Stress and technological innovation: A comparative study of design practices and implementation strategies

Abstract

The implementation of new technology in the workplace is a highly problematic process. New computer systems are often associated with adverse changes in the quality of working life: raised stress levels, impaired job satisfaction, increased routinization, and so on. This article reports a comparative analysis of two projects involving the computerization of control-room operations in two ambulance services: London and Manchester. The two outcomes were strikingly different. In the London case, severe operational problems led to the abandonment of the project. In contrast, the article reports a psychophysiological evaluation of the Manchester project which showed that the new system led to both superior service levels and to reduced levels of stress. In particular, it was shown that control staff responded to high levels of workload with lower systolic blood pressure and subjective anxiety.

The contrasting outcomes of the two projects are attributed to two main sets of factors: managerial and technical. The technical design philosophy at Manchester was “user centred”; it embraced what may be called a “tool paradigm”, where the aim of technological innovation is to support and augment the role of the human operator. In contrast, the London project was highly Tayloristic, with the accent on replacing unreliable human labour by an automated system. The way the implementation process was managed at Manchester (strong leadership, user involvement) was also notably different from the London experience (weak project management, poor industrial relations). These findings suggest that human-centred principles can provide a highly effective foundation for design, but careful management of the implementation process is also required if ITprojects are to be brought to successful fruition.     

A cost-benefit mechanism for selecting problem-solving strategies: Some extensions and empirical tests

Beach and Mitchell (Academy of Management Review 1978, 3, 439–449) proposed a contingency model for the selection of decision strategies in which the decision maker selected that strategy expected to result in the greatest net benefit (i.e., selection is based on a cost-benefit analysis). The perceived costs and benefits associated with each strategy are affected by various situational variables. Christensen-Szalanski (Organizational Behavior and Human Performance 1978, 22, 307–323) developed the selection mechanism in greater detail. The present paper extends that selection mechanism by proposing a set of alternative assumptions underlying the mechanism and by proposing an expanded role for the variable time in the decision strategy selection process. In addition, the present paper presents the results of a study testing certain of the proposed extensions and the effects of time constraints, task complexity, and task significance on the selection of a decision strategy.     

Relationships between cognitive emotion regulation strategies and depressive symptoms: A comparative study of five specific samples

Aim of this study was to study relationships between cognitive emotion regulation strategies and depressive symptoms. Five specific samples (ranging from adolescents to elderly) were compared on their reported use of cognitive emotion regulation strategies (Rumination, Catastrophizing, Self-blame, Other-blame, Acceptance, Positive Reappraisal, Putting into Perspective, Positive Refocusing, Planning) and on the relationships between these strategies and symptoms of depression. Although remarkable differences were found in reported strategies, relationships between cognitive emotion regulation strategies and symptoms of depression were shown to be similar between the five groups.     

Calvinism and psychoanalysis: A comparative study

Summary Although the title of this essay suggests a comparison of psychoanalysis and Calvinism, I have chosen to compare primarily the two leaders of these movements. On many points they shared similar beliefs. Certain of these areas have been highlighted and discussed briefly: ascetic tendencies, work, religion, concepts of God and of man, actions as symptoms, and predestination and determinism.     

Evaluating clinical significance: Incorporating robust statistics with normative comparison tests

The purpose of this study was to evaluate a modified test of equivalence for conducting normative comparisons when distribution shapes are non‐normal and variances are unequal. A Monte Carlo study was used to compare the empirical Type I error rates and power of the proposed Schuirmann–Yuen test of equivalence, which utilizes trimmed means, with that of the previously recommended Schuirmann and Schuirmann–Welch tests of equivalence when the assumptions of normality and variance homogeneity are satisfied, as well as when they are not satisfied. The empirical Type I error rates of the Schuirmann–Yuen were much closer to the nominal α level than those of the Schuirmann or Schuirmann–Welch tests, and the power of the Schuirmann–Yuen was substantially greater than that of the Schuirmann or Schuirmann–Welch tests when distributions were skewed or outliers were present. The Schuirmann–Yuen test is recommended for assessing clinical significance with normative comparisons.     

Neuroevolution-based autonomous robot navigation: A comparative study

The field of neuroevolution has achieved much attention in recent years from both academia and industry. Numerous papers have reported its successful applications in different fields ranging from medical domain to autonomous systems. However, it is not clear which evolutionary optimization techniques lead to the best results. In this paper, multilayer perceptron (MLP) neural networks (NNs) are trained and optimized using four advanced bio-inspired evolutionary algorithms (EA). The algorithms are Multi-Verse Optimizer (MVO), Moth-flame optimization (MFO), Cuckoo Search (CS) and Particle Swarm Optimization (PSO). Each algorithm is equipped with two operators: evolutionary population dynamics and mutation, which impact on exploration and exploitation. Optimized MLPs are then used for the navigation of an autonomous robot. Accuracy and area under the curve metrics are used for the evaluation and comparison metrics. Moreover, two well-regarded gradient descent algorithms including Back propagation (BP) and Levenberg Marquardt (LM) are utilized to validate the results obtained by evolutionary-based MLP trainers. It is observed that MLPs developed using MFO are the most robust ones among MLPs trained using other evolutionary and gradient descent algorithms.     

Associative memory or algorithmic search: a comparative study on learning strategies of bats and shrews

Two common strategies for successful foraging are learning to associate specific sensory cues with patches of prey ("associative learning") and using set decision-making rules to systematically scan for prey ("algorithmic search"). We investigated whether an animal's life history affects which of these two foraging strategies it is likely to use. Natterer's bats (Myotis nattereri) have slow life-history traits and we predicted they would be more likely to use associative learning. Common shrews (Sorex araneus) have fast life-history traits and we predicted that they would rely more heavily on routine-based search. Apart from their marked differences in life-history traits, these two mammals are similar in body size, brain weight, habitat, and diet. We assessed foraging strategy, associative learning ability, and retention time with a four-arm maze; one arm contained a food reward and was marked with four sensory stimuli. Bats and shrews differed significantly in their foraging strategies. Most bats learned to associate the sensory stimuli with the reward and remembered this association over time. Most shrews searched the maze using consistent decision-making rules, but did not learn or remember the association. We discuss these results in terms of life-history traits and other key differences between these species. Our results suggest a link between an animal's life-history strategy and its use of associative learning.     

孔子与亚里士多德的朋友观之比较

Before and during the times of Confucius and Aristotle, the concept of friendship had very different implications. This paper compares Confucius’ with Aristotle’s thoughts on friendship from two perspectives: xin 信 (fidelity, faithfulness) and le 乐 (joy). The Analects emphasizes the xin as the basis of friendship. Aristotle holds that there are three kinds of friends and corresponding to them are three types of friendship. In the friendship for the sake of pleasure, there is no xin; in the legal form of friendship for the sake of utility, xin is guaranteed by law; and in the moral form of friendship for the sake of utility, xin is guaranteed by morality; in the friendship for the sake of virtue, xin is an indispensable part. Both thinkers believe friends can bring joy to human life. According to Confucius, it is the joy of rendao 仁道 (benevolence), whereas for Aristotle, it is the joy of Reason. There are many commonalities and differences between the two. The commonalities reveal some inner links between Confucian rendao and Aristotelian Reason. It seems that the differences between rendao and Reason are the differences between moral reason and logical reason. The comparative study is helpful for us to understand the two masters’ ethics, politics and philosophy. Translated from Lunlixue Yanjiu 伦理学研究 (Research in Ethics), 2006, (1): 47–52     

A comparative study of association measures

This paper discusses the general problem of measuring the association between an independent nominal-scaled variableX and a dependent variableY whose scale of measurement may be interval, ordinal or nominal. The theoretical foundations of a wide range of asymmetric association measures are discussed. Some new measures are also suggested. Fifteen of these association measures, some previously suggested, some new, are singled out for a computer-assisted numerical study in which we compute the value actually taken by each measure under a wide variety of conditions. This comparative study provides important insights into the behavior of the measures.     

The behavioural treatment of sexual inadequacy: A comparative study

Thirty-six couples complaining of sexual difficulties were treated with one of three methods: (1) systematic desensitisation plus counselling. (2) directed practice—based on that of Masters and Johnson—plus counselling. (3) directed practice with minimal contact. Both members of each couple were seen together, but half in each treatment group were treated by a single therapist and half by a therapist pair. Differences in outcome among the groups were not highly significant, but consistent trends were found which suggested that the combination of directed practice and counselling was associated with most change, particularly when two therapists were involved.     

Multifractal analyses of response time series: A comparative study

Response time series with a non-Gaussian distribution and long-range dependent dynamics have been reported for several cognitive tasks. Conventional monofractal analyses numerically define a long-range dependency as a single scaling exponent, but they assume that the response times are Gaussian distributed. Ihlen and Vereijken (Journal of Experimental Psychology: General, 139, 436–463, 2010) suggested multifractal extensions of the conventional monofractal analyses that are more suitable when the response time has a non-Gaussian distribution. Multifractal analyses estimate a multifractal spectrum of scaling exponents that contain the single exponent estimated by the conventional monofractal analyses. However, a comparison of the performance of multifractal analyses with behavioral variables has not yet been addressed. The present study compares the performance of seven multifractal analyses. The multifractal analyses were tested on multiplicative cascading noise that generates time series with a predefined multifractal spectrum and with a structure of variation that mimics intermittent response time variation. Time series with 1,024 and 4,096 samples were generated with additive noise and multiharmonic trends of two different magnitudes (signal-to-noise/trend ratio; 0.33 and 1). The results indicate that all multifractal analysis has individual pros and cons related to sample size, multifractality, and the presence of additive noise and trends in the response time series. The summary of pros and cons of the seven multifractal analyses provides a guideline for the choice of multifractal analyses of response time series and other behavioral variables.     

Perceived effectiveness of school psychological services: A comparative study

In order to isolate variables present in school psychologists which may enhance effective delivery of school psychological service, supervisors of psychological services, classroom teachers, and building principals within the state of Iowa were asked to evaluate the performance of their school psychologist in 10 functional areas. Both supervisors and classroom teachers perceived those school psychologists with 4–9 years experience as the most effective. Teaching experience, as a requirement for school psychology certification, did not receive support. The level of training for the psychologist (degree) yielded conflicting results among the raters.     

The spread and impact of Cartesian philosophy in China: historical and comparative perspectives

Cartesian philosophy has had a profound influence on modern Chinese intellectuals since the mid 19^th century. After the May Fourth Movement, there have been many Chinese scholars who worked immensely on Cartesian philosophy and conducted fruitful research including translations, biographies, monographs, and a large number of papers. The examination of mind/body has been one of the most important philosophic issues and also a fundamental truth-searching of the various great thinkers, from Confucius and Socrates to many later Eastern and Western philosophers. There are certain similarities and distinctions between Confucian ‘mind/body’ and Cartesian ‘mind/body’. As a super country with the highest population in the world, the studies of Cartesian philosophy in China have been very inadequate; it should be more prosperous and successful.     

Early modulation of visual input: A study of attentional strategies

Despite agreement among many attentional theories that processing resources are limited and allocated according to task demands, controversy continues about the locus of selectivity. Studies of spatial orientation of attention suggest an early effect. These results, however, can be explained instead by effects of decision processes. The present study avoids this difficulty by directly manipulating attention in a dual-task paradigm and by using SDT to dissociate sensory tuning from criterion shifts. Ten subjects judged whether two lines to the left of fixation were the same or different in length; they also judged two lines presented simultaneously to the right. In a given block of 64 trials, the subject was to allocate 80%, 50%, or 20% of attention to one pair of lines and the rest to the other. On every trial, the subject judged both pairs. Results showed that d' increased from 0.77 with 20% allocation to 1.69 with 80%, indicating that sensitivity is modulated by attentional instructions. These results are predicted quantitatively by Luce's sample-size model.