社交网站中的自我呈现与青少年网络利他行为:网络社交效能和希望的作用

为考察社交网站中的积极自我呈现、真实自我呈现对青少年网络利他行为的影响以及网络社交效能和希望在其中的中介作用，采用社交网站中的积极自我呈现和真实自我呈现问卷、网络利他行为量表、网络社交效能问卷和希望量表对安徽、福建、河南、湖南、山西、天津、云南等省份八所中学的805名初中二年级学生（男生427名，女生378名；被试平均年龄为13.38岁，SD=0.63）进行问卷调查。研究显示：（1）社交网站中的积极自我呈现和真实自我呈现均能正向预测青少年网络利他行为；（2）网络社交效能在积极自我呈现与青少年的网络利他行为之间起中介作用，也在真实自我呈现与青少年的网络利他行为之间起中介作用；（3）希望在真实自我呈现与青少年的网络利他行为之间起中介作用。     

Environmental Ethics And Yellowstone: Preservation Of Geological Rarities

This article uses a core group of three arguments to support the contention that Yellowstone National Park's thermal sites deserve special efforts to preserve them, and that this goes above and beyond the general spirit motivating the national parks. It considers arguments having to do with educational value and rarity, and an argument that relies on aesthetic constructs. For purposes of evaluating the notion of rarity, comparison is made to work on the rare saline water preserve of Mono Lake. Part and parcel of this line of debate has to do with the notion that there has been a general lack of commentary on the value of geothermal areas. The work of William J. Fritz and Robert C. Thomas, Marc Hendrix, and others is cited.     

Drifting Further Apart? How Exposure to Media Portrayals of Muslims Affects Attitude Polarization

Political discourses about Muslim immigration in the media and on social networking sites (SNSs) are highly contentious and have the potential to further polarize societal segments, which may ultimately harm democratic processes. Especially on SNSs, politicians and citizens can circumvent journalistic filters often resulting in blatant and emotionally charged content. Using a two-wave panel design (N = 559), we investigated how positive and negative portrayals of Muslims in traditional media outlets and on SNSs influence anti-Muslim immigration attitudes among people who either agree or disagree with the encountered information. Our findings indicate that exposure to negative portrayals further reinforces anti-Muslim immigration attitudes among those who agree with the encountered information. In contrast, for those who disagree with the negative information, a backfire effect emerges, showing that anti-Muslim attitudes even decrease. This effect occurs for both SNSs and traditional media. Positive information about Muslims did not result in attitude polarization.