Evaluating Multiple-Attribute Decision Support Systems

Differences in the perceived usefulness of five multiple-attribute decision support systems versus a basic spreadsheet are empirically assessed. Twenty-four college faculty members participated in a repeated measures experiment in which they used decision support software for personal computers to analyse semistructured multiple-attribute problems. The software packages employed were Criterium, Expert Choice, Logical Decision, VIMDA, VISA and the spreadsheet package Quattro Pro. A questionnaire was developed to assess user-friendliness of the software, confidence in the procedure implemented by the software, and users’ confidence in their results when employing the decision aids. Time to reach a decision was also measured. Significant differences were fund in the overall way users ranked these aids, in the perceived user-friendliness and the confidence in procedure among aids, and in the time it took to arrive at a result. Comments from users are also reported. © 1997 John Wiley & Sons, Ltd.     

Interactional Influence in the Structuring of Media Use in Groups Influence in Members’Perceptions of Group Decision Support System Use

The aim of this study is to examine the ways in which individuals’perceptions of media use are influenced by others. Traditional theories of media use have proposed that perceptions of media use are shaped by individuals’demographic characteristics and the media's characteristics. However, three recent theories—critical mass theory, social influence model of media use, and adaptive structuration theory—suggest that individuals’perceptions of media emerge as a result of their interaction with others in their social network. Results from a longitudinal study of 30 group decision support system (GDSS) groups and 25 non-GDSS groups over a 3-week period indicate that interactional influence was a better predictor of individuals’perceptions of media use than were individuals’demographic characteristics or characteristics of the media.     

Computer-Assisted Careers Guidance Systems as Decision Support Systems

'Decision support systems' are computer systems which are aimed at improving decisions made by managers. An examination of the literature on decision support systems suggests that there are similarities between these systems and computer-aided careers guidance systems. These similarities —and differences -are explored, and a number of ways in which each approach might learn from the other are suggested.     

Leadership Style,Anonymity, and Creativity in Group Decision Support Systems: The Mediating Role of Optimal Flow

ABSTRACT Prior research indicates that flow, a psychological state characterized by concentration, enjoyment, and intrinsic motivation, may be linked to creativity of individuals participating in computer-mediated meetings. A laboratory experiment was conducted to evaluate the effects of leadership style (transactional contingent reward and transformational) and anonymity level (identified and anonymous) on flow and creativity of 159 undergraduate students working in groups performing a creativity task using a Group Decision Support System (GDSS). Results demonstrated that flow mediated effects of leadership on creativity in a GDSS context, and its role may be moderated by anonymity. Results also indicated that both flow and anonymity were required for enhancing creativity in a GDSS context. Implications for practice and research are discussed.     

A Formal Model for the Study of Communication Support Systems

The lack of conceptual frameworks available for integrating research on organizational computer-based communication technologies is documented. An integrated model for studying communication support phenomena in organizations is formalized from a knowledge management perspective using set-theoretic notation. Key constructs for understanding and exploring communication support systems are identified, such as knowledge workers, knowledge management activities, communicate-abilities, and knowledge management episodes. The implications associated with the identification and formalization of each of the foregoing constructs is discussed and further research avenues are explored. The model provides researchers and system developers with a means of studying both human and computer-based knowledge workers in organizations. Two types of communication support systems are defined.     

Group and Individual Decision Making for Task Performance Goals: Processes in the Establishment of Goals:in Groups1

The study examines the processes by which goals in groups are established. Performance goals and preferences for goals were stated by individuals acting alone, by groups deciding in unison, and by group members. All subjects performed a card-sorting task as individuals, and self-set goals were selected for expected levels of individual performance. Groups selected goals that were less difficult than individual goals on several occasions of goal setting. Analysis of the group goal decisions suggests that a success-based social comparison process occurs that implies groups select a goal slightly lower than the average of the member preferences so that the group members may appear successful. Analyses also indicated that the lower group goals arose quickly in the group interaction, and that group members readily adopted the lower goals as appropriate levels of performance. Discussion focuses on the observed differences among group, group member, and individual performance goals, and the ability of the success-based social comparison process to account for these differences.     

Decision Development in Computer-Assisted Group Decision Making

New computer technologies to aid group communication and decision making are becoming increasingly widespread. This study analyzes how one such technology, a group decision support system (GDSS), affected how group decisions developed over time. The study contrasted decision paths in groups using the GDSS with groups using the same procedural structures incorporated in the GDSS manually and with groups using no procedural structures. A flexible phase mapping method was employed to map group decision paths. The resulting set of seven decision paths varied in both sequence and number of decision phases. An optimal matching procedure was used to compute similarity measures among the 40 paths, and cluster analysis and multidimensional scaling were used to generate an empirical taxonomy of decision paths. Results indicated that the nature of decision paths varied both across the three conditions and within conditions. The decision path types were also related to three outcome variables: consensus change, perceived decision quality, and decision scheme satisfaction. Results indicated that those decision paths that most resembled logical normative sequences had superior outcomes to those that did not.     

Theories of Group Processes

Abstract

The New Experience for Survivors of Trauma (NEST) is a group psychotherapy intervention for clients traumatized by consequences of abuse, neglect, and pregnancy loss. This multiple site study is the first investigation of its effectiveness. Ninety outpatients from a naturalistic setting completed the Symptom Checklist and the Sense of Coherence questionnaire at baseline, end of treatment, and one-year follow-up. Effectiveness was tested with statistical significance, effect size, and clinical significance. Clients from the total sample as well as from the abortion subsample showed improvement at the end of treatment and at follow-up. Lack of a control group is balanced to some extent by the high ecological validity. The findings suggest that the NEST treatment may be beneficial for traumatized clients and call for further research.     

A Neural Network Model for Attribute-Based Decision Processes

We propose a neural model of multiattribute-decision processes, based on an attractor neural network with dynamic thresholds. The model may be viewed as a generalization of the elimination by aspects model, whereby simultaneous selection of several aspects is allowed. Depending on the amount of synaptic inhibition, various kinds of scanning strategies may be performed, leading in some cases to vacillations among the alternatives. The model predicts that decisions of a longer time duration exhibit a lower violation of the simple scalability law, as opposed to shorter decisions. Furthermore, the model is suggested as a general attribute-based decision module. Accordingly, various decision strategies are manifested depending on the module's parameters.     

Emergent Processes in Group Behavior

ABSTRACT— Just as neurons interconnect in networks that create structured thoughts beyond the ken of any individual neuron, so people spontaneously organize themselves into groups to create emergent organizations that no individual may intend, comprehend, or even perceive. Recent technological advances have provided us with unprecedented opportunities for conducting controlled laboratory experiments on human collective behavior. We describe two experimental paradigms in which we attempt to build predictive bridges between the beliefs, goals, and cognitive capacities of individuals and patterns of behavior at the group level, showing how the members of a group dynamically allocate themselves to resources and how innovations diffuse through a social network. Agent-based computational models have provided useful explanatory and predictive accounts. Together, the models and experiments point to tradeoffs between exploration and exploitation—that is, compromises between individuals using their own innovations and using innovations obtained from their peers—and the emergence of group-level organizations such as population waves, bandwagon effects, and spontaneous specialization.     

Decision Support for International Agreements Regulating Nanomaterials

Nanomaterials are handled in global value chains for many different products, albeit not always recognisable as nanoproducts. The global market for nanomaterials faces an uncertain future, as the international dialogue on regulating nanomaterials is still ongoing and risk assessment data are being collected. At the same time, regulators and civil society organisations complain about a lack of transparency about the presence of nanomaterials on the market. In the project on Sustainable Nanotechnologies (SUN, www.sun-fp7.eu ), a Decision Support System (SUNDS) has been developed, primarily for confidential use by risk and sustainability managers inside a company or consortium. In this article, we formulate a scenario concerning a potential role for an open access decision support system in negotiations on international agreements regulating trade in nanomaterials. The scenario includes design rules for decision support systems as well as procedures for use of such a system in stakeholder dialogue and policy-making on governance of these and other emerging technologies. This article incorporates analysis of results of stakeholder engagement on nanomaterials as well as literature and internet sources suggested by these stakeholders.     

Processes in Group Cognitive and Behavioral Treatment for Hoarding

Processes that emerge in the course of group treatment, such as universality and mutual aid, have been posited to promote therapeutic change (e.g., Yalom, 1995); however, they have received relatively little attention in the group cognitive behavioral treatment (CBT) literature (Rose, 2004). Group CBT interventions have been successful in alleviating symptoms of mood and anxiety disorders, such as major depression and obsessive-compulsive spectrum disorder (e.g., Anderson & Rees, 2007; Himle et al., 2001). A specialized group CBT protocol has been developed to treat hoarding (Muroff et al., 2009; Steketee & Frost, 2007), characterized by excessive clutter in the home, difficulty discarding objects that appear of little value, and often excessive acquisition, resulting in significant distress and/or impairment (Frost & Hartl, 1996). Individual (Tolin, Frost, & Steketee, 2007) and group (Muroff et al.) CBT for hoarding have shown promising effects. An examination of group process factors relevant to hoarding, however, is critical in order to further understand and tailor group interventions for this complex problem. The current paper characterizes four group processes specific to group CBT for hoarding: (a) universality or inclusion may reduce stigma and shame about having hoarding; (b) cohesion seems to support attendance and to provide positive peer pressure to motivate change; (c) the opportunity to give mutual aid seems to instill hope and motivate change; (d) social contact and socializing may reduce social isolation, a characteristic of this population. Discussion includes specific case examples illustrating these group processes and their potential complexity, within the context of group CBT for hoarding. Recommendations are advanced for future directions in evaluating group CBT for hoarding, particularly the formal study of group process variables with this population.     

Cognitive Diversity and Consensus in Group Decision Making: The Role of Inputs, Processes, and Outcomes

This study contributes to the new and growing body of research on shared cognition by examining how individuals entering a group decision-making context with different perspectives of the issues to be discussed arrive at cognitive consensus. Cognitive consensus refers to similarity among group members regarding how key matters are conceptualized and was operationalized as shared assumptions underlying decision issues in the present research. Utilizing 37 student groups participating in a multi-issue decision-making exercise, the study investigated antecedents and correlates of cognitive consensus. Results revealed that unanimity decision rule groups achieved more cognitive consensus than majority rule groups. In addition, group members inquiring concerning the reasons underlying others' decision preferences, accepting others' viewpoints as legitimate, and incorporating others' perspectives into their own interpretations of the issues was positively related to arriving at a greater degree of cognitive consensus. Cognitive consensus also positively influenced expectations regarding decision implementation and satisfaction.     

The Role of Decision Processes in Conscious Recollection

Dual-process models of recognition memory posit a rapid retrieval process that produces a general sense of familiarity and a slower retrieval process that produces conscious recollections of prior experience. The remember / know paradigm has been used to study the subjective correlates of these two processes, with remember judgments assumed to index conscious recollection and know judgments assumed to index familiarity. Recently, a two-criterion signal detection model has been proposed as an alternative account of this paradigm. This model assumes only a single memory process with a criterion remember from know responses. This report presents an empirical test of the model's critical prediction that manipulations that influence criterion placement should influence both remember and know judgments. An experiment confirmed this prediction, demonstrating that subjects who were told that 70% of the test items were study items produced more remember and know responses than subjects who were told that 30% of the test items were study items.     

Leadership and Regressive Small Group Processes: A Case Study

The psychoanalytic literature of regressive group and intergroup processes is reviewed briefly and selectively to derive principles of effective, working group leadership. These principles are applied to a case study of the leadership provided by Terje Larsen to the unique work group of Palestinians, Israelis, and Norwegians who produced the 1993 Oslo Peace Accords.     

Man as a Stabiliser of Systems: From Static Snapshots of Judgement Processes to Dynamic Decision Making

The feedback arrow extending from the response to the distal state in the lens model, together with Brunswik's dictum that the organism is a stabiliser of systems, implies a dynamic view of behaviour. This paper describes the main problems in the study of dynamic decision making: feedback delays and the feedback structure of the tasks. It also describes microworlds, a methodology for studying dynamic decision making in the laboratory. The results from experiments with microworlds show that subjects have problems compensating for feedback delays and side effects. These results are discussed in terms of Brunswik's distinction between perception and thinking.     

Absolute and Relative Decision Processes in Eyewitness Identification

A prominent and long-standing theory of eyewitness identification decision making distinguishes between absolute judgments, based on the lineup members' match to the witness's memory of the perpetrator, versus relative judgments, based on match values relative to other lineup members. This distinction was implemented in a computational model and simulations showed that the model predicts an accuracy advantage for absolute judgments over relative judgments under some conditions. The present experiment tested this prediction by evaluating the accuracy of witnesses instructed to use relative or absolute rules. Contrary to predictions, the overall analysis did not show an absolute advantage. Additional exploratory analyses showed a relative advantage when the suspect was surrounded by high-similarity foils. These results are consistent with a model that assumes that side-by-side comparisons of lineup members increase diagnostic accuracy by allowing witnesses to give greater weight to more diagnostic features and less weight to less diagnostic features.