Visual search in typically developing toddlers and toddlers with Fragile X or Williams syndrome

Visual selective attention is the ability to attend to relevant visual information and ignore irrelevant stimuli. Little is known about its typical and atypical development in early childhood Experiment 1 investigates typically developing toddlers' visual search for multiple targets on a touch-screen. Time to hit a target, distance between successively touched items, accuracy and error types revealed changes in 2- and 3-year-olds' vulnerability to manipulations of the search display. Experiment 2 examined search performance by toddlers with Fragile X syndrome (FXS) or Williams syndrome (WS). Both of these groups produced equivalent mean time and distance per touch as typically developing toddlers matched by chronological or mental age; but both produced a larger number of errors. Toddlers with WS confused distractors with targets more than the other groups; while toddlers with FXS perseverated on previously found targets. These findings provide information on how visual search typically develops in toddlers, and reveal distinct search deficits for atypically developing toddlers.     

The role of risk avoidance in anxiety

Various forms of disinhibitory psychopathology (e.g., substance use disorder) are characterized by a tendency to make overly risky decisions. The current paper reports on data suggesting that, in contrast, anxiety is associated with an exaggerated tendency to engage in risk-avoidant decision making. In a nonclinical sample of university students, trait anxiety was associated with relatively low willingness to take risks, across a range of behavioral contexts. Trait anxiety was also associated with pessimistic risk appraisals (e.g., heightened perceptions of the likelihood and severity of negative outcomes). Furthermore, these associations were apparent while controlling for depression. Additional findings suggest that heightened perceptions of the severity of negative outcomes might mediate the link between trait anxiety and risk avoidance. This research has implications for understanding the role basic risk decision-making processes may play in the nature and treatment of anxiety.     

Anhedonia and emotional numbing in combat veterans with PTSD

We explored relationships between anhedonia and posttraumatic stress disorder (PTSD) symptom clusters, including their role in predicting psychiatric comorbidity. Our measure of anhedonia was derived from an examination of the latent structure of the Beck Depression Inventory. We found evidence for a two-factor solution, leading to anhedonia and undifferentiated, global depressive symptoms scales. In primary analyses, anhedonia had a unique positive relationship with PTSD's emotional numbing symptoms and minimal relationships with other PTSD symptoms. Upon examining the incremental validity of appetitive functioning (i.e., anhedonia, emotional numbing) over and above aversive functioning (i.e., re-experiencing, avoidance, and hyper-arousal PTSD symptoms) variables, greater emotional numbing increased the likelihood of being diagnosed with a major depressive disorder, and greater anhedonia increased the likelihood of being diagnosed with additional anxiety disorders and to a lesser extent, psychotic disorders. Results were consistent with research on the distinction of appetitive and aversive functioning, providing insight into the nature of PTSD.     

Enhancing frequency recording by developmental disabilities treatment staff

We evaluated a staff training and management package for increasing accuracy of recording frequency of problem behavior in a residential care facility. A multiple baseline design across the first and second work shifts showed that 2 of 8 participants increased their accuracy following in-service training, and all 8 improved during a condition with supervisor presence and feedback. Improvements were maintained when feedback was removed and generalized to activity periods when neither supervisor presence nor feedback was provided. Other staff behavior was not adversely affected by the intervention package.     

Recognition of Inflected Words in a Morphologically Limited Language: Frequency Effects in Monolinguals and Bilinguals

The effect of word frequency on the processing of monomorphemic vs. inflected words was investigated in a morphologically relatively limited language, Swedish, with two participant groups: early Finnish–Swedish bilinguals and Swedish monolinguals. The visual lexical decision results of the monolinguals suggest morphological decomposition with low-frequency inflected nouns, while with medium- and high-frequency inflections, full-form processing was apparently employed. The bilinguals demonstrated a similar pattern. The results suggest that morpheme-based recognition is employed even in a morphologically limited language when the inflectional forms occur rarely. With more frequent inflectional forms, full-form representations have developed for both mono- and bilingual speakers. In a comparable study employing a morphologically rich language, Finnish, Lehtonen and Laine (2003, Bilingualism: Language and Cognition, 6, 213–225) observed full-form access only at the high-frequency range and only for monolinguals. These differences suggest that besides word frequency and language background, the morphological richness of a language affects the processing mode employed with polymorphemic wordsThis study was financially supported by a grant (#20010) from the Joint Committee of the Nordic Social Science Research Councils (NOS-S). We are grateful for Jonna Kortelahti- Brunnsteiner for recruitment and testing of part of the bilingual participants     

Smoking,stress, and negative affect: correlation,causation, and context across stages of smoking

This transdisciplinary review of the literature addresses the questions, Do stress and negative affect (NA) promote smoking? and Does smoking genuinely relieve stress and NA? Drawing on both human and animal literatures, the authors examine these questions across three developmental stages of smoking--initiation, maintenance, and relapse. Methodological and conceptual distinctions relating to within- and between-subjects levels of analyses are emphasized throughout the review. Potential mechanisms underlying links between stress and NA and smoking are also reviewed. Relative to direct-effect explanations, the authors argue that contextual mediator-moderator approaches hold greater potential for elucidating complex associations between NA and stress and smoking. The authors conclude with recommendations for research initiatives that draw on more sophisticated theories and methodologies.     

Preattentive processing of alcohol stimuli

An experiment was conducted to test the automatic analysis of briefly presented alcohol stimuli in alcohol-dependent individuals. Alcoholics and controls were exposed to four different conditions: two brief (30 ms) and two long (130 ms) exposure conditions, each containing alcoholic and non-alcoholic pictures. Heart rate (HR) interbeat intervals were recorded and phasic cardiac responses assessed. Alcoholics had a stronger initial HR deceleration after exposure to masked alcohol slides compared with masked control slides, indicating a preattentive analysis of alcohol stimuli. This initial HR deceleration in the masked condition suggests an automatic attentional focusing to degraded alcohol cues. No such attentional effect was found when the pictures were presented unmasked and were clearly perceived. The implication of these results for the understanding of relapse in addictive behavior is discussed.     

The effects of study-task relevance on perceptual repetition priming

Repetition priming is easily elicited in many traditional paradigms, and the possibility that perceptual priming may be other than an automatic consequence of perception has received little consideration. This issue is explored in two experiments. In Experiment 1, participants named the target from a four-item category search study task more quickly than the nontarget study items at a later naming test. Experiment 2 extended this finding to conditions in which stimuli were individually presented at study. In three different study tasks, stimuli relevant to study-task completion elicited priming on a later test, but stimuli presented outside the context of a task did not. In both experiments, recognition was above chance for nonrelevant stimuli, suggesting that participants explicitly remembered stimuli that did not elicit priming. Results suggest that priming is sensitive to study-task demands and may reflect a more adaptive and flexible mechanism for modification of perceptual processing than previously appreciated.     

Psychosocial Genetic Counseling in the Post-Nondirective Era: A Point of View

For three decades nondirectiveness has served as the central ethos for genetic counseling. It has evolved from narrow definitions defining what should not be done to broad definitions that promote active counseling skills in support of client autonomy and informed decision making. As broad definitions have been formulated, the term nondirective has become largely irrelevant to their content; it persists primarily as a historic relic. It has thus become an impediment to creative theory and clinical practice. I propose that nondirectiveness be replaced as the central ethos, while relevant components (providing balanced information, not imposing the counselor's values) are retained as elements of practice and ethics. This raises the question of what principle(s) should be adopted as a new guiding ethos. To promote a discussion of that issue I propose that the central ethos of genetic counseling should be to bring the psychosocial component into every aspect of the work.