Meta-Analysis of Pragmatic and Theoretical Research: A Critique

Meta-analysis refers to a set of statistical procedures used to summarize and integrate many empirical studies that focus on one issue. This numerical method of integrating research findings is said to be superior to the narrative type of reviews because it is more objective, reliable, and rigorous. Moreover, the meta-analytic approach is supposedly capable of resolving research controversies, strengthening empirical hypotheses, and discovering new relationships among variables. In this study, these claims are examined and found to be wanting. Some objections to the use of meta-analysis as a means of substantiating theoretical assertions are raised with reference to the rationale of experimentation and to how knowledge evolves. It is concluded that it is inappropriate to apply meta-analysis to integrate theoretical research.     

Indicative conditionals,conditional probabilities,and the “defective truth-table”: A request for more experiments

While there is now considerable experimental evidence that, on the one hand, participants assign to the indicative conditional as probability the conditional probability of consequent given antecedent and, on the other, they assign to the indicative conditional the “defective truth-table” in which a conditional with false antecedent is deemed neither true nor false, these findings do not in themselves establish which multi-premise inferences involving conditionals participants endorse. A natural extension of the truth-table semantics pronounces as valid numerous inference patterns that do seem to be part of ordinary usage. However, coupled with something the probability account gives us—namely that when conditional-free ? entails conditional-free ψ, “if ? then ψ” is a trivial, uninformative truth—we have enough logic to derive the paradoxes of material implication. It thus becomes a matter of some urgency to determine which inference patterns involving indicative conditionals participants do endorse. Only thus will we be able to arrive at a realistic, systematic semantics for the indicative conditional.     

The paradox of power sharing: Participative charismatic leaders have subordinates with more instead of less need for leadership

Although charismatic and participative leaders have been noted for their positive effects on criteria such as performance, job satisfaction, and commitment, few studies have looked at the relations with subordinates' leadership needs. In this study, the relations between charismatic and participative leadership, team outcomes, and a team's need for leadership were investigated. The sample consisted of South Pacific CEOs and their top-level management teams from Fiji, Tonga, Samoa, Vanuatu, and the Solomon Islands. Results showed that charismatic leadership was related to both group-level need for leadership and positive team outcomes. However, team outcomes did not mediate the relations between leadership and a team's need for leadership. Additionally, a moderator effect was found between participative leadership and charismatic leadership in explaining a team's need for leadership, implying that teams of subordinates with participative charismatic leaders need more instead of less leadership from their CEOs.     

Diagnosing organizational cultures: A conceptual and empirical review of culture effectiveness surveys

This review traces the development of survey research methods within the organizational culture tradition and focuses specifically on those instruments that measure the aspects of culture that are related to organizational effectiveness. Our review suggests that the reliability and validity of most instruments in this category is quite limited. This review outlines the recommended logic for the development and validation of culture effectiveness surveys and identifies three key challenges for future culture researchers to address: (1) the confirmatory testing of nested models, (2) the guidelines for aggregating data to the organizational level, and (3) the establishing of criterion-related validity. Using data from the Denison Organizational Culture Survey, we present an empirical illustration of the three challenges identified above and conclude by considering limitations and opportunities for future research.     

The regulation of subjective well-being in cancer patients: An analysis of coping effectiveness

Abstract

The hypothesis that individual coping efforts affect subjective well-being in the face of severe chronic disease is examined with questionnaire data from N=332 cancer patients in a one-year longitudinal study. After depicting conceptual and methodological requirements for the analysis of coping effectiveness, the following five coping modes were investigated in the sample: Rumination, search for affiliation, threat minimization, search for information and search for meaning in religion. Results from a series of hierarchical regression analyses yielded findings that questioned the underlying assumption of a general uniform causal direction within coping-adjustment relationships. Threat minimization proved to be the only coping mode that obviously was “effective” in well-being regulation, that is, was revealed to be predictive of well-being changes over time and to be unaffected by prior levels of well-being. It is argued that the problem of causal directionality has to be carefully examined in future studies on coping effectiveness since interindividual differences in coping behaviors might be a consequence rather than the cause of differences in adjustment status.     

A generalized linear factor model approach to the hierarchical framework for responses and response times

We show how the hierarchical model for responses and response times as developed by van der Linden (2007), Fox, Klein Entink, and van der Linden (2007), Klein Entink, Fox, and van der Linden (2009), and Glas and van der Linden (2010) can be simplified to a generalized linear factor model with only the mild restriction that there is no hierarchical model at the item side. This result is valuable as it enables all well‐developed modelling tools and extensions that come with these methods. We show that the restriction we impose on the hierarchical model does not influence parameter recovery under realistic circumstances. In addition, we present two illustrative real data analyses to demonstrate the practical benefits of our approach.     

Show me the product,show me the model: Effect of picture type on attitudes toward advertising

We suggest that a consideration of consumer self-evaluations is fundamental to understanding the conditions under which it is more advantageous to present person or product pictures in print advertisements. We build on the basic human motives of self-enhancement and self-verification to propose that the specific self-esteem level of consumers, in the domain relevant for the category, differentially affects their responses to picture type. Specifically, for consumers with low (high) domain-specific self-esteem, depicting a product (person) in the advertisement enhances attitudes toward the advertisement more than depicting a person (product). In two studies, we demonstrate the proposed matching relationships using two different domains of consumer self-evaluation: appearance self-esteem and academic self-esteem. We also show that increased and more fluent generation of self-related mental imagery drives the observed improvement in attitudes toward the advertisement. Our findings suggest direct implications for advertising design.     

中药注射剂有效性及“毒性”的物质基础分析

中药注射剂的有效性得到了临床用药的广泛验证,但带来的安全性（“毒性”）问题也引起业界和社会的广泛关注。本文通过分析中药注射剂和同处方的口服剂有效性和“毒性”的特点,认为中药注射剂的有效性来自于小分子物质,而大分子物质则是导致“毒性”的主要物质基础,进而提出从严监控中药注射剂中的大分子物质是提高中药注射剂的有效策略。