The P3 component of the event-related potential (ERP) to an acoustic startle probe is modulated during picture viewing, with
reduced P3 amplitude when participants view either pleasant or unpleasant, as opposed to neutral, pictures. We have interpreted
this as reflecting capture of attentional resources by affective pictures, with fewer resources available for processing the
secondary startle probe. In the present study, we tested this resource allocation hypothesis by presenting either pictures
or sounds as foreground stimuli, with the prediction that P3 amplitude in response to secondary startle probes would be reduced
for affectively engaging foregrounds regardless of modality. Using dense-array electroencephalography and a source estimation
procedure, we observed that P3 amplitude was indeed smaller when startle probes were presented during emotional, as opposed
to neutral, stimuli for both sound and picture foregrounds. Source modeling indicated a common frontocentral maximum of P3
modulation by affect. The data support the notion that emotionally arousing stimuli transmodally attract resources, leading
to optimized processing of the affective stimuli at the cost of the processing of concurrent stimuli. 相似文献
A new portmanteau test for autocorrelation among the errors of interrupted time-series regression models is proposed. Simulation results demonstrate that the inferential properties of the proposed Q(H-M) test statistic are considerably more satisfactory than those of the well known Ljung-Box test and moderately better than those of the Box-Pierce test. These conclusions generally hold for a wide variety of autoregressive (AR), moving averages (MA), and ARMA error processes that are associated with time-series regression models of the form described in Huitema and McKean (2000a, 2000b). 相似文献
Behavioral differences in the visual processing of objects and backgrounds as a function of cultural group are well documented.
Recent neuroimaging evidence also points to cultural differences in neural activation patterns. Compared with East Asians,
Westerners’ visual processing is more object focused, and they activate neural structures that reflect this bias for objects.
In a recent adaptation study, East Asian older adults showed an absence of an object-processing area but normal adaptation
for background areas. In the present study, 75 young and old adults (half East Asian and half Western) were tested in an fMR-adaptation
study to examine differences in object and background processing as well as object—background binding. We found equivalent
background processing in the parahippocampal gyrus in all four groups, diminished binding processes in the hippocampus in
elderly East Asians and Westerners, and diminished object processing in elderly versus young adults in the lateral occipital
complex. Moreover, elderly East Asians showed significantly less adaptation response in the object areas than did elderly
Westerners. These findings demonstrate the malleability of perceptual processes as a result of differences in cohort-specific
experiences or in cultural exposure over time. 相似文献
Articles published in the Journal of Employment Counseling from 2000 to 2019 were analyzed for trends over time related to author characteristics (i.e., domicile, gender, work setting, and leading contributors and institutions) and article content (i.e., typology, topical issues, research methodology, characteristics of participants, research design, statistics used, report of effect size and sample reliability and validity). 相似文献
Although numerous studies have shown that religious attendance is associated with greater social support, concerns remain about selection into religious attendance and more supportive relationships. In this paper, we employ data collected from the 2011 Miami-Dade Health Survey (n?=?444) to assess the extent to which the association between religious attendance and social support is due to selection processes related to personality, health behavior, and health status. In our multinomial logistic regression of attendance, we find that the odds of weekly attendance are increased by extraversion and reduced by smoking. We also observe that religious attendance does not vary according to level of agreeableness, self-esteem, alcohol consumption, psychological distress, or physical health. In our regression of support, we find that respondents who attend religious services weekly or more tend to report more social support than respondents who never attend. This association persisted with adjustments for age, gender, race, immigrant status, interview language, education, employment status, household income, financial strain, marital status (parent and respondent), the presence of children, family difficulties, personality (agreeableness, extroversion, and self-esteem), health behavior (smoking, binge drinking, and substance use), and health status (psychological distress, activity limitations, and overall physical health). Across models, the association between weekly attendance and social support is attenuated by no more than 7%. This attenuation is due to personality (extraversion), not health behavior or health status. We conclude that the association between religious attendance and social support is primarily driven by integration processes rather than any selection processes we have considered.
Seventy-two children (18 black males, 18 white males, 18 black females, 18 white females) and their families participated in a study to examine the the validity of the HOME Inventory in terms of its relation to early indices of social behavior. Early social behavior was assessed using the Infant Behavior Record from the Bayley Scales. A factor analysis produced five behavior dimensions: 1) positive orientation and involvement, 2) fear and reticence, 3) enthusiasm and alertness, 4) activity level, and 5) self-absorption. In general, the findings show a similar but somewhat stronger relation between home environment scores and social behavior for females than males. For infant males, positive orientation was significantly related to organization of the environment and provision of appropriate play materials. Self-absorption was moderately related to avoidance of restriction and punishment. For infant girls, both positive orientation and activity level were significantly related to four of the six HOME subscales. 相似文献
The Caldwell HOME Inventory is a 45-item observation/interview procedure designed to assess the quality and quantity of support for development available to the infant in the home environment. Using the HOME, a longitudinal study of over 100 families from Little Rock, Arkansas has been conducted. A review of the longitudinal study is presented. The review shows substantial relation between HOME scores and children's mental test scores throughout the preschool years. Some sex and race differences in the relation were noted. Studies investigated the reciprocal relation of infant and environment and the effect of environmental stability on development. 相似文献
Head orientation was investigated in a longitudinal study of 37 infants, who were observed at ages 2, 4, 8, and 12 weeks, during a 60-second period that followed each of four (60 second) midline or lateral holds. When newborn, the infants tended to lie with their heads to the right, but this bias weakened over the first 3 postnatal months. This rightward motor bias was constrained further by such factors as sex and holding position; both factors had their strongest effect at 8 weeks. Finally, evidence was found for behavioral reorganization of postural orientation such that head orientation was less influenced by prior head positioning after than prior to 8 weeks. 相似文献