The meaning and role of ideology in system justification and resistance for high- and low-status people.

In this article we explore how beliefs about system ideals and the achievement of those ideals differentially predict system justification among low- and high-status groups. Our goal was to reconcile how people can promote system ideals such as equal opportunities for all and at the same time recognize that group-based disparities are, in part, due to these unfulfilled ideals. Three studies examined whether people perceived a discrepancy between a system's ideal goals and its achievement of those goals. Everyone endorsed these goal ideals more than they believed that the goals were being achieved; however, this discrepancy was larger for low-status people. The larger the perceived discrepancy, the more dissatisfied people were with the system and the more likely they were to support hierarchy-attenuating policies. Studies 2 and 3 also examined people's motivation for endorsing goal ideals. People of all statuses endorsed system ideals to promote an ideal system more than to legitimize the actual system (Study 2); however, high-status people were slightly more likely to endorse system ideals to legitimize the actual system than low-status people (Study 3). In summary, low-status people were more likely than high-status people to recognize discrepancies between system goals and system outcomes, show dissatisfaction with the American system, and prefer policies that would attenuate extant hierarchies.

Prevalence of Anguillicoloides crassus and growth variation in migrant yellow-phase American eels of the upper Potomac River drainage.

Prevalence of the non-native swim bladder nematode Anguillicoloides crassus has recently increased in American eels from estuaries of the North American Atlantic coast, but little is known about parasite prevalence or conditions of previous infection in upstream migrant eels within upper watersheds. This study is the first to confirm presence of A. crassus in the upper Potomac River watershed. We estimated A. crassus prevalence during 3 time periods: September to October 2006 (5/143 eels, 3.5%), August to October 2007 (0/49 eels), and June 2008 (0/50 eels). All eels were sampled from the Millville Dam eel ladder on the lower Shenandoah River, a Potomac River tributary located approximately 285 km upstream of Chesapeake Bay, USA. Of the 5 infected eels, parasite intensity was 1 for each eel, and mean intensity was also 1.0. A swim bladder degenerative index (SDI) was calculated for the 50 eels from the final sampling period, and 38% of those eels (19 of 50) showed signs of previous infection by A. crassus. We also aged 42 of the 50 eels (mean ± SE = 6.7 ± 0.29 yr, range 4 to 11 yr) from the final sampling period. Based on the range of possible SDI scores (0 to 6), severity of previously infected swim bladders was moderate (SDI = 1 or 2). Previously infected eels, however, had a lower length-at-age than that of uninfected eels. Female yellow-phase eels in upper watersheds develop into large highly fecund silver-phase adults; hence, a parasite-induced effect on growth of yellow-phase eels could ultimately reduce reproductive potential.

Built environment instruments for walkability, bikeability, and recreation: disability and universal design relevant?

BACKGROUND: Despite a plethora of instruments that measure the built environment with respect to its effect on potential physical activity, little is known about how relevant these instruments are for people with disabilities (PWDs). OBJECTIVE: This review comprises an in-depth review of instruments related to the built environment and physical activity, as well as an examination of such instruments to determine their applicability for PWDs. METHODS: In this paper, the term "built environment" refers to human-made structures (e.g., urban and rural design characteristics, recreational structures) that may facilitate or impede an individual's ability to be physically active. A content analysis was conducted on 95 instruments measuring walkability, bikeability, and recreation with respect to disability and universal design (UD) relevance. Instruments were also cataloged according to other dimensions, including psychometric properties, data collection modalities, and impact or use. RESULTS: Roughly one third of all instruments include some disability-specific items, and only a few UD principles are consistently demonstrated across all instruments. Psychometric information is available for approximately one half of the instruments. Most instruments use objective/audit methods of data collection, with less using subjective/perceived and Geographic Information System (GIS) methods. With respect to instrument impact/use, just over one half of the instruments have articles cited in the peer-reviewed literature. CONCLUSIONS: Recommendations for new and revised built environment instruments include more focus on specific disability populations, incorporation of all UD principles, as well as attention to psychometric quality and measurement specificity.