Frontal cortex functioning in the infant broader autism phenotype

Atypical attention has been proposed as a marker of the broader autism phenotype. In the present study we investigated this and the related process of inhibitory control at the youngest possible age through the study of infant siblings of children with an autism spectrum disorder (Sibs-ASD). Both attention and inhibition have been related to the frontal cortex of the brain. Nine- to ten-month-old Sibs-ASD and low-risk control infants completed the Freeze-Frame task, in which infants are encouraged to inhibit looks to peripherally presented distractors whilst looking at a central animation. The attractiveness of the central stimulus is varied in order to investigate the selectivity of infants’ responses. In line with previous studies, it was found that a subset of Sibs-ASD infants had difficulty disengaging attention from a central stimulus in order to orient to a peripheral stimulus. The Sibs-ASD group also showed less Selective Inhibition than controls. However, Sibs-ASD infants did demonstrate Selective Inhibitory Learning. These results provide preliminary evidence for atypical frontal cortex functioning in the infant broader autism phenotype.     

Perfectionism and Depression Among Low-Income Chronically Ill African American and White Adolescents and Their Maternal Parent

Most research on perfectionism is based on convenience samples of university students or clinically distressed samples, and therefore relatively less is known about the development and implications of perfectionism for other groups. In this study, we examined perfectionism and depression in low-income African American (n = 39) and White (n = 55) adolescents with chronic illnesses (most with diabetes, asthma, and/or hypertension) and their primary parents. We specifically examined the association between parent and child perfectionism, and the link between perfectionism and depression in both groups. The African American adolescents reported significantly more maladaptive perfectionism than did the White adolescents, and the African American parents reported significantly higher scores on depression than did the White parents. Correlations and regression analyses revealed similarities and differences in perfectionism-depression associations that might be explained in light of cultural differences and the unique physical and emotional challenges faced by youth with chronic illnesses. The word “parent” in this study is used to represent a parent or other adult who was identified as a primary caregiver for the adolescent.     

Distinguishing automatic and controlled components of attitudes from direct and indirect measurement methods

Distinct automatic and controlled processes are presumed to influence social evaluation. Most empirical approaches examine automatic processes using indirect methods, and controlled processes using direct methods. We distinguished processes from measurement methods to test whether a process distinction is more useful than a measurement distinction for taxonomies of attitudes. Results from two studies suggest that automatic components of attitudes can be measured directly. Direct measures of automatic attitudes were reports of gut reactions (Study 1) and behavioral performance in a speeded self-report task (Study 2). Confirmatory factor analyses comparing two-factor models revealed better fits when self-reports of gut reactions and speeded self-reports shared a factor with automatic measures versus sharing a factor with controlled self-report measures. Thus, distinguishing attitudes by the processes they are presumed to measure (automatic versus controlled) is more meaningful than distinguishing based on the directness of measurement.     

Helping Children and Caregivers Cope with Repeated Invasive Procedures: How Are We Doing?

This paper discusses recent developments in the medical and psychological management of child behavioral distress during invasive (i.e., needle stick) procedures for diagnosis and treatment of chronic pediatric disorders. Along with a review of relevant studies from the medical, pediatric psychology and behavior analysis literatures, representative data are presented from recent research on pediatric procedural pain management. The impact of increasing use of implanted subcutaneous intravenous catheters (ports) and decreased reliance on intravenous cannulation is discussed. Similarly, the effects (and limitations) of more frequent use of topical anesthesia to prepare needle sites also are presented. The continuing need for adjunctive, nonpharmacological (i.e., cognitive and behavioral) interventions for procedural pain is emphasized, and recent studies on distraction and counter-conditioning-based treatments are described. Future research is encouraged on (1) behavioral interventions in relation to day-to-day contextual variables that modulate treatment effects and (2) the development of efficient screening measures to identify children and families who are least likely to cope effectively with repeated procedures, allowing them to be given greater priority for allocation of limited resources for psychosocial intervention.     

Serotonin: Modulator of a drive to withdraw

Serotonin is a fundamental neuromodulator in both vertebrate and invertebrate nervous systems, with a suspected role in many human mental disorders. Yet, because of the complexity of serotonergic function, researchers have been unable to agree on a general theory. One function suggested for serotonin systems is the avoidance of threat. We propose and review evidence for an alternative hypothesis, that a phylogenetically primitive of function of serotonin is to oppose the activating neuromodulators (particularly noradrenalin and dopamine). The functional effect of this opposition can be seen as applying a drive to withdraw from dangerous, aversive or high stimulation environments. Proposing that serotonin is involved in a drive to withdraw and seek contentment, instead of a drive to avoid, may be compatible with several lines of evidence on serotonin function and may facilitate a better understanding of serotonergic neuromodulation in human psychopathology.     

Relationship commitment and its implications for unprotected sex among impoverished women living in shelters and low-income housing in Los Angeles County.

OBJECTIVE: To examine how relationship commitment among impoverished women is associated with their frequency of unprotected sex. DESIGN: Cross-sectional analyses were conducted on survey data from a probability sample of 445 women initially sampled from shelters and low-income housing in Los Angeles County. MAIN OUTCOME MEASURE: Frequency of unprotected sex in a typical month was derived as the product of 2 items: how often the woman had sex with her partner in a typical month and how often a male condom was used. RESULTS: For both sheltered and housed women, relationship commitment predicted more frequent engagement in unprotected sex with their partner, even after controlling for the type of relationship (primary vs. casual). However, this association could not be accounted for by perceived partner monogamy, ability to refuse unwanted sex, perceived HIV susceptibility, and condom use self-efficacy. Among housed women only, never asking the partner to use a condom partially accounted for more frequent engagement in unprotected sex among women with stronger relationship commitment. CONCLUSION: Results emphasize the importance of relationship commitment issues in HIV prevention interventions with impoverished women, and the need for a better understanding of relationship commitment and its influence on condom use in this population.     

Interethnic Relations on Campus: Can't We All Get Along?

This study examined the ethnic climate and relationships between ethnic groups at 5 colleges. Data indicate that White and Latino students were the most comfortable interacting with other ethnic groups, whereas Asians students were the least comfortable. Furthermore, White students had a relatively positive view of the interracial climate in contrast to Black students who described their campuses as more hostile and uninviting.     

Approximate uniqueness estimates for singular correlation matrices

The residual variance (one minus the squared multiple correlation) is often used as an approximation to the uniqueness in factor analysis. An upper bound approximation to the residual variance is given for the case when the correlation matrix is singular. The approximation is computationally simpler than the exact solution, especially since it can be applied routinely without prior knowledge as to the singularity or nonsingularity of the correlation matrix.