Distinguishing blocking from attenuation in visual selective attention

Sensory information must be processed selectively in order to represent the world and guide behavior. How does such selection occur? Here we consider two alternative classes of selection mechanisms: In blocking, unattended stimuli are blocked entirely from access to downstream processes, and in attenuation, unattended stimuli are reduced in strength but if strong enough can still access downstream processes. Existing evidence as to whether blocking or attenuation is a more accurate model of human performance is mixed. Capitalizing on a general distinction between blocking and attenuation-blocking cannot be overcome by strong stimuli, whereas attenuation can-we measured how attention interacted with the strength of stimuli in two spatial selection paradigms, spatial filtering and spatial monitoring. The evidence was consistent with blocking for the filtering paradigm and with attenuation for the monitoring paradigm. This approach provides a general measure of the fate of unattended stimuli.     

Understanding the Effect of Social Capital on the Depression of Urban Chinese Adolescents: An Integrative Framework

Using data from an ongoing longitudinal study of 5,164 adolescents and their parents from seven cities in mainland China, this study investigated how social capital embedded in the family and the community, together with family human capital and financial capital, influenced the depressive symptoms of urban Chinese adolescents within an integrative framework. The structural equation modeling results suggested that higher community social capital was associated with lower level of adolescent depressive symptoms and was the strongest predictor among all these contextual factors. Family social capital played a significant role in mediating the effects of all other contextual factors on adolescent depressive symptoms. Unexpectedly, higher family financial capital predicted increased depressive symptoms both directly and indirectly through its negative effect on family social capital. As for gender, female adolescents reported more depressive symptoms as a result of less available family social capital. Implications of these findings for theory, practice, policy, and future research are discussed.     

The ethics of everyday practice in primary medical care: responding to social health inequities

Background  

Social and structural inequities shape health and illness; they are an everyday presence within the doctor-patient encounter yet, there is limited ethical guidance on what individual physicians should do. This paper draws on a study that explored how doctors and their professional associations ought to respond to the issue of social health inequities.     

Sequence Memory in Music Performance

Abstract— How do people remember and produce complex sequences like music or speech? Music provides an example of excellent sequence memory under fast performance conditions; novices as well as skilled musicians can perform memorized music rapidly, without making mistakes. In addition, musical pitches repeat often within a melodic sequence in different orders, yet people do not confuse the sequential ordering; temporal properties of musical pitches aid sequence memory. I describe a contextual model of sequence memory that is sensitive to the rate at which musical sequences are produced and to individual differences among performers. Age and musical experience differentiate adults' and children's memory for musical sequences during performance. Performers' memory for the sequential structure of one melody transfers or generalizes to other melodies in terms of the sequence of pitch events, their temporal properties, and their movements. Motion-analysis techniques provide further views of the time course of the cognitive processes that make sequence memory for music so accurate.     

After-School Supervision, Psychosocial Impact, and Adolescent Smoking and Alcohol Use in China

We examined effects of self-care after school hours and psychosocial factors on cigarette smoking and alcohol use among adolescents in China. Survey data were obtained from 4734 7th and 11th grade students from seven cities across China. Students were queried about the frequency and quantity of unsupervised self-care after school in an average week. Tobacco and alcohol usage were also obtained. Odds ratios were calculated to determine the strength of association between unsupervised self-care after school and substance use. Results indicated that the amount of self-care after-school (how many days and how many hours per week) was significantly associated with increased risk for smoking and alcohol use among Chinese adolescents. These associations remained significant even after controlling for anxiety, depressive symptoms, and peer influence. The interaction between unsupervised self-care after school and peer influence indicated that unsupervised self-care after school is a stronger risk factor for smoking among adolescents with pro-smoking friends. The findings suggest that substance use prevention programs for youth in China should try to enhance parental monitoring. As it may not be feasible for families to revert to a lifestyle that includes supervision by relatives, other approaches such as organized after-school care are worthy of consideration.     

Extremal edges: a powerful cue to depth perception and figure-ground organization

Extremal edges (EEs) are projections of viewpoint-specific horizons of self-occlusion on smooth convex surfaces. An ecological analysis of viewpoint constraints suggests that an EE surface is likely to be closer to the observer than the non-EE surface on the other side of the edge. In two experiments, one using shading gradients and the other using texture gradients, we demonstrated that EEs operate as strong cues to relative depth perception and figure-ground organization. Image regions with an EE along the shared border were overwhelmingly perceived as closer than either flat or equally convex surfaces without an EE along that border. A further demonstration suggests that EEs are more powerful than classical figure-ground cues, including even the joint effects of small size, convexity, and surroundedness.     

TOTEMISM,METAPHOR AND TRADITION: INCORPORATING CULTURAL TRADITIONS INTO EVOLUTIONARY PSYCHOLOGY EXPLANATIONS OF RELIGION

Totemism, a topic that fascinated and then was summarily dismissed by anthropologists, has been resurrected by evolutionary psychologists’ recent attempts to explain religion. New approaches to religion are all based on the assumption that religious behavior is the result of evolved psychological mechanisms. We focus on two aspects of Totemism that may present challenges to this view. First, if religious behavior is simply the result of evolved psychological mechanisms, would it not spring forth anew each generation from an individual's psychological mechanisms? Yet, Australian Totemism, like other forms of Totemism, is profoundly traditional, copied by one generation from the prior ones for hundreds of generations. Regardless of personal inclinations, individuals are obligated to participate. Second, it is problematic to assume that all practitioners of Totemism actually believe their religious claims. We propose an alternative explanation that accounts for the persistence of Totemism and that does not rely on an assumption that its practitioners are preliterate or naive because they have strange beliefs. We focus on Totemism as a cultural mechanism aimed at building and sustaining social relationships among close and distant kinsmen.     

Generic Response Classes And Relational Frame Theory: Response To Hayes And Barnes-Holmes.

Hayes and Barnes‐Holmes (2004) assert that the concept of a topographically unconstrained response class, the concept that carries the explanatory burden of relational frame theory, appeals to no new principles. Operants are properly defined functionally. I argue that they have stretched the concept of the generic response class beyond its appropriate limits. Skinner conceived of response classes as empirically defined units, mutually interchangeable in quantitative functions. The notion of overarching, generalized operants is an uncritical, analogical extension of this concept. I hold that the conceptual work of relational frame theory is incomplete, that a statement of principle is necessary, even if not new. Finally, I distinguish a supposed commitment to a philosophical “mediationism” from a valid inquiry about mediating behavior; that is, behavior with stimulus products that participate in the control of the behavior of primary interest.     

Too Good to Be True? Using Realism to Enhance Applicant Attraction

Research that has examined the effects of realism on pre-hire outcomes has suggested that it does not harm recruitment. We present evidence that realistic information may, under certain circumstances, increase organizational attractiveness. Participants (N = 225) evaluated one of two recruitment messages, positive only or realistic, and reported their perceptions of organizational attractiveness, source credibility, and perceptions of the challenge inherent in the job. Consistent with our hypothesis, the realistic recruitment message led to higher organizational attractiveness than the positive only message. Contrary to expectations, however, this effect appears to be mediated through perceptions of challenge in the job, rather than perceptions of source credibility.