The utility of Stroop task switching as a marker for early-stage Alzheimer’s disease.

Past studies have suggested attentional control tasks such as the Stroop task and the task-switching paradigm may be sensitive for the early detection of dementia of the Alzheimer’s type (DAT). The authors of the current study combined these tasks to create a Stroop switching task. Performance was compared across young adults, older adults, and individuals diagnosed with very mild dementia. Results indicated that this task strongly discriminated individuals with healthy aging from those with early-stage DAT. In a logistic regression analysis, incongruent error rates from the Stroop switching task discriminated healthy aging from DAT better than any of the other 18 cognitive tasks given in a psychometric battery. (PsycINFO Database Record (c) 2010 APA, all rights reserved)

The latent structure of dementia was examined in a group of 10,775 older adults with indicators derived from a neuropsychological test battery. The author conducted taxometric analysis of these data using mean above minus below a cut, maximum covariance, and latent mode factor analysis and found results more consistent with dementia as a dimensional (lying along a continuum) than categorical (representing a distinct entity) construct. A second study conducted with a group of 2,375 adults whose ages ranged from 21 to 64 years produced similar results. These findings denote that dementia, as measured by deficits in episodic memory, attention and concentration, executive function, and language, differs quantitatively rather than qualitatively from the cognitive status of adults without dementia. The implications of these results for classification, assessment, etiology, and prevention are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)

The present research examined stressful life events and personality development across middle adulthood. Participants (N = 533) related the most stressful event they had experienced within the last 10 years, indicated whether they considered the event to be a turning point and/or lesson learned, and twice completed a comprehensive measure of traits defined by the five-factor model of personality; the stressful event occurred between these two assessments. Descriptions were coded to classify events into broad content domains based on the nature of the event. Prospectively, individuals high in Neuroticism perceived the event as a turning point; extraverts learned a lesson from it. Longitudinally, perceiving the event as a negative turning point was associated with increases in Neuroticism, whereas learning a lesson from the event was associated with increases in Extraversion and Conscientiousness. Characteristics of the events themselves were primarily unrelated to trait change. Across middle adulthood, personality trait change may be more strongly related to how individuals understand the stressful events in their lives rather than simply the occurrence of such events. (PsycINFO Database Record (c) 2010 APA, all rights reserved)

The study used a daily process design to examine the role of psychological resilience and positive emotions in the day-to-day experience of pain catastrophizing. A sample of 95 men and women with chronic pain completed initial assessments of neuroticism, psychological resilience, and demographic data, and then completed short diaries regarding pain intensity, pain catastrophizing, and positive and negative emotions every day for 14 consecutive days. Multilevel modeling analyses indicated that independent of level of neuroticism, negative emotions, pain intensity, income, and age, high-resilient individuals reported greater positive emotions and exhibited lower day-to-day pain catastrophizing compared with low-resilient individuals. Mediation analyses revealed that psychologically resilient individuals rebound from daily pain catastrophizing through experiences of positive emotion. Implications for research on psychological resilience, pain catastrophizing, and positive emotions are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)

Repetitive thought (RT) involves frequent or prolonged thoughts about oneself and one’s world, encompassing discrete forms such as trait worry, rumination, processing, and reminiscing. These forms of RT can be described using 3 basic, underlying qualities: total propensity for RT of all types, valence (positive vs. negative content), and purpose (searching or uncertainty vs. solving or certainty). The adaptiveness of discrete forms with regard to health is likely to be related to these qualities, particularly valence and total propensity. The present study confirmed the model and identified the relationship of these qualities of RT to subjective psychological, physical, and cognitive health in older adults aged 60–94 (N = 179). As predicted, more negatively valenced trait RT was associated with worse psychological, physical, and cognitive health. More total propensity for RT was associated only with worse psychological health. Searching purpose was associated only with worse cognitive health. In turn, negatively valenced RT was predicted by poorer executive functions, suggesting that such functions may be important for directing this quality of RT. The valence of older adults’ RT is important insofar as it may contribute to their sense of good or ill health. However, the propensity for all kinds of RT to associate with poorer psychological health may reflect the co-occurrence of negative and positive RT, such as rumination and emotional processing. Although RT has not been extensively investigated in older adults, it appears to play an important role in their subjective health. (PsycINFO Database Record (c) 2010 APA, all rights reserved)

Multiple studies suggest an association of marijuana use with increased rates of sexual risk behavior and sexually transmitted diseases (STDs). Most studies have focused on global associations of marijuana use with sexual risk outcomes and few have examined relevant cognitive variables. Adolescents in the juvenile justice system are at elevated risk for HIV/STDs and preliminary evidence suggests that marijuana is a potentially important cofactor for sexual risk behavior in this population. This study evaluated global, situational and event-level associations of marijuana use and sex-related marijuana expectancies with sexual risk outcomes in a large, racially diverse sample of adjudicated youth (n = 656, 66% male, mean age = 16.7 years). Cross-sectional and prospective analyses identified associations of marijuana use and dependence symptoms with sexual risk outcomes, including lower frequency of condom use and higher STD incidence. Stronger sex-related marijuana expectancies predicted greater intentions for and frequency of marijuana use in sexual situations. In event-level analyses that controlled for alcohol, marijuana use predicted a significantly decreased likelihood of condom use; this association was moderated by sex-related marijuana expectancies. Mediation analyses suggested that behavioral intentions partly accounted for the prospective association of expectancies with marijuana use before sex. These results provide further evidence that marijuana use is a potentially important cofactor for HIV/STD transmission in high-risk adolescents and suggest that cognitive factors could be important for characterizing this association. (PsycINFO Database Record (c) 2010 APA, all rights reserved)