A non-linear utility theory with multiple objectives

The aim of this paper is to make optimum several objectives at the same time which would enable a measurement of utility for several possible alternatives. The problem is solved if a strong or weak dominance exists between the alternatives, otherwise a set of incomparable alternatives would be present. Therefore, indifference curve analysis offers the outcome but as these indifference loci are difficult to determine only the characteristics of this analysis are maintained viz. decreasing marginal utility, non-linearity and even non-convexity. Indifference and reference point theory with the Minkowski min–max-metric only respond to these characteristics. Also the problem of generating alternatives during the process is taken into consideration. © 1998 John Wiley & Sons, Ltd.     

Staff support in medical oncology: A problem-solving approach

Abstract

At a time of low morale the multidisciplinary staff working on a medical oncology rated the severity and frequency of problems arising in their working environment and their personal levels of stress and job satisfaction. An anonymous paper and pencil exercise was used to identify problems at work and possible solutions which staff then discussed as a group. Within four months some changes were implemented resulting in a significant reduction in problems on the unit and a commensurate improvement in morale. Interdisciplinary communication particularly benefited. This problem solving approach was useful in overcoming initial resistance to seeking a cooperative solution to shared problems at work.     

Some applications of problem-solving versus decision-making to management

Two contrasting views of decision theory and of problem solving are presented. One view is that the decision-maker is a problem solver with available alternatives from which to choose. The other view is that decision-making processes and those in problem solving differ in kind. In the latter view, decision making is the selection of an alternative; problem solving, the invention of an alternative different in meaningful ways from any previously existing. The distinctions between the two points of view are elaborated mainly in the context of conflict resolution. Illustrations are presented of applications of problem solving to potential conflict between a lecturer and an already hostile group; to conflict between departments in an organization; to confict between individuals and to internal incapacitating conflict of an individual. Additional illustrations are given of management problems not involving conflict. These offer choices between alternatives as well as the opportunity to resolve the choice through problem solving. The latter yielded solutions different from and superior to either existing alternative.     

Ageing and perceptual problem-solving: A response analysis approach

This study investigates the nature of age-related changes in performance on a perceptual maze test. A clear linear decline in overall level of performance was found in a cross-sectional study of 20- to 70-yr-old Ss. While some of this decline is due to slowing with age, a detailed analysis of specific components of Ss' response pathways also revealed certain qualitative changes. Although there was no significant evidence of reduced look-ahead or planning in the elderly, there was a clear increase in the proportion of straight-line responses and errors. In contrast to the performance of low-scoring younger Ss, the lower scores of older Ss are not due to their making more errors of all types since they show very selective changes in their response strategies on this task.     

Individual differences in perceptual problem-solving ability: A response analysis approach

This study investigates the performance of a large sample of eleven year olds on a perceptual maze task, which has the advantage that it can either be used as a psychometric test or a problem-solving task. The sample was trisected on the basis of the overall pass/fail score and the three ability level groups were compared with respect to their overall response paths and on specific binary decision configurations. Clear differences between the groups were found in the distribution of solution paths, even on quite simple items. Some reasons for these differences were derived from the analysis of the specific binary responses since the prevalence of certain types of errors and responses were found to be associated with level of ability. Explanations for the observed qualitative differences in maze solving are put forward together with a discussion of the viability of the experimental approach adopted.     

A person-centred approach to stress management

Stress is analysed from a phenomenological perspective in terms of how individuals evaluate the varying stressors in their lives. The basic philosophical tenets underlying the person-centred approach to therapy are outlined with its emphasis on the ability of the individual human organisms to heal and recover from dysfunction.     

It's a bet! A problem-solving approach promotes the construction of contingent agreements

Negotiators often have different expectations about the future. A contingent agreement, or a bet that makes the ultimate outcome dependent on some future event, builds on negotiators' differences. The authors argue that a problem-solving approach, in which negotiators thoroughly explore options to build on their differences, is most likely to construct contingent agreements. The authors explore two factors expected to influence this problem-solving approach, namely, negotiators' relational and accountability concerns. The authors argue when these considerations are imbalanced, negotiators are less likely to adopt a problem-solving style and construct a contingent agreement. To test this hypothesis, negotiators' relationships and accountability pressures were manipulated in two experiments. In Experiment 1, participants engaged in an integrative negotiation, allowing the authors to examine whether a contingent agreement was constructed and joint gain. Experiment 2 sought to replicate and extend the findings of Experiment 1 using a scenario study. Results across the two experiments support the authors' hypotheses.     

A structured approach to microcomputer system design

A simple “building block” philosophy for construction of high-performance microcomputer-based systems utilizing I/O functional definition and a structured implementation of MOS/LSI semiconductor devices.     

A multiple case study approach to work stress prevention in Europe

Work stress has become a major issue among European employees. The current practice of its prevention seems disappointing, as work stress prevention programmes are predominantly reactive and biased to the individual. The lack of organization-level intervention studies is a barrier to progress in reducing work-related stress. In addition to the “true experimental approach”, multiple case studies may provide an adequate research strategy for addressing the potential impact of stress interventions in organizations. The study aim was to obtain more knowledge with respect to evidence-based work stress prevention in Europe, by focusing on both content (cause-effect relationships) and process (“how”). Therefore it was decided: (1) to collect from each European Union member state a work stress intervention study; (2) to analyse each of these cases as to content and process factors; and (3) to systematically compare these studies in a step-by-step approach. Through a network approach, 11 cases were identified. Nine projects received an acceptable methodological standard and were included in this study. Evaluation of these cases reveals that stress prevention is no “one time event”, nor merely a technical process. It is concluded that “true prevention” (i.e., preventive measures that are based on an adequate diagnosis identifying risk factors and risk groups, which theoretically and logically fit in with the problems, and which are introduced and implemented in a proper way) may be beneficial to both the employee and the organization.     

Further evaluation of a nonsequential approach to studying operant renewal

Basic‐laboratory assessments of renewal may inform clinical efforts to maintain reduction of severe destructive behavior when clients transition between contexts. The contextual changes arranged during standard renewal procedures, however, do not necessarily align with those that clients experience during outpatient therapy. More specifically, clients transition between clinical (associated with extinction for target behavior) and home/community (associated with reinforcement for target behavior) contexts during outpatient treatment. Standard renewal assessments do not incorporate these contextual alternations during treatment. The present experiment aimed to directly compare renewal of rats' lever pressing following a standard (“sequential”) ABA renewal procedure (i.e., baseline in Context A, extinction in Context B, renewal test in Context A) and a “nonsequential” renewal assessment wherein treatment consisted of daily alternation between Context A (associated with reinforcement for lever pressing) and Context B (associated with extinction). Lever pressing renewed to a greater extent for rats in the Nonsequential group than for rats in the Sequential group, suggesting the contextual changes that clients experience during outpatient treatment for severe destructive behavior may be a variable that is important to consider in translational research on renewal. Potential implications of these findings for basic and clinical research on renewal are discussed.     

A behavioral systems approach to adaptive computerized instructional design

A computerized multimedia instructional system has been developed that adheres to behavioral systems principles for presenting both adaptive programmed instructional materials and laboratory simulations. This instructional software system, called MediaMatrix, is both an authoring environment and a presentation vehicle that adapts the complexity of presentations in real time to changes in a student’s current rate of progress. It incorporates an automated knowledge-generation system that tracks all interactions between the user and any instructional objects within the system. Such knowledge is used both for a research database and for an artificial-intelligence engine that constructs an estimate ofconcept association networks (Verplanck, 1992a). Such networks reflect a learner’s developing knowledge and skill base, and may be used for tutorial advising during student use.     

A multiple-valued logic approach to the design and verification of hardware circuits

We present a novel approach, which is based on multiple-valued logic (MVL), to the verification and analysis of digital hardware designs, which extends the common ternary or quaternary approaches for simulations. The simulations which are performed in the more informative MVL setting reveal details which are either invisible or harder to detect through binary or ternary simulations. In equivalence verification, detecting different behavior under MVL simulations may lead to the discovery of a genuine binary non-equivalence or to a qualitative gap between two designs. The value of a variable in a simulation may hold information about its degree of truth and its “place of birth” and “date of birth”. Applications include equivalence verification, initialization, assertions generation and verification, partial control on the flow of data by prioritizing and block-oriented simulations. Much of the paper is devoted to theoretical aspects behind the MVL approach, including the reason for choosing a specific algebra for computations and the introduction of the notions of De Morgan Canonical Form and of verification complexity of Boolean expressions. Two basic simulation-based algorithms are presented, one for satisfying and verifying combinational designs and the other for equivalence verification of sequential designs.