A Note on the Conversion of Item Parameters Standard Errors

The relations among alternative parameterizations of the binary factor analysis (FA) model and two-parameter logistic (2PL) item response theory (IRT) model have been thoroughly discussed in literature. However, the conversion formulas widely available are mainly for transforming parameter estimates from one parameterization to another. There is a lack of discussion about the standard error (SE) conversion among different parameterizations, when SEs of IRT model parameters are often of immediate interest to practitioners. This article provides general formulas for computing the SEs of transformed parameter values, when these parameters are transformed from FA to IRT models. These formulas are suitable for unidimensional 2PL, multidimensional 2PL, and bi-factor 2PL models. A simulation study is conducted to verify the formula by providing empirical evidence. A real data example is given in the end for an illustration.     

Trajectories of public psycho-behavioural responses relating to influenza A(H7N9) over the winter of 2014-15 in Hong Kong

Objective: To explore trajectories of public psycho-behavioural responses over one influenza A(H7N9) epidemic wave, and examine the interplays among social norm influence, disease worry and protective behaviours.

Methods: Participants were 464 adults who completed the baseline and at least two follow-up assessments on their H7N9-related Perceived Susceptibility, Perceived Severity, Perceived Efficacy, Worry, Social Norms influence and Protective Behaviours in a five-phase longitudinal survey over one H7N9 epidemic wave. Latent growth modelling (LGM) identified trajectories of these psycho-behavioural responses while multi-process LGM examined the inter-relationships among trajectories of Social Norms influence, Worry and Protective Behaviours.

Results: Trajectories of Perceived Susceptibility, Worry, Social Norms and Protective Behaviours increased initially but declined as the epidemic decayed, while Perceived Severity increased linearly and Perceived Efficacy remained stable across the epidemic. Change in Social Norms influence was significantly associated with change in Worry (β?=?0.65) which was significantly associated with change in Protective Behaviours (β?=?0.62).

Conclusion: The public’s threat appraisal but not efficacy appraisal may have been well-informed by epidemic-related information. Social Norms may be important contributors of public emotional response to an epidemic. Communication via social networks during an epidemic could be important for regulating public emotional response and guiding their behavioural change.     

Theological Reflection on the Ecological Problem in Relation to the Accra Confession: An East Asian Perspective

Compared with the declarations related to ecological concerns produced by other ecclesial bodies, the Accra Confession is not a latecomer.² But in view of the increasingly severe situation the world is now facing (for example, the nuclear threat, from Chernobyl to Three Mile Island and, recently, Fukushima), it seems that the “prophetic” voice from the Christian church always comes too late. Be that as it may, every Christian should share the common mission of being a peacemaker with all of God's creation, despite the groaning of the earth in face of all sorts of threat and injustice. In this paper, I first review the Accra Confession in relation to ecological concerns. Then, as it seems to me that the interfaith perspective has received less attention, I develop a theological reflection based on my East Asian cultural resources in order to make a contribution to the global problem from a regional stance. Finally I provide some practical suggestions.     

女性人格特征的服装服饰刻板印象研究

采用服装服饰偏好语义区分量表对与女性人格特征相关联的服装服饰刻板印象进行了研究。实验由１０７名男女大学生，针对给定的刺激人物的四种不同人格特征，在服装服饰量表上作出印象判断。结果证实，存在与不同人格特点相关联的服装服饰刻板印象，并揭示出在四种人格特征的服装服饰刻板印象中，所存在的具体的服饰符号特征。实验还发现，服装服饰刻板印象中存在着性别差异。作为知觉者的女性对女性刺激人物的印象较作为知觉者的男性表现出极端化的特点。