The measurement of elements in an assembly task-the information output of the human motor system

The performance of three well-practised subjects on an assembly task was analysed using both an electrical contact technique and high-speed film recording. The task consisted of transferring a row of pegs into a parallel row of holes 8 inches away. There were four variations in the diameter of the holes presenting different degrees of difficulty. An information analysis of the output of the motor response, based on a formula suggested by Fitts, was applied to the data. Differences both in the measuring techniques and in the way the information analysis was applied raised problems which have an important bearing on the thesis of the constancy of human channel capacity and on the possible use of information measures in analysing motor tasks. Discrepancies between the photographic and the contact analysis as techniques for defining Movement Loaded and Positioning elements were examined. Whilst the contact analysis showed movement time increasing with decreasing target tolerance the film analysis showed gross movement time to be constant and the variation due to difficulty confined to the relatively small secondary positioning movement. An attempt to analyse the information load on gross and secondary movement respectively indicated that gross movement was made to an area of 2 in. in diameter about the actual target irrespective of its size and that secondary movement began as this target was entered. Values for information transmission rate were found to be constant when based on the individual element times from the photographic analysis but different transmission rates were found when calculations were based on overall times. Finally some assumptions underlying the formula are examined and it is pointed out that other rational assumptions when applied to these data would lead to results which would not support the thesis of the constancy of human channel capacity.     

Psychometric characteristics of a multidimensional measure to assess impairment: The Child and Adolescent Functional Assessment Scale

The Child and Adolescent Functional Assessment Scale (CAFAS) is a multidimensional measure of degree of impairment in functioning. Interrater reliability data are presented for lay raters, graduate students, and frontline staff. Reliability was high for the total score and behaviorally-oriented scales. Construct, concurrent, and discriminant validity were assessed with the sample of children and adolescents evaluated at the Fort Bragg Demonstration Evaluation Project. Youth and their caregivers were evaluated via interview and selfcompleted instruments at four time points. Significant correlations were found between the CAFAS and other related constructs. Concurrent validity was demonstrated by logistic regression analyses examining the relationship between CAFAS ratings and problematic behaviors endorsed on measures completed by parents, teachers, or the youth. Youth with higher CAFAS total scores were much more likely to have poor social relationships, difficulties in school, and problems with the law. Discriminant validity was assessed with a repeated measures analysis of variance with intensity of care at intake and time as factors. Youth who were inpatients or in residential treatment centers at intake had higher CAFAS scores than those who were outpatients. These findings provide strong evidence for the reliability and validity of the CAFAS.     

The Products of the Imagination: Psychoanalytic Theory and Postmodern Literary Criticism

This article considers some of the affinities between postmodern literary theory and the psychoanalytic theories concerned with intersubjective phenomena. Postmodern literary theory is described briefly, and it is argued that one of its major concerns is the nature of, and the political and cultural influences on, subjectivity and identity. Despite that, postmodernism generally, and literary postmodernism in particular, can be said to lack a theory of the psychological and interpersonal dimensions of the experience of self. This article contends that the more relational schools of psychoanalytic theory can provide an example of the construction of selfhood that is of importance to contemporary and postmodern literary criticism. The academy has, to a considerable extent identified psychoanalysis with the work of Jacques Lacan, but since the 1980s the work of such theorists as Jane Flax and Jessica Benjamin, building on the work of Nancy Chodorow, have increasingly opened up the possibilities of relational and object relations theory for literary studies. The relational psychoanalytic theories operate in the same epistemological universe as postmodern literary criticism, congruent with the postmodern idea of truth as constructed and relational, and selfhood as shifting, contingent, and always-in-process. Particular attention is paid to the work of Wilfred Bion, whose understanding of self provides an account both of the failure of meaning, and of the development of mind. Some examples of a relational approach to literary analysis are provided.     

THE VICTORIA INSTITUTE,BIBLICAL CRITICISM,AND THE FUNDAMENTALS

The Victoria Institute was established in London in 1865. Although billed as an anti‐evolutionary organization, and stridently anti‐Darwinian in its rhetoric, it spent relatively little time debating the theory of natural selection. Instead, it served as a haven for a specific set of intellectual commitments. Most important among these was the Baconian scientific methodology, which prized empiricism and induction, and was suspicious of speculation. Darwin's use of hypotheses meant that the Victoria Institute members were unconvinced that his work was truly scientific, but even more concerning for them was the specter of biblical criticism. This approach to biblical studies incorporated techniques from literary criticism, treating it as any other document. Since it also relied on hypotheses, the Victoria Institute members were similarly skeptical that biblical criticism was scientific, and spent much of their time attempting to refute it. In this way, they functioned as an incubator for the concerns that would animate the fundamentalist–modernist controversies of the early twentieth century.     

Spontaneous Interentity Coordination in a Dissipative Structure

Humans and other creatures display remarkable interorganism coordination. For ecological theorists, interorganism coordination poses a challenge because it appears to be an especially “representation-hungry” phenomenon (Clark, 1999 Clark, A. (1999). An embodied cognitive science? Trends in Cognitive Sciences, 3, 345–351.[Crossref], [PubMed], [Web of Science ®] , [Google Scholar]). Ecological researchers have proposed that interorganism coordination arises from fundamental laws of pattern formation and synchronization. A key example in support of the ecological approach to coordination is the phase locking of 2 or more weakly coupled metronomes. Here we provide a complementary example of interentity coordination in a system that is more closely analogous to living systems. We show that two self-organizing dissipative structures, coupled in a single electrical field, spontaneously exhibit fairly complex motion coordination. Further, the degree of coordination predicts the rate of entropy production for the system as a whole. We suggest that the complex behavior of motion coordination fulfills a rudimentary end-directedness of the system: evolve to states that create higher rates of entropy production.     

Games for health conference 2004: issues, trends, and needs unique to games for health.

The first-ever Games for Health Conference (Madison, WI, September 16-17, 2004) identified issues, trends, and needs unique to games for healthcare. More than 130 doctors, educators, therapists, and game makers gathered to share experiences particular to the health industry, health practitioners, and patient treatment. Co-sponsored by Games for Health, Project of the Serious Games Initiative, the Academic ADL Co-Lab, and the Federation of American Scientists, the conference highlighted applications for direct patient care and therapy, as well as health education, policy, and management ideas. This paper presents key concepts from the conference's panel discussions and summarizes successful projects demonstrated at the conference that can serve as models for the field.     

Can I Make a Difference? Efficacy,Employment, and Disability

Political efficacy is a widely studied phenomenon and an important predictor of political participation, but little is known about the political efficacy of the millions of people with disabilities in the United States. This paper reports the results of a nationally representative telephone survey of 1,240 people—stratified to include 700 people with disabilities—following the November 1998 elections. Several measures of efficacy that help predict political activity were found to be significantly lower among people with disabilities than among otherwise similar people without disabilities. Although lower levels of internal efficacy and civic skills could largely be explained by educational and employment gaps, lower levels of other variables (external efficacy, perceived influence of people with disabilities, and perceived treatment of people with disabilities) remained after applying a wide range of controls, indicating that people with disabilities are less likely to see the political system as responsive to them. This perception is concentrated among non–employed people with disabilities. The lower efficacy levels linked to "disability gaps" in employment, income, education, and group attendance appear to account for as much as half of the disability political participation gap; hence, policies intended to increase employment and educational opportunities for people with disabilities have potentially important political effects.     

Use of the CAFAS to Evaluate Outcome for Youths with Severe Emotional Disturbance Served by Public Mental Health

Outcomes are reported for youths with serious emotional disturbance receiving customary services from community mental health service providers who receive state mental health funds. Various outcome indicators for the Child and Adolescent Functional Assessment Scale (CAFAS) are described, as well as a procedure for categorizing youths into client types based on the CAFAS subscale scores. The youth's intake assessment was compared to the last CAFAS evaluation that the youth received. A statistically significant reduction in mean CAFAS total score was observed for the entire sample and for each client type. In addition, the mean number of subscales on which the youth was rated as severely impaired significantly decreased for the total sample and for each client type. The proportion of youths who experienced a clinically meaningful improvement in functioning was 58.6%. For the subset of youths who were rated as severely impaired on one or more subscales at intake, 53.1% left services without any severe impairments. The pattern of outcome results differed for subgroups based on type and extent of impairment. Implications of these findings and suggestions for using outcome monitoring to improve services in the public mental health sector are discussed.     

Addressing issues of workplace harassment: counseling the targets

Workplace violence has recently received attention because of the killing of several individuals by their coworkers. However, more common are passive and nonfatal forms of aggressive behavior that are manifested as psychological and emotional harassment. Workplace harassment includes dysfunctional personal interactions characterized by bullying behaviors, personal attacks, and attempts to denigrate others. Targets of workplace harassment may experience stress, depression, low self‐esteem, loss of sleep, and even posttraumatic stress disorder. Strategies that counselors can use to work effectively with targets are discussed.     

“Watch out!”: Effects of instructed threat and avoidance on human free‐operant approach–avoidance behavior

Approach–avoidance paradigms create a competition between appetitive and aversive contingencies and are widely used in nonhuman research on anxiety. Here, we examined how instructions about threat and avoidance impact control by competing contingencies over human approach–avoidance behavior. Additionally, Experiment 1 examined the effects of threat magnitude (money loss amount) and avoidance cost (fixed ratio requirements), whereas Experiment 2 examined the effects of threat information (available, unavailable and inaccurate) on approach–avoidance. During the task, approach responding was modeled by reinforcing responding with money on a FR schedule. By performing an observing response, participants produced an escalating “threat meter”. Instructions stated that the threat meter levels displayed the current probability of losing money, when in fact loss only occurred when the level reached the maximum. Instructions also stated pressing an avoidance button lowered the threat level. Overall, instructions produced cycles of approach and avoidance responding with transitions from approach to avoidance when threat was high and transitions back to approach after avoidance reduced threat. Experiment 1 revealed increasing avoidance cost, but not threat magnitude, shifted approach–avoidance transitions to higher threat levels and increased anxiety ratings, but did not influence the frequency of approach–avoidance cycles. Experiment 2 revealed when threat level information was available or absent earnings were high, but earnings decreased when inaccurate threat information was incompatible with contingencies. Our findings build on prior nonhuman and human approach–avoidance research by highlighting how instructed threat and avoidance can impact human AA behavior and self‐reported anxiety.