Parent and actometer measures of motor activity level in the young infant

Motor activity level is one dimension of infant temperament for which parental judgment can be validated against a truly independent criterion. Two studies were conducted, the first involving a 27-min sample of behavior in a structured, attention-getting situation, and the second involving a 24-hr sample of in-home behavior. In both studies, parent perception of the 3- or 4-month-old as measured by the Activity Level (AL) scale of the Rothbart Infant Behavior Questionnaire was compared to the composited readings from four mechanical motion recorders (actometers) worn, one per limb, by the infant. The AL scale did not correlate with the actometer measure, r=.05 and R=.00, and the expected convergence of the 3-month version of the IBQ activity scale with its mechanical counterpart was not found. In the 24-hr study, birth order and ponderal index were significantly correlated with 24-hr actometer scores; first-borns and thin infants were most active.     

Mood regulation expectancies, affect intensity, dispositional coping, and depressive symptoms: A conceptual analysis and empirical reanalysis

In a recent article, Flett, Blankstein and Obertinsky (1996, Personality and Individual Differences, 20, 221–228) examined cross-sectional relations between affect intensity, generalized expectancies for negative mood regulation (NMR expectancies), coping dispositions, and depression in a sample of 153 women. However, they did not report partial correlations of affect intensity and NMR expectancies, independent of each other, with coping and depression. Such information is needed for development of models of the coping process which integrate the roles of temperament variables, such as affect intensity, and cognitive-social learning person variables, such as NMR expectancies. Reanalysis of Flett etal.'s correlation matrix revealed that affect intensity and NMR expectancies were each independently associated with distinct coping dispositions, but that only NMR expectancies were independently associated with depressive symptoms.     

Attachment,temperament, and ego development in young adulthood

Attachment and temperament have each been thought to contribute to personality development; however, few empirical studies have examined the relations between the two. Thus, the purpose of this study was to investigate, in young adulthood, the relations among attachment, temperament, and two aspects of ego development, namely,overall ego development and ego development with respect tointimacy. One hundred and seven college students served as participants. Sixty one percent classified themselves as securely attached and 39% as insecurely attached. A factor analysis of the Emotionality-Activity-Sociability (EAS) Temperament Survey for Adults yielded a primary factor (labeled negative emotionality) that accounted for 41% of the variance. A regression analysis then revealed that both attachment status and temperament predicted overall ego development; however, only attachment status predicted ego development with respect to intimacy. Implications and directions for future research are discussed.     

Matching adolescents with foster mothers and fathers: An evaluation of the role of temperament

We tested the notion that better foster care adjustment would be observed when the temperaments of mothers and fathers were matched with those of adolescent foster children. We hypothesized that families in which foster parents and foster children had high (easy) scores on subscales of the Revised Dimensions of Temperament Scale (DOTS-R) would also report higher family functioning and higher foster care adjustment than parents and children from families in which one or both family members had low (difficult) scores on these scales. The hypotheses were supported when the mothers and fathers family assessments were used but rejected when the observations of the case managers and adolescents were tested. Methodological and substantive explanations for the findings are discussed and recommendation for foster care practice and continuing research are provided.     

2~3岁幼儿执行功能与母子互动的关系:幼儿气质的调节作用

研究考察幼儿气质与母子互动质量对执行功能的作用。160名2~3岁幼儿及其母亲（主要抚养者）完成了亲子互动任务,然后幼儿完成工作记忆、认知灵活性与抑制控制的测查任务。结果发现母子互动质量对幼儿认知灵活性有显著预测作用,幼儿努力控制负向调节母子互动与认知灵活性的关系,即幼儿努力控制维度得分越高,母子互动对幼儿认知灵活性的作用越小。研究表明幼儿气质与亲子互动质量的交互作用解释幼儿执行功能的发展水平。     

Inhibitory control and set shifting describe different pathways from behavioral inhibition to socially anxious behavior

Individuals with a behaviorally inhibited (BI) temperament are more likely to develop social anxiety. However, the mechanisms by which socially anxious behavior emerges from BI are unclear. Variation in different forms of top‐down control, specifically executive functions (EF), may play distinct roles and characterize differential pathways to social anxiety. Here 291 children were assessed for BI in toddlerhood (ages 2 and 3), parent‐reported inhibitory control and set shifting during middle childhood (age 7), and multidimensional assessment of socially anxious behavior completed during late childhood and early adolescence (ages 9 and 12). Structural equation modeling revealed that early variation in BI predicted the development of socially anxious behavior through either higher levels of parent‐reported inhibitory control or lower levels of parent‐reported set shifting. These data reinforce the notion that top‐down control does not uniformly influence relations between temperament and socially anxious behavior. These data suggest novel approaches to thinking about the role of EFs and social anxiety outcomes as children approach adolescence.     

Associations of temperament and personality traits with frequency of physical activity in adulthood

Temperament and physical activity (PA) have been examined in children and adolescents, but little is known about these associations in adulthood. Personality traits, however, are known to contribute to PA in adults. This study, which examined both temperament and personality characteristics at age 42 in relation to frequency of PA at age 50 (JYLS, n = 214–261), also found associations with temperament traits. Positive associations were found between Orienting sensitivity and overall PA and between Extraversion and vigorous PA among women and between low Negative affectivity and overall and vigorous PA among men. Furthermore, Orienting sensitivity and Agreeableness were associated with vigorous PA among men. Temperament and personality characteristics also showed gender-specific associations with rambling in nature and watching sports.     

Cerebral blood flow in 5‐ to 8‐month‐olds: Regional tissue maturity is associated with infant affect

Infancy is marked by rapid neural and emotional development. The relation between brain function and emotion in infancy, however, is not well understood. Methods for measuring brain function predominantly rely on the BOLD signal; however, interpretation of the BOLD signal in infancy is challenging because the neuronal‐hemodynamic relation is immature. Regional cerebral blood flow (rCBF) provides a context for the infant BOLD signal and can yield insight into the developmental maturity of brain regions that may support affective behaviors. This study aims to elucidate the relations among rCBF, age, and emotion in infancy. One hundred and seven mothers reported their infants' (infant age M ± SD = 6.14 ± 0.51 months) temperament. A subsample of infants completed MRI scans, 38 of whom produced usable perfusion MRI during natural sleep to quantify rCBF. Mother‐infant dyads completed the repeated Still‐Face Paradigm, from which infant affect reactivity and recovery to stress were quantified. We tested associations of infant age at scan, temperament factor scores, and observed affect reactivity and recovery with voxel‐wise rCBF. Infant age was positively associated with CBF in nearly all voxels, with peaks located in sensory cortices and the ventral prefrontal cortex, supporting the formulation that rCBF is an indicator of tissue maturity. Temperamental Negative Affect and recovery of positive affect following a stressor were positively associated with rCBF in several cortical and subcortical limbic regions, including the orbitofrontal cortex and inferior frontal gyrus. This finding yields insight into the nature of affective neurodevelopment during infancy. Specifically, infants with relatively increased prefrontal cortex maturity may evidence a disposition toward greater negative affect and negative reactivity in their daily lives yet show better recovery of positive affect following a social stressor.