assessment with preschool and early school children. The present study employed a sample of 116 in order to study the reliability and structure of the TTQ. A principal-components analysis yielded four well-defined components, which were labeled Compliance, Extraversion, Interpersonal Affect, and Environmental Sensitivity. These results did not support the theoretical scales. The component patterns were well defined and stable across the two administrations of the inventory. Internal consistency and test-retest reliability coefficients were determined for each of the four new scales. A second administration involving only items from the first three components provided a partial replication.An initial version of this paper was presented at the Northeastern Educational Research Association Meeting, Ellenville, New York, October 1979.     

An investigation into differences between the structure of temperament and the structure of personality

This article analyzes the differences between an activity-specific temperament model and the Big Five personality model using the Structure of Temperament Questionnaire--Compact (STQ-77). The STQ-77 has 3 emotionality scales and 9 scales assessing 3 dynamic aspects (arousal, lability, and sensory sensitivity) in 3 areas of activity (physical, verbal-social, and mental). The results of administration of the Russian STQ-77, NEO-FFI, and SSS-V to 174 Russian participants showed how components of temperament can represent the traits described in the Big Five model. The confirmatory factor analysis of the English STQ-77 and the results of a study involving a prolonged word classification task with 221 Canadian participants showed the benefits of the activity-specific approach, separating temperament traits in three areas of activity. Such specificity of temperament traits differentiates them from personality traits.     

Memory reactivation in the second year of life

Memory reactivation has not been systematically studied with infants older than 1 year. Currently, three experiments examined the effects of a reactivation treatment (priming) on retention throughout the second postnatal year. Fifteen- and 18-month-olds learned an operant train task, forgot it, received a 2-min or 10-s prime, and later were tested for retention. Although the longer prime was effective for 15-month-olds, 18-month-olds required the shorter prime (Experiment 1). The memory was reactivated after delays two (18 months) and three (15 months) times longer than infants originally remembered it (Experiment 2). The reactivated memory was forgotten as fast as the original memory after the 2-min prime and twice as fast after the 10-s prime (Experiment 3). The fact that reactivation changes quantitatively but not qualitatively throughout infancy suggests that the same mechanism mediates it at all ages. These findings have major implications for the impact of early experience on cognitive development.     

Factor structure of patient and caregiver ratings on the dementia quality of life instrument

Preliminary evidence suggests that quality of life reports from patients diagnosed with mild cognitive impairment (MCI) and mild Alzheimer's disease (AD) are as reliable and valid as data provided by caregivers. To date, no studies compared the factor structure of data provided by caregivers and patients. Factor analyses are important to conduct because they are an indicator of validity. This study compared the factor structure of patient and caregiver reports on the Dementia Quality of Life scale (DQoL). Participants (N=67) were patients diagnosed with amnestic MCI or mild AD and their caregivers. Principal axis factor analyses were run separately on patient and caregiver report data. The three-factor solutions for patient and caregiver data were nearly identical. Three factors corresponding to positive affect, negative affect, and aesthetics emerged reliably from analyses. Thus, data from patients demonstrated a factor structure that was highly consistent with caregiver report data and conformed to meaningful psychological constructs.     

Factor structure of the childhood anxiety sensitivity index.

We developed various factor models of the Childhood Anxiety Sensitivity Index [Silverman, W. K., Fleisig, W., Rabian, B. & Peterson, R. A. (1991). Childhood anxiety sensitivity index. Journal of Clinical Child Psychology, 20, 162-168] and tested the goodness of fit of the models in an independent sample. Of primary interest was to examine the question that characterized the factor analytic studies conducted on the adult version of the anxiety sensitivity index, i.e. the ASI [Reiss, S., Peterson, R. A., Gursky, D. M. & McNally, R. J. (1986). Anxiety sensitivity, anxiety frequency and the prediction of fearfulness. Behaviour Research and Therapy, 24, 1-8]: is anxiety sensitivity in children a unidimensional construct, an orthogonal multidimensional construct, or a hierarchical construct? Two independent samples (a clinic sample and a nonclinical sample) were used for development and replication of the factor models. The clinic sample consisted of 258 children (105 girls and 153 boys) who presented to a child anxiety disorders specialty clinic. The unselected, nonclinic sample consisted of 249 children (122 girls and 127 boys) enrolled in an elementary school. The results provided strong empirical support for a hierarchical multidimensional model with either three or four first-order factors. The two factors that emerged that appeared to be robust were Physical Concerns and Mental Incapacitation Concerns. What remains unresolved is whether Control of anxiety symptoms and Social Concerns are to be differentiated (as in the hierarchical model with four first-order factors) or not (as in the hierarchical model with three first-order factors). In addition to discussing this issue, the convergence of the present study's findings with past findings obtained with the ASI is discussed.     

道教内丹性命双修与中国器乐形神俱妙

一 、道 教 内 丹 学 中 的 性 、命 身 、命 、气 、精 、形 等 物 质 性 范 畴 。 固 ,气 聚 则 神 灵 。 性 无 命 不 立 ,命 性 命 二 字 为 道 教 内 丹 学 之 纲 在 “性 命 关 系 ”方 面 则 代 表 了 “物 无 性 不 存 。 真 人 云 :“神 是 性 兮 气要 , 内 丹 学 文 献 中 对 性 命 问 题 的 质 与 精 神 ”、“身 与 心 ”、“形 与 神 ”、 …     

Native-language sensitivities: evolution in the first year of life

In the first few months of their lives, human infants can perceive differences in phonetic contrasts not present in their environment and that their parents cannot discriminate. At 12 months, their pattern of discrimination approaches that of their parents. Until recently, it was believed that the perception of native-language categories did not significantly evolve in that period. Kuhl et al. offer compelling new evidence indicating significant increase in native-language perception.     

Individualized behavior therapy for alcoholics: a third year independent double-blind follow-up.

An independently conducted double-blind study providing third year follow-up data for 53 of 70 male alcoholics who served as subjects in an experiment evaluating “Individualized Behavior Therapy (IBT)” techniques is reported. In the original study, subjects were initially assigned to either a controlled drinking or non-drinking (abstinence) treatment goal, and were then randomly assigned to either an experimental group receiving IBT or a control group receiving conventional state hospital treatment oriented towards abstinence. Previously reported results showed that IBT subjects functioned significantly better than control subjects throughout the first year of follow-up. Second year follow-up results found that IBT subjects treated with a controlled drinking goal functioned significantly better than their respective control subjects on a variety of measures, including drinking behavior. Differences between IBT subjects treated with a non-drinking goal and their control subjects did not retain statistical significance during the second year of follow-up. The independently determined follow-up data showed that during the third post-treatment year, subjects in the experimental groups generally functioned better than their respective control subjects. Comparison of the controlled drinking experimental group with its control group showed the significantly better functioning of subjects in the experimental condition on a number of drinking and other life functioning measures. Comparison of the non-drinking groups indicated only one possible difference on the drinking related measures involving a trend for subjects in the experimental condition to abstain more than those in the non-drinker control group. On other life functioning measures, however, subjects in the non-drinking experimental condition showed consistent improvement over their respective control subjects. Both of the controlled drinking groups reported more controlled drinking days than the non-drinking groups throughout the third year follow-up period.     

Visual short-term memory in the first year of life: capacity and recency effects.

A span task was developed to assess the amount of information infants could hold in short-term memory. In this task, infants were presented with up to 4 items in succession and then tested for recognition by successively pairing each item with a novel one. A large sample of full-terms and low-birth-weight preterms (< 1,750 g) was tested longitudinally, at 5, 7, and 12 months of age. Results were similar for both groups: (a) Longer spans were more difficult, especially at the 2 younger ages; (b) memory capacity increased over the 1st year of life--whereas less than 25% of the sample could hold as many as 3-4 items in mind at once at the younger ages, nearly half could do so by 12 months of age; (c) there was a marked recency effect (greater memory for the final item) for spans of 3 and 4 at all ages; and (d) there were modest cross-age correlations, indicating that individual differences in memory capacity showed some stability from age to age.     

Visual attention and temperament: Developmental data from the first 6 months of life

Infants were assessed longitudinally at 2, 4, and 6 months of age on a visual orienting task. Once engaged on a center stimulus, the latency to initiate a saccade to a peripheral stimulus was measured. The critical manipulation was whether, upon presentation of the peripheral stimulus, the center stimulus remained on (disengage trials) or was turned off (shift trials). Temperament was assessed using the Infant Behavior Questionnaire (IBQ). Latencies to shift attention decreased with age (i.e., 6 < 4 < 2 months.). A disengage–shift difference favoring shift trials was found at 2 months; this difference was only marginally significant at 4 and 6 months. At 6 months, ease of disengagement was associated with infants being more likely to smile and less likely to exhibit frustration. Our findings replicate and extend previous cross-sectional research by showing that the disengage operation undergoes a major developmental change within the first 4 months. Discussion focuses on the relationship between attentional disengagement and the regulation of emotional states.