Serial dependence in position occurs at the time of perception

Observers perceive objects in the world as stable over space and time, even though the visual experience of those objects is often discontinuous and distorted due to masking, occlusion, camouflage, or noise. How are we able to easily and quickly achieve stable perception in spite of this constantly changing visual input? It was previously shown that observers experience serial dependence in the perception of features and objects, an effect that extends up to 15 seconds back in time. Here, we asked whether the visual system utilizes an object’s prior physical location to inform future position assignments in order to maximize location stability of an object over time. To test this, we presented subjects with small targets at random angular locations relative to central fixation in the peripheral visual field. Subjects reported the perceived location of the target on each trial by adjusting a cursor’s position to match its location. Subjects made consistent errors when reporting the perceived position of the target on the current trial, mislocalizing it toward the position of the target in the preceding two trials (Experiment 1). This pull in position perception occurred even when a response was not required on the previous trial (Experiment 2). In addition, we show that serial dependence in perceived position occurs immediately after stimulus presentation, and it is a fast stabilization mechanism that does not require a delay (Experiment 3). This indicates that serial dependence occurs for position representations and facilitates the stable perception of objects in space. Taken together with previous work, our results show that serial dependence occurs at many stages of visual processing, from initial position assignment to object categorization.     

Use of Out-of-Home Care Among a Statewide Population of Children and Youth Enrolled in Medicaid

System-wide research on the use of out-of-home care among children and youth is needed to inform the development of policies and services. We used Medicaid claims from North Carolina to examine patterns of out-of-home care, identify demographic and diagnostic differences between those who received care in residential treatment, psychiatric hospitals, or general hospitals, and determine whether demographic or diagnostic characteristics were associated with having more than one out-of-home stay during the year. Among those who received out-of-home care during a 1 year period, 36% received care in residential treatment only, 32.4% in general hospitals only, and 17.6% in psychiatric hospitals only, while 14.0% used more than one sector of out-of-home care. Boys, teenagers, and youth in foster care or diagnosed with emotional disturbance or hyperkinetic syndrome had higher odds of receiving care in residential treatment only whereas girls, youth age 19–21, and those with depressive and stress and adjustment disorders had higher odds of receiving care from hospitals only. Teenagers and youth in foster care had higher odds of having more than one stay. Among those with more than one stay, there were 300 patterns of care and nearly half received care from more than one service sector. The implications for services and policy are discussed. Further research is needed to understand patterns of out-of-home care and the factors that influence placement decisions.     

Neural and behavioral effects of interference resolution in depression and rumination

Individuals diagnosed with major depressive disorder (MDD) often ruminate about their depression and their life situations, impairing their concentration and performance on daily tasks. We examined whether rumination might be due to a deficit in the ability to expel negative information from short-term memory (STM), and fMRI was used to examine the neural structures involved in this ability. MDD and healthy control (HC) participants were tested using a directed-forgetting procedure in a short-term item recognition task. As predicted, MDD participants had more difficulty than did HCs in expelling negative, but not positive, words from STM. Overall, the neural networks involved in directed forgetting were similar for both groups, but the MDDs exhibited more spatial variability in activation in the left inferior frontal gyrus (a region critical for inhibiting irrelevant information), which may contribute to their relative inability to inhibit negative information.     

The historical context of G. Stanley Hall's Adolescence (1904)

G. Stanley Hall's magnum opus, Adolescence, published in 1904 in two hefty volumes I herein submit to historical analysis. I am concerned with how it did "fit" into the notions and practices of the larger culture as well as into the discourses of science and of child nurture of that time. There is plenty of evidence of Hall's ethnic, racial, and gender attitudes as expressed in the book being typical of the white, Anglo-Saxon Protestant middle class stratum to which he belonged. His discussions of the extant discourses of science and of child nurture show a man quite conversant with these discourses, and not merely in American and British, but also in French and German publications as well. Probably any book, idea, or historical circumstance or phenomenon is chiefly a historical artifact, and we should not bend it much to "prove" that it is in any important sense a part of a different age. It is one thing to say that a certain idea has a contemporary resonance; to claim there is a straight line from it to today is problematic and meaningless.     

What are theories for? Concept use throughout the continuum of dinosaur expertise

Although it is now well established that object concepts are situated within broader systems of theoretical knowledge, it is less clear how theories influence the use of object concepts at various points throughout the continuum of expertise. Two studies were conducted to investigate the impact of specific theories (concerning dinosaurs) and overarching framework theories (of biology) on children's and adults' performance on categorization tasks involving familiar and less familiar concepts. Although expertise increased the quantity of deep feature knowledge possessed by children and increased their understanding of biologically adaptive relations among features, few aspects of children's performance generalized beyond highly familiar dinosaurs. Children's specific theories related to dinosaurs were empirically constrained and relatively dissociated from other types of biological knowledge. The interaction of specific concept knowledge with broader framework theories of biology throughout the continuum of expertise is considered.     

Parenting Competency Across Pregnancy and Postpartum Among Urban Minority Women

Taking a life-course perspective, we explored the sense of parenting efficacy during the pregnancy-postpartum transition among a group under-represented in much of adult developmental research, minority women. Our intent was to describe the women's report of parenting competency in a major life transition occurring within the context of an impoverished urban environment. We also explored associations with depression, social support, and life events. One hundred and eighty-two African-American and Hispanic mothers at community health centers in low-income urban areas completed measures early in the third trimester and again at 3 months postpartum. Across time, the levels of reported parental efficacy and satisfaction increased while depressive symptoms decreased. Negative life events and levels of depressive symptomatology differentially influenced women's experience of parenting satisfaction and efficacy feelings before and after their babies were born.     

Fear information and social phobic beliefs in children: a prospective paradigm and preliminary results

This paper presents a first attempt to develop a prospective paradigm to test Rachman's (Behav. Res. Ther. 15 (1977) 375) theory of fear acquisition for social fears. Following the prospective paradigm for animal fears developed by Field et al. (Behav. Res. Ther. 39 (2001) 1259) an attempt is made to adapt this paradigm to look at the effect of fear information in the development of social fears. A large group of normal children (N=135) who were at an age (10-13 years) at which social concerns are most pertinent were tested using this paradigm. They were given positive, negative or neutral information about three social situations: public speaking, eating in public, and meeting a new group of children. Children's fear beliefs were measured before and after the information was given and the information was given by a teacher, a same age peer or no information was given (a control). The results indicate that although information can change social fear beliefs it is dependent upon the type of social activity and who provides the information. The implications of these initial results for our understanding of both the role of fear information in the development of social fear beliefs, and the limitations of this current paradigm are discussed.     

Children's face recognition memory: more evidence for the cross-race effect

It is well established that own-race faces are recognized more accurately than cross-race faces. However, there are mixed results regarding the developmental consistency of the cross-race effect White and Black kindergarten children, 3rd graders, and young adults viewed a Black and a White target individual. One day later, recognition memory for each target was tested with a 6-person lineup. The interaction of race of participant by race of target face on Ag scores was significant, demonstrating an overall cross-race effect. The 2nd-order interaction with age did not approach significance; for each age group, own-race identification was more accurate than cross-race identification. The age consistency of the cross-race effect in light of the significant main effect of age suggests quantitative but not qualitative differences in face memory processing at various ages. For children, as well as adults, own-race faces are recognized more accurately than cross-race faces.     

Telephone-administered cognitive behavior therapy for obsessive-compulsive disorder

Exposure with response prevention and cognitive behavior therapy are widely recognized as effective treatments for obsessive-compulsive disorder. Unfortunately, many people with obsessive-compulsive disorder--particularly those living in rural areas--do not have access to therapists providing these treatments. Accordingly, we investigated the efficacy of telephone-administered cognitive behavior therapy for obsessive-compulsive disorder. Two open trials are reported, for a total of 33 people with obsessive-compulsive disorder (without major depression). The first trial consisted of 12 weeks on a waiting list followed by 12 weeks of treatment (delayed treatment). The second trial consisted of 12 weeks of immediate treatment. Obsessive-compulsive symptoms did not change during the waiting period. Symptoms declined from pre- to post-treatment, with gains maintained at 12-week follow-up. For the pooled sample our pre-to-post-treatment effect size was as large or larger than those obtained in other studies of reduced contact treatment, and similar to those of face-to-face exposure with response prevention. Our proportion of treatment dropouts tended to be lower than those of other reduced contact interventions. The results suggest that telephone-administered cognitive behavior therapy is effective and well-tolerated, at least for people with obsessive-compulsive disorder without major depression. It remains to be seen whether this treatment is safe and effective when comorbid major depression is present.