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Research Examining (research + examining)
Selected AbstractsAnnotation: Recent Research Examining the Role of Peer Relationships in the Development of PsychopathologyTHE JOURNAL OF CHILD PSYCHOLOGY AND PSYCHIATRY AND ALLIED DISCIPLINES, Issue 5 2001Kirby Deater-Deckard This Annotation highlights recent research on the role of peer group and friendship factors in the development of psychopathology in childhood and adolescence. Several processes are considered, including peer rejection (e.g., exclusion and victimization), social withdrawal and avoidance of peer interaction, and the socialization of deviant behavior and internalizing problems. The mediating influences of several proximal components are examined, including cognitive-perceptual factors and emotion regulation. In addition, the moderating ifluences of close friendship, age, gender, ethnicity, and group norms are considered. Several promising avenues for future directions in research are highlighted, including the examination of heterogeneity in developmental processes, further investigation of gender-based norms, and the application of multi-level modeling techniques and gene-environment process models. [source] Posterior cingulate activation during moral dilemma in adolescentsHUMAN BRAIN MAPPING, Issue 8 2008Jesus Pujol Abstract Neuroimaging research examining correlates of adolescent behavioral maturation has focused largely on issues related to higher cognitive development. Currently few studies have explored neural correlates of emotional reactivity in adolescent groups. In this study, we sought to examine the nature of posterior cingulate activation during situations of moral dilemma in normal adolescents. We focused on this region because of emerging evidence that suggests its role in emotionally self-relevant mental processing. Ten healthy teenagers, aged from 14 to 16 years, underwent three fMRI sequences designed to examine (i) brain responses during moral dilemma; (ii) brain responses during passive viewing of the moral dilemma outcome; and (iii); "deactivation" during a simple cognitive task compared with resting-state activity. Our main finding was that during moral dilemma, all subjects showed significant activation of the posterior cingulate cortex, and more variable activation of the medial frontal cortex and angular gyrus. Interestingly, these findings were replicated in each subject using the passive viewing task, suggesting that the previous pattern was not specific to moral reasoning or decision making. Finally, six of the ten subjects showed deactivation of the same posterior cingulate region during the cognitive task, indicating some commonality of function between posterior cingulate activity during moral dilemmas and rest. We propose that these posterior cingulate changes may relate to basic neuronal activities associated with processing self-relevant emotional stimuli. Given the high single-subject reproducibility of posterior cingulate activations, our findings may contribute to further characterize adolescent emotional reactivity in developmental neuroimaging studies. Hum Brain Mapp, 2008. © 2007 Wiley-Liss, Inc. [source] When the means justify the ends: effects of observability on the procedural fairness and distributive fairness of resource allocationsJOURNAL OF BEHAVIORAL DECISION MAKING, Issue 4 2006Rebecca W. Hamilton Abstract While there is substantial research examining how recipients react to allocations that vary in procedural fairness (Colquitt, Conlon, Wesson, Porter, & Ng, 2001), previous research has not examined how those dividing resources among themselves and others manipulate procedural fairness (Tyler & Smith, 1998). In this paper, we introduce a measure that allows us to compare procedural fairness across resource allocations, and we use an experimental procedure in which participants vary the procedural fairness of their allocations. In three studies, we show that those dividing resources make proactive tradeoffs between distributive and procedural fairness. Participants increased the procedural fairness of their allocations when they knew recipients would observe their procedures, but they were less likely to divide the resources equally among recipients. The decreased emphasis on distributive fairness when procedures were observable resulted in higher joint outcomes, suggesting that the observability of procedures has important implications for the efficiency of resource allocation in groups. Copyright © 2006 John Wiley & Sons, Ltd. [source] Cognitive Efficiency in Stimulant Abusers With and Without Alcohol DependenceALCOHOLISM, Issue 3 2003Andrea Lawton-Craddock Background: Although previous studies have found stimulant (i.e., cocaine, methamphetamine) abusers and alcoholics to have neuropsychological deficits, research examining which cognitive abilities are most affected by concurrent exposure to these substances is lacking. To address this issue, detoxified men and women who met criteria for dependence of (a) alcohol only (ALC) (n= 15); (b) stimulants only (STIM) (n= 15); and (c) both alcohol and stimulants (A/STIM) (n= 15) were compared with age- and education-matched community controls (n= 15). Methods: Tasks that measured visual spatial skills, problem-solving and abstraction, short-term memory, cognitive flexibility, and gross motor speed were administered to participants. For each test, both speed and accuracy were assessed and an efficiency ratio (accuracy/time) was derived. Based on an average of these efficiency ratios, an overall performance index of cognitive efficiency was obtained. Results: Overall, controls performed more efficiently than all other groups. However, they were statistically significantly better only in relation to the A/STIM and STIM groups (p < 0.01). Individual comparisons revealed that the ALC group performed significantly better than the STIM group, although the ALC group did not differ from either the control or A/STIM groups (p, 0.05). This pattern of results was relatively consistent across the individual subtests of problem-solving/abstraction, short-term memory, and cognitive flexibility. Conclusions: As expected, substance abuse was associated with cognitive inefficiency. More importantly, these findings suggest that the cognitive effects of chronic stimulant abuse are not additive with those of alcohol abuse. That is, singly addicted stimulant abusers demonstrated similar or greater neurocognitive impairments than individuals who abuse alcohol and stimulants concurrently. The reason for this pattern is speculative but may be attributed to alcohol's opposing actions on cerebrovascular effects brought on by stimulant abuse. [source] Comparison of the play of children with attention deficit hyperactivity disorder by subtypesAUSTRALIAN OCCUPATIONAL THERAPY JOURNAL, Issue 2 2010Reinie Cordier Background:,Studies have found differences in the nature and severity of social problems experienced by children with different subtypes of attention deficit hyperactivity disorder (ADHD). Given that play is often the context for acquiring social skills, there is surprisingly limited research examining whether these differences distinguish the play of children within the groups. Methods:,Using the Test of Playfulness (ToP), we examined the similarities and differences in play between children (aged 5,11 years) diagnosed with the threeDSM-IV ADHD subtypes: inattentive (I-subtype;n = 46), hyperactive-impulsive (HI-subtype;n = 28) and combined subtypes (C-subtype;n = 31). Results and conclusions:,Bias interaction, an item-by-item analysis, revealed that the hierarchy of ToP items was similar for children with the HI- and C-subtypes, but differed for children with the I-subtype. Specifically, children with the I-subtype found it more difficult to become intensely engaged in play and to take on playful mischief and clowning; however, they found social play items to be easier. Conversely, whereas mischief and clowning were relatively easier for children with the HI- and C-subtypes, many items reflecting social interaction were more difficult. These findings suggest that interventions can be tailored to these differing presentations. However, further research is needed to confirm the findings. [source] Neural activation during encoding of emotional faces in pediatric bipolar disorderBIPOLAR DISORDERS, Issue 7 2007Daniel P Dickstein Objective:, Neurobiological understanding of bipolar disorder (BD) is limited by a paucity of functional magnetic resonance imaging (fMRI) research examining correlates of psychological processes. To begin to address these limitations, the current study tests the hypothesis that pediatric BD (PBD) subjects exhibit altered neural activation during encoding of emotional faces compared to typically developing controls. Methods:, Pediatric BD subjects (n = 23; mean age = 14.2 ± 3.1 years) and controls (n = 22; mean age = 14.7 ± 2.3 years) were matched on age, gender, and IQ. In this event-related fMRI study, subjects were scanned while viewing emotional faces and given a surprise recognition memory test 30 min postscan. Our main outcome measure was between-group differences in neural activation during successful versus unsuccessful face encoding. Results:, Pediatric BD youth exhibited reduced memory for emotional faces, relative to healthy comparisons, particularly on fearful faces. Event-related fMRI analyses controlling for this behavioral difference showed that PBD subjects, compared to controls, had increased neural activation in the striatum and anterior cingulate cortex when successfully encoding happy faces and in the orbitofrontal cortex when successfully encoding angry faces. There were no between-group differences in neural activation during fearful face encoding. Conclusions:, Our results extend what is known about memory and face emotion processing impairments in PBD subjects by showing increased fronto-striatal activation during encoding of emotional faces. Further work is required to determine the impact of mood state, medication, and comorbid illnesses on these findings. 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