Conspiracy beliefs and majority influence.

Conspiracy beliefs (i.e. beliefs in specific conspiracy theories or the more general conspiracy mentality) are associated with a need for uniqueness and lower adherence to social norms. These findings suggest that conspiracy beliefs might be generally associated with less influence by majority opinions - absolutely and compared to minority opinions. In five experiments involving scenarios unrelated to conspiracy theories (overall N = 1669), participants were informed about the majority/minority opinion on a given issue (e.g. the building of a tunnel), afterward indicating their evaluation or voting intentions regarding the issue. We then tested whether the influence of a majority/minority opinion on evaluation or voting intentions is moderated by conspiracy beliefs. Across studies, we find no significant moderation. A meta-analysis confirms no correlation between conspiracy beliefs and susceptibility to majority influence. Taken together, our studies provide no evidence for the assumption that those holding conspiracy beliefs reject majority opinions per se.

Estimating thresholds of natural vegetation for the protection of water quality in South African catchments.

Many of South Africa's current water quality problems have been attributed to diffuse pollution derived from poorly regulated land use/land cover (LULC) transformations. To mitigate these impacts, the preservation of an adequate amount of natural vegetation within catchment areas is an important management strategy. However, it is not clear how much natural vegetation cover is required to provide adequate levels of protection, nor at which scale(s) this strategy would be most effective. To investigate the possibility of estimating minimum thresholds of natural vegetation required to protect water resources, regression analysis was used to model relationships between water quality (measured using Nemerow's Pollution Index) and metrics of natural vegetation at multiple scales across a sample of sub-catchments located along the western, southern, and south-eastern coast of South Africa. With conspicuous outliers removed, the models were able to explain up to 82 % of the variability in the relationship between land use and water quality. Moreover, a statistically significant, nonlinear, and inverse relationship was found between proportions of natural vegetation cover and pollution levels. This relationship was strongest when measured (1) across the whole catchment and (2) within a 200 m riparian buffer zone. The models further indicated that approximately 80 to 90 % natural vegetation cover was necessary at these scales to maintain water quality at ecologically acceptable levels. Additional nonlinear thresholds estimated using breakpoint analysis suggested that if proportions of natural vegetation fall below 45 % (across the whole catchment) and 60 % (within a 200 m riparian buffer zone) a dramatic increase in pollution levels can be expected. The estimated thresholds are recommended as guidelines that can be used to inform integrated land and water resources management strategies aimed at protecting water quality in the study area. Likewise, the methods described are recommended for the estimation of similar thresholds in other regions.

Motivational consequences of counterfactual mindsets: Does counterfactual structure influence the use of conservative or risky tactics?

Motivational states are important determinants of human behavior. Regulatory focus theory suggests that a promotion focus stimulates risky behavior, whereas a prevention focus fosters conservative tactics. Previous research linked counterfactual structure with regulatory focus. Extending this work, we predicted that additive counterfactual mindsets ("If only I had…") instigate risky tactics in subsequent situations, whereas subtractive counterfactual mindsets ("If only I had NOT…") lead to conservative tactics. We tested this prediction and the underlying assumptions in four preregistered studies (total N = 803) and obtained consistent null results. Additive and subtractive counterfactual mindsets did not elicit different tactics - neither on behavioral nor on self-report measures - and they did not influence participants' motivation compared to a neutral control condition. Likewise, our results put doubts on previous findings on counterfactuals and regulatory focus as well as regulatory focus and conservative or risky behavior. More general implications for research on counterfactuals and motivation are discussed.

A review of the opportunities to support pollinator populations in South African cities.

Globally insects are declining, but some guilds of pollinators are finding refuge in urban landscapes. The body of knowledge on urban pollinators is relatively mature, which means it is now possible to begin to make generalization. Unfortunately, studies do not represent climatic regions evenly and there is a gap in research from the African continent. This study aimed to address some of the gaps on urban pollination knowledge in South Africa and to identify opportunities to improve urban habitats for pollinators. We reviewed the international literature on urban pollinators and the South African literature on pollinators with a landscape ecology focus, drawing on literature with an emphasis on agricultural and ecosystem services. The findings show that some taxa (e.g. large-bodied, cavity nesting bees) will exploit urban environments increasing in abundance with urban intensity. Moderately sensitive taxa (such as small-bodied, ground-nesting bees) take advantage of urban environments only if local habitats are supportive of their needs for resource provision and habitat connectivity. The South African urban poor rely on pollination services for subsistence agriculture and the reproduction of wild-foraged medicines and food. Potential interventions to improve habitat quality include strategic mowing practices, conversion of turf-grass to floral rich habitats, scientific confirmation of lists of highly attractive flowers, and inclusion of small-scale flower patches throughout the urban matrix. Further research is needed to fill the Africa gap for both specialized and generalized pollinators (Diptera, Halictids, Lepidoptera and Hopliini) in urban areas where ornamental and indigenous flowering plants are valued.

Pro-vaccination subjective norms moderate the relationship between conspiracy mentality and vaccination intentions.

OBJECTIVES: Increasing vaccination hesitancy threatens societies' capacity to contain pandemics and other diseases. One factor that is positively associated with vaccination intentions is a supportive subjective norm (i.e., the perception that close others approve of vaccination). On the downside, there is evidence that negative attitudes toward vaccinations are partly rooted in conspiracy mentality (i.e., the tendency to believe in conspiracies). The objective of this study is to examine the role of subjective norms in moderating the association between conspiracy mentality and vaccine hesitancy. We examined two competing predictions: Are those high in conspiracy mentality immune to subjective norms, or do subjective norms moderate the relationship between conspiracy mentality and vaccination intentions? METHODS: We conducted five studies (total N = 1,280) to test these hypotheses across several vaccination contexts (some real, some fictitious). We measured conspiracy mentality, vaccination intentions, subjective norms, attitudes toward vaccination, and perceived behavioural control. RESULTS: A merged analysis across the studies revealed an interaction effect of conspiracy mentality and subjective norm on vaccination intentions. When subjective norm was high (i.e., when participants perceived that close others approved of vaccines) conspiracy mentality no longer predicted vaccination intentions. This was consistent with the moderating hypothesis of subjective norms and inconsistent with the immunity hypothesis. CONCLUSIONS: The typical negative relationship between conspiracy mentality and vaccination intentions is eliminated among those who perceive pro-vaccination subjective norms. Although correlational, these data raise the possibility that pro-vaccination views of friends and family can be leveraged to reduce vaccine hesitancy.

A matter of flexibility: Changing outgroup attitudes through messages with negations.

Attitudes toward outgroups are an important determinant of peaceful coexistence in diverse societies, but it is difficult to improve them. The current research studies the impact of messages with negations on outgroup attitudes, more specifically on outgroup trust. All studies were preregistered. Using different target groups, Studies 1 and 2 provide evidence for the prediction that communicating negations (e.g., "they are not deceptive") enhances outgroup trust (more so than affirmations, such as "they are reliable," and no messages) among people who are initially low in outgroup trust. Three additional studies (Studies 3a, 3b, and 4), using both a causal chain approach and (moderated) mediation analysis, demonstrate that negations promote cognitive flexibility which in turn enhances outgroup trust among those initially low in outgroup trust. One final study suggests that these findings generalize to outgroup attitude change per se by showing that communicating negations also results in more moderate attitudes when the dominant initial attitude is positive (Study 5: high warmth) rather than negative (Studies 1-4: low trustworthiness). As such, communication that negates people's initial outgroup attitudes could be an effective (previously discounted) intervention to reduce prejudice in intergroup settings. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Team Sports Off the Field: Competing Excludes Cooperating for Individual but Not for Team Athletes.

Both team and individual sports require competition, whereas cooperation is more prevalent in team than in individual sports. In particular, team athletes have to compete (for starting roles) while cooperating (for team success) with the same teammates. For team athletes, competition and cooperative behavior, two mutually exclusive constructs according to earlier psychological research, might therefore be less incompatible than for individual athletes. In Study 1, team athletes attributed a higher demand to compete and cooperate with the same teammates or training partners to their sport than individual athletes to their sport. Study 2 showed that experiencing competition (vs. control) undermines information sharing less for team than for individual athletes. In addition, Study 2 demonstrated that priming competition undermines the accessibility of cooperative thoughts less for team than for individual athletes. Therefore, team athletes might be better at competing without ceasing to cooperate. Implications for collaboration in groups are discussed.

Photoactive films of photosystem I on transparent reduced graphene oxide electrodes.

Photosystem I (PSI) is a photoactive electron-transport protein found in plants that participates in the process of photosynthesis. Because of PSI's abundance in nature and its efficiency with charge transfer and separation, there is a great interest in applying the protein in photoactive electrodes. Here, we developed a completely organic, transparent, conductive electrode using reduced graphene oxide (RGO) on which a multilayer of PSI could be deposited. The resulting photoactive electrode demonstrated current densities comparable to that of a gold electrode modified with a multilayer film of PSI and significantly higher than that of a graphene electrode modified with a monolayer film of PSI. The relatively large photocurrents produced by integrating PSI with RGO and using an opaque, organic mediator can be applied to the facile production of more economic solar energy conversion devices.