Extreme probabilities for contingency tables under row and column independence with application to fisher's exact test

Theorerms are proved for the maxima and minima of IIR_i!/IIC_j!/T!II_yij ! over r× c contingcncy tables Y=(y_ij) with row sums R₁,…,R_r, column sums C₁,…,C_c, and grand total T. These results are imlplemented into the network algorithm of Mehta and Patel (1983) for computing the P-value of Fisher's exact test for unordered r×c contingency tables. The decrease in the amount of computing time can be substantial when the column sums are very different.     

A time-varying measurement error model for age of onset of a psychiatric diagnosis: applied to first depressive episode diagnosed by the Composite International Diagnostic Interview (CIDI)

A substantial degree of uncertainty exists surrounding the reconstruction of events based on memory recall. This form of measurement error affects the performance of structured interviews such as the Composite International Diagnostic Interview (CIDI), an important tool to assess mental health in the community. Measurement error probably explains the discrepancy in estimates between longitudinal studies with repeated assessments (the gold-standard), yielding approximately constant rates of depression, versus cross-sectional studies which often find increasing rates closer in time to the interview. Repeated assessments of current status (or recent history) are more reliable than reconstruction of a person's psychiatric history based on a single interview. In this paper, we demonstrate a method of estimating a time-varying measurement error distribution in the age of onset of an initial depressive episode, as diagnosed by the CIDI, based on an assumption regarding age-specific incidence rates. High-dimensional non-parametric estimation is achieved by the EM-algorithm with smoothing. The method is applied to data from a Norwegian mental health survey in 2000. The measurement error distribution changes dramatically from 1980 to 2000, with increasing variance and greater bias further away in time from the interview. Some influence of the measurement error on already published results is found.     

Force field analysis: A new way to evaluate your strategy

Force field analysis has been widely used by organization development practitioners to plan and implement organizational changes. This paper extends force field analysis to strategic management by reviewing the concept of force field analysis, discussing internal and external forces for changes in strategy, and suggesting guidelines for the use of force field analysis in organizational planning.     

Modeling perceived job productivity and its antecedents considering gender as a moderator

This study proposes a conceptual model for examining the formation of perceived job productivity and its antecedents. In the model, leader–member exchange and job satisfaction both directly and indirectly influence perceived job productivity, with the latter effect occurring through the mediation of organizational commitment. Gender moderates each model path. The moderating effects are simultaneously tested using data from 344 engineering staff of a large Taiwanese high-tech manufacturer. Lastly, the empirical findings and their implications are discussed.     

Evidence-Based Suicide Prevention Screening in Schools

Screening for suicidality, as called for by the President's New Freedom Commission on Mental Health, is a major public health concern. As a place where adolescents spend a considerable amount of their waking hours, school is an important venue for screening adolescents for suicidal behaviors and providing preventive education and risk management. Social workers, as the largest occupational group of mental health professionals in the United States, have a significant role to play in the national strategy to prevent youth suicide, especially at the school level. This article reviews the literature on suicide prevention screening, warning signs, and risk factors to gain a better understanding of evidence-based screening strategies and discuss the implications for school social workers, counselors, and psychologists. It focuses on the identification of research-based information and explication of potential means for guiding preventive screening and clinical practice with suicidal adolescents.     

Properties and Applications of the Generalized Likelihood as a Summary Function for Prediction Problems

The generalized likelihood plays an important role in parametric inference for prediction and empirical Bayesian models. This paper emphasizes the utility of the generalized likelihood as a summarization procedure in general prediction models. Properties of the generalized likelihood when used in this setting, and examples of its use as a data analytic tool are given in a series of numerical examples.     

Birth parents’ perceptions of professional practice in child care and adoption proceedings: implications for practice

This paper explores non‐relinquishing birth parents’ experiences of contested child care and adoption proceedings. It highlights the perceptions and voices of birth parents which are rarely prioritized in dominant discourses of professional practice in this area. The paper reviews previous related research and also discusses a small‐scale empirical study which elicited the perspectives of three birth parents whose children had been made subject to care proceedings and placed for adoption in England. Drawing on previous research and this study, the paper makes range of practice recommendations for sensitive professional practice with birth parents during contested child care and adoption proceedings.     

Case studies of technology roadmapping in mining

Mining is a long established art with legacy processes and institutional structures that face rapidly changing technological environments. The perception is that technology planning and forecasting receives priority attention only as far as they may be linked to making production tonnage in the short term, thus giving the impression that new technology may be introduced without developing a culture and operational requirements that influence successful implementation of new technologies. With depleting ore grades of existing mines, and the prevailing global financial crisis making it prohibitive to develop richer sources, mining is considered to be short-term risk averse and this accentuates a more conservative approach towards technology planning and forecasting. Based on surveys and interviews with practicing miners, this paper discusses three case studies on the practice of technology planning and forecasting in mining firms. It is evident that technology planning and forecasting, and particularly the use of the roadmapping approach, is not a ‘culture’ common to mining firms.