Correlation between maternal and infant cortisol varies by breastfeeding status

ObjectiveThe objective of this study was to examine associations of mother and infant salivary cortisol, measured three times over the course of a day, and assess whether these varied by breastfeeding status.MethodsWe conducted a cross-sectional study of 54 mothers and their infants aged 4–11 months. Mothers collected their own saliva and that of their infants upon awakening, 30 min after waking and at bedtime. Breastfeeding status was reported by mothers and cortisol level was measured in saliva in μg/dl using standard techniques. We used generalized linear models to evaluate relationships between maternal and infant cortisol levels, and assessed whether the relationship differed by breastfeeding status: formula only compared to partial and full breastfeeding, adjusting for infant sex, race, age, maternal education, and family income.ResultsThirty-four infants received formula only and 20 were either partially or fully breastfed. Breastfeeding was associated with higher household income, higher maternal education, and white race. Cortisol levels were higher among breastfed infants at all three time points. After adjustment, maternal cortisol levels were related with infant cortisol at bedtime only (regression estimate 0.06; 95% CI: 0.10, 1.1; p = 0.02). The adjusted association between bedtime maternal and infant cortisol was stronger among breastfeeding dyads than among formula-feeding dyads (regression estimate 1.0; 95% CI: 0.1, 2.0; p = 0.04 vs. 0.6; CI: −0.1, 1.3; p = 0.10). In addition, we assessed the influence of maternal education and household income in our adjusted model; income strengthened the observed association, whereas maternal education did not change the estimate.ConclusionsBreastfeeding mothers and infants had significant correlations for cortisol at bedtime, while formula-feeding dyads did not. These data suggest that several factors may contribute to cortisol synchrony observed in mother/infant dyads, including the transfer of cortisol in human milk, physical interaction such as skin-to-skin contact, and shared environment. In addition, our findings support household income as a possible contributor.     

Factor structure of the Eating Disorder Examination Questionnaire (EDE-Q) in male and female college athletes

The study explored the psychometric properties of the Eating Disorder Examination Questionnaire (EDE-Q) among 1637 university students. Participants were divided into male (n = 432) and female (n = 544) competitive athletes, and male (n = 229) and female (n = 429) comparison groups comprised of individuals who had not engaged in competitive sports for at least one year. All groups were subjected to confirmatory factor analysis (CFA) to test the fit of the published factor structure in this population, and then exploratory FA (EFA). A three-factor solution was the best fit for three out of four groups, with a two-factor solution providing best fit for the male comparison group. The first factor for all groups resembled a combined Shape and Weight Concern subscale. The factor structure among male and female competitive athletes was remarkably similar; however, non-competitive athletic/low activity males appear qualitatively different from other groups.     

Weight ratings of others: The effects of multiple target and rater features

The present study investigated factors that affect the subjective analysis of the weight of other individuals. Three hundred and thirty-three participants viewed figures varying in muscularity, adiposity, gender, and race. For each of the eighteen figures (targets), a 2 (rater gender: male, female) × 3 (rater race/ethnicity: Caucasian, African American, Hispanic) × 3 (target race/ethnicity: Caucasian, African American, Hispanic) repeated measures ANCOVA was conducted (BMI was covaried). Overall, there were few significant effects, however, for some of the figural stimuli, African American raters assigned lower weight ratings than did Caucasian and Hispanic raters. The findings offer support for further investigation of ethnic differences in weight ratings as a potential factor that might inform ethnic differences in overweight and obesity prevalence.     

Aggressive driving in Romania: Psychometric properties of the Driving Anger Expression Inventory

The present research verified the psychometric properties of the Driving Anger Expression Inventory (DAX; Deffenbacher, Lynch, Oetting, & Swaim, 2002) on a Romanian sample (n = 262). Exploratory factor analysis revealed a three-factor structure: Verbal and Physical Aggressive Expression (α = .86), Adaptive/Constructive Expression (α = .88) and Using the Vehicle for Aggressive Expression (α = .83). The aggressive forms of expressing anger were summed up in the Total Driving Aggressive Expression Index (α = .90). Confirmatory factor analysis supported the three factors solution, by showing a good fit into a 30 items version of the DAX. All the aggressive forms of anger expression correlated positively with each other and with trait Aggression-Hostility, while the adaptive way of expressing anger correlated negatively with them, thus supporting the convergent validity of the DAX. Age differences were identified, in that younger drivers scored higher in Using the Vehicle for Aggressive Expression scale and in Total Driving Aggressive Expression Index, while older drivers scored higher in Adaptive/Constructive Expression scale. Several directions for future research concerning the DAX are suggested. Overall, our results showed that the Romanian version of the DAX is a valid tool for assessing aggressive driving.     

A bifactor model of subjective well-being: A re-examination of the structure of subjective well-being

The present research has aimed to extend the previous research on the structure of subjective well-being (SWB) by applying the bifactor model. The Satisfaction with Life Scale (SWLS) and the Positive and Negative Affect Schedule (PANAS) were administered to two large samples of Serbian young adults (N₁ = 1669, N₂ = 1522). The bifactor model of SWB with one general and three specific factors (life satisfaction, positive affect, and negative affect) provided the best fit to the data and outperformed the original three-factor model and the higher-factor model in both samples. The results supported the multidimensional nature of SWB, with a strong general factor underlying the SWLS and PANAS. Bifactor modeling has shown that SWLS and PANAS reflect both common and specific variance in SWB, with about half of the reliable variance in life satisfaction, positive affect, and negative affect being independent of the general factor. The present findings imply that researchers should be careful when interpreting SWLS and PANAS scores and that general SWB factor should be taken into account. Implications for scale scoring and interpretation, and theoretical conceptualization of SWB are discussed.     

Body checking and avoidance in ethnically diverse female college students

Although body checking and avoidance behaviors are common in women with eating disorders, minimal research has examined the nature or correlates of these behaviors in ethnically diverse female college students without eating disorders. Self-identified European American (n = 268), Asian American (n = 163), Latina (n = 146), and African American (n = 73) women completed self-report measures of body checking and avoidance, thin-ideal internalization, eating pathology, and clinical impairment. Results indicated that European and Asian American women reported significantly more body checking and avoidance than African American and Latina women. Generally, correlates of body checking and avoidance were consistent across ethnic groups: Regression analyses indicated that type of ethnicity predicted body checking and avoidance; and ethnicity, body checking, and body avoidance predicted eating pathology and clinical impairment. These associations suggest that body checking and avoidance are not benign behaviors in diverse nonclinical women.     

Are conservatives happier than liberals? Not always and not everywhere

Prior research has shown that conservatives report higher levels of subjective well-being than liberals (happiness gap). We investigate to what extent this phenomenon exists in different time periods within the United States (Study 1, N = 40,000) and in different countries (Study 2, N = 230,000). Consistent with our hypotheses grounded in the “shared reality” and person-culture fit literature, conservatives were happier and more satisfied with their lives than liberals to the extent that the conservative political ideology prevailed in their socio-cultural context, be it a specific time period in the U.S. or a specific country. These results show that the happiness gap between conservatives and liberals is less universal than previously assumed.     

The equivalence of the Child Behavior Checklist/1 1/2-5 across parent race/ethnicity, income level, and language

This study examined the equivalence of the Child Behavior Checklist/1 1/2-5 (CBCL/1 1/2-5) in 682 parents of 2- to 4-year-old children stratified by parent race/ethnicity (African American, Latino, and non-Latino White), family income (low vs. middle-upper), and language version (Spanish vs. English). Externalizing Scale means differed by income and child gender. Internalizing Scale means differed by income and parent race/ethnicity. Differential item analyses showed that few items functioned differently by racial/ethnic, language, and income group. A confirmatory factor analysis demonstrated that the Externalizing Scale provided a good fit with the data across racial/ethnic and income groups. However, model fit was improved for the Internalizing Scale when factor weights were allowed to vary. Findings support the equivalence of the CBCL/1 1/2-5 when used with parents of low-income preschool children from African American and Latino backgrounds, although further study of the factor structure for the Internalizing Scale is recommended.     

The associations of birth order with personality and intelligence in a representative sample of U.S. high school students

We tested birth order associations with personality traits and intelligence using Project Talent, a representative sample (N = 377,000) of U.S. high school students. Using a between-family design and several background factors (i.e., age, sex, sibship size, parental socio-economic status, and family structure), we were able to control for potential confounds, and estimate the links between birth order and outcomes across several different social categories. In addition to differences between firstborns and laterborns across the entire sample, we also tested birth rank trends in a sub-sample of targets from sibships of three, raised by two parents. Overall, the average absolute association between birth order and personality traits was .02, whereas the one between birth order and intelligence was .04.     

The factor structure and psychometric properties of the Italian version of the Acceptance of Cosmetic Surgery Scale

The current study examined the validity of the Italian version of the Acceptance of Cosmetic Surgery Scale (ACSS; Henderson-King & Henderson-King, 2005) in a sample of 378 Italian adult women. A series of confirmatory factor analyses were conducted. A three-factor solution provided the best fit to the data and confirmed the Intrapersonal, Social, and Consider dimensions. The three factors were strongly inter-correlated. Cronbach's alphas were high (all alphas > .86). The scale showed good convergent and discriminant validity (estimated by Composite Reliability and the Average Variance Extracted). The nomological validity of the Italian version of the ACSS was confirmed by its significant correlations with participants’ body dissatisfaction and sociocultural influences (internalization of thin ideals and perceived media pressure). The ACSS seems to be a useful measure of acceptance of cosmetic surgery in the Italian context. This instrument can be used with Italian speakers for research, health promotion, and preventive interventions.     

The dopamine D4 receptor gene,birth weight,maternal depression,maternal attention,and the prediction of disorganized attachment at 36 months of age: A prospective gene × environment analysis

BackgroundEfforts to understand the developmental pathways for disorganized attachment reflect the importance of disorganized attachment on the prediction of future psychopathology. The inconsistent findings on the prediction of disorganized attachment from the dopamine D4 receptor (DRD4) gene, birth weight, and maternal depression as well as the evidence supporting the contribution of early maternal care, suggest the importance of exploring a gene by environment model.MethodsOur sample is from the Maternal Adversity, Vulnerability, and Neurodevelopment project; consisting of 655 mother–child dyads. Birth weight was cross-referenced with normative data to calculate birth weight percentile. Infant DRD4 genotype was obtained with buccal swabs and categorized according to the presence of the 7-repeat allele. Maternal depression was assessed with the Center for Epidemiologic Studies Depression Scale at the prenatal, 6-, 12-, and 24-month assessments. Maternal attention was measured at 6-months using a videotaped session of a 20-min non-feeding interaction. Attachment was assessed at 36-months using the Strange Situation Procedure.ResultsThe presence of the DRD4 7-repeat allele was associated with less disorganized attachment, β = −1.11, OR = 0.33, p = 0.0008. Maternal looking away frequency showed significant interactions with maternal depression at the prenatal assessment, β = 0.003, OR = 1.003, p = 0.023, and at 24 months, β = 0.004, OR = 1.004, p = 0.021, as at both time points, women suffering from depression and with frequent looking away behavior had an increased probability of disorganized attachment in their child, while those with less looking away behavior had a decreased probability of disorganized attachment in their child at 36 months.ConclusionsOur models support the contribution of biological and multiple environmental factors in the complex prediction of disorganized attachment at 36 months.     

Factor structure of the Sociocultural Attitudes Towards Appearance Questionnaire-3 (SATAQ-3) among adolescent boys in China

There is considerable evidence that mass media portrayals of body image contribute to body dissatisfaction, yet the assessment of perceived media influences has been examined fleetingly in highly populated, non-Western cultures, particularly among young males. This research examined the factor structure of the Sociocultural Attitudes Towards Appearance Questionnaire-3 (SATAQ-3) among adolescent boys in China. In an initial exploratory factor analysis (N = 719), a four factor solution emerged with components reflecting General Pressure-Internalization, Sources of Appearance Information, Pressure-Internalization of an Athletic Ideal, and Pressure to be Thin. Subsequently, confirmatory factor analyses in a new sample (n = 749) assessed fits of the derived four factor model, a three factor variant, and alternatives reflecting “Western” and “Malay” SATAQ-3 solutions. The derived four factor solution had the most acceptable structure across several fit indices. Patterns of correlation with other self-report measures also provided preliminary support for the validity of the derived solution.     

The value of a purposeful life: Sense of purpose predicts greater income and net worth

Having a sense of purpose in life appears valuable across life domains, though it remains unclear whether purpose also provides financial value to individuals. The current study examined sense of purpose as a predictor of concurrent and longitudinal income and net worth levels, using two waves of the MIDUS sample of adults (N = 4660 across both assessments). Participants who reported a higher sense of purpose had higher levels of household income and net worth initially, and were more likely to increase on these financial outcomes over the nine years between assessments. Interaction tests suggested some evidence of age moderation, but gender did not appear to moderate the influence of purpose on economic outcomes.     

Latent mean comparisons on the BRIEF in preterm children: Parent and teacher differences

Executive function is a heterogeneous construct applied to cognitive capacities that together enable individuals to effectively engage in activities toward a purposive goal. Children born at extremely low birth weight (ELBW) are at risk of executive dysfunction on performance-based measures. In natural contexts, executive function may be described using such parental and teacher questionnaires as the Behavior Rating Inventory of Executive Function (BRIEF). This study examined the factor structure of the BRIEF-parent form in 124 ELBW children and of the BRIEF-teacher form in 90 ELBW children. Although our data showed that the fit of a two-factor structure was adequate for the parent report, a three-factor model provided advantages over the two-factor model across all fit indices and best characterized the data. For teacher report, these data supported a three-factor but not a two-factor model. Using the three-factor model for both groups of informants, we compared parent and teacher reports (n = 90 pairs) between the three identified latent variables. Parents reported significantly more difficulty with Emotional Regulation (p < .05), and teachers reported significantly more difficulty with Behavioral Regulation (p < .05). No significant differences were found between parent and teacher reports for Metacognition.     

Loneliness and solitude in adolescence: A confirmatory factor analysis of alternative models

The present study tested a four-factor model of adolescent loneliness and solitude that comprises peer-related loneliness, family loneliness, negative attitude toward solitude, and positive attitude toward solitude. Nine different instruments for a total of 14 scales and derivative subscales were completed by a sample of mid-adolescents (N = 534) from Grades 10 through 12 (aged 15–18 years) in the Dutch-speaking part of Belgium. As expected, the four-factor solution provided a better fit to the data than did alternative models that comprised just a single factor, or two and three factors. Use of the Loneliness and Aloneness Scale for Children and Adolescents (LACA) is recommended, because the instrument measures all four aspects of the model. Implications for current theories on adolescent loneliness and associated phenomena, such as adolescents’ attitude toward being on their own, are briefly discussed.     

Maternal postpartum depressive symptoms and infant externalizing and internalizing behaviors

Maternal postpartum depression has been shown to be one of the main predictors of externalizing and internalizing behaviors in toddlers and adolescents. Research suggests that presence of such behaviors can be observed as early as infancy. The current study uses longitudinal data from 247 mothers to examine the relationship between postpartum depressive symptoms at 8 weeks and the infant's externalizing and internalizing behaviors at 12 months. In unadjusted linear regression models, there were associations between postpartum depressive symptoms and infant externalizing behaviors (β = 0.082, SE = 0.032, p = 0.012) and internalizing behaviors (β = 0.111, SE = 0.037, p = 0.003). After controlling for potential confounding factors, including maternal age, race, education, home ownership, smoking status in the postpartum period, marital status, parenting stress, and happiness from becoming a parent, the associations between postpartum depressive symptoms and infant externalizing (β = 0.051, SE = 0.034, p = 0.138) and internalizing behaviors (β = 0.077, SE = 0.040, p = 0.057) were reduced and became non-significant. Furthermore, in these models the total amount of variance explained was 17.2% (p < 0.0001) for externalizing behaviors and 10.5% (p < 0.01) for internalizing behaviors; the only significant predictor of externalizing behaviors was maternal age (β = −0.074, SE = 0.030, p = 0.014), and of internalizing behaviors was white non-Hispanic ethnicity (β = −1.33, SE = 0.378, p = 0.0005). A combined effect of the confounding factors seems to explain the finding of no significant independent association between postpartum depressive symptoms and infant externalizing and internalizing behaviors.     

Personality and self-reported preference for music genres and attributes in a German-speaking sample

Research of music preferences yielded consistent results about the relationship of music preference, biographic variables, and personality. This study replicates some of these findings in a German-speaking sample (N = 1329). We conducted an online study using self-report assessments. We confirmed the five-factor structure of music genre preference and the three-factor structure of music attribute preference using EFA and CFA. In addition to previous research, we showed that the three-factor structure of music attribute preference is also replicated in self-reported assessments. We examined the relationships of personality and music preferences using SEM. This study contributes to the overall picture of music preference research and provides additional insights into the little-examined field of the relationship of music attribute preference and personality.     

Effects of different swimming race constraints on turning movements

The aim of this study was to investigate the effects of different swimming race constraints on the evolution of turn parameters. One hundred and fifty-eight national and regional level 200-m (meters) male swimming performances were video-analyzed using the individualized-distance model in the Open Comunidad de Madrid tournament. Turn (p < .001, ES = 0.36) and underwater distances (p < .001, ES = 0.38) as well as turn velocity (p < .001, ES = 0.69) significantly dropped throughout the race, although stroke velocity and underwater velocity were maintained in the last lap of the race (p > .05). Higher expertise swimmers obtained faster average velocities and longer distances in all the turn phases (p < .001, ES = 0.59), except the approach distance. In addition, national level swimmers showed the ability to maintain most of the turn parameters throughout the race, which assisted them in improving average velocity at the end of races. Therefore, the variations in the turning movements of a swimming race were expertise-related and focused on optimizing average velocity. Turning skills should be included in the swimming race action plan.     

The Spanish validation of the Short Health Anxiety Inventory: Psychometric properties and clinical utility

Background/ObjectiveThe Short Health Anxiety Inventory (SHAI) is a widely used self-report instrument to evaluate health anxiety. To assess the SHAI's factor structure, psychometric properties, and accuracy in differentiating Spanish non-clinical individuals from patients with severe health anxiety or hypochondriasis.MethodA total of 342 community participants (61.6% women; M_age = 34.60, SD = 14.91) and 31 hypochondriacal patients (51.6% women; M_age = 32.74, SD = 9.69) completed the SHAI and other self-reports assessing symptoms of hypochondriasis, depression, anxiety sensitivity, worry, and obsessive-compulsive.ResultsThe original two-factor structure was selected as the best structure, based on its parsimony and empirical support (Factor 1: Illness likelihood; Factor 2: Negative consequences of illness). Moreover, the Spanish version of the SHAI demonstrated good construct and concurrent and discriminant validity, and internal consistency. A cutoff of 40.5 (total score) accurately distinguished non-clinical individuals from patients with severe health anxiety or hypochondriasis.ConclusionsThe SHAI is an adequate screening instrument to measure health anxiety in Spanish-speaking community adults.     

“To g or not to g?” — Analysis of the dimensional structure of a cognitive abilities’ battery

Over the past century there has been an extensive debate in Psychology over whether intelligence structure is best represented through a single general ability, multiple specific abilities, or a hierarchical structure of abilities. This study aims at contributing to this debate through an analysis of the dimensional structure of a cognitive abilities’ battery aiming to evaluate, in combination, differentiated cognitive processes of increasing complexity (comprehension, reasoning, and problem solving) through items of different contents (verbal, numerical, and spatial). A Portuguese representative sample of 2546 adolescents enrolled in secondary education participated in the study. Confirmatory factor analyses were carried out and the results showed that: (1) the hierarchical model is the only presenting an acceptable fit to the data (RMSEA = .07; CFI = .96; TLI = .92), (2) the existence of specific factors cannot be neglected, and (3) contents of the subtests assume relevance to explain the levels of adolescents’ cognitive performance. These results are discussed taking into account the contribution of school experience for the development and differentiation of adolescents’ cognitive abilities.