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PubMed2006

Kinematics of the fingers and hands during computer keyboard use.

BACKGROUND: Although there has been extensive research about the kinematics of the neck, arm, and wrist during computer keyboarding, there is almost no information concerning the kinematics of the fingers, thumbs, and hands. The purpose of this descriptive study was to establish normative values of the kinematics of the fingers and hands during computer keyboard use. METHODS: This study describes the angles, angular velocities, and angular accelerations of the metacarpophalangeal joints and proximal interphalangeal joints for the right and left hands of 20 computer keyboard users during a word-processing task. A new kinematic variable for computer keyboard use, hand/wrist displacement, is also defined and examined. Hand/wrist displacement refers to the translational movements of the hands in which the entire hand is repositioned to strike the keys. Kinematics of both hands of the keyboard users were captured using a three-dimensional motion capture system. FINDINGS: Metacarpophalangeal joint kinematics in flexion/extension and abduction/adduction are reported during typing. Proximal interphalangeal joint kinematics in flexion/extension are also reported. The means and standard deviations for finger postures, velocities and acceleration were generally not significantly different between the right and left hands, with the exception of the 1st digit (thumb). Hand/wrist displacement was significantly different between the right and left hands for side to side movements. Differences in kinematics among the fingers are discussed in view of their potential to be a risk factor for musculoskeletal disorders. INTERPRETATION: This study establishes baseline understanding of the kinematics of computer keyboard use. This information will be useful in future studies of potential risk factors associated with keyboard use.

Adult↗
PubMed2006

Reading ability is negatively related to Stroop interference.

Stroop interference is often taken as evidence for reading automaticity even though young and poor readers, who presumably lack reading automaticity, present strong interference. Here the relationship between reading skills and Stroop interference was studied in a 7th-grade sample. Greater interference was observed in children diagnosed with reading disability (dyslexia) than in unimpaired children. Moreover, poorer reading skills were found to correlate with greater Stroop interference in the general school population. In correlation and regression analyses, interference was primarily associated with reading speed, with an additional unique contribution of reading accuracy. Color naming errors were few and not comparably related to reading skills. The relation of reading skill to Stroop interference was examined in computational modeling simulations. The production model of Roelofs [Roelofs, A. (2003). Goal-referenced selection of verbal action: modeling attentional control in the Stroop task. Psychological Review, 110, 88-125], in which interference is primarily due to word stimuli having direct access to word form encoding whereas color naming must pass through concept activation and lemma selection, was found to account well for the human data after imposing covariation constraints on parameters controlling word processing and blocking latency, in modifications not affecting the model's previous fit to other data. The connectionist model of Cohen, Dunbar, and McClelland [Cohen, J. D., Dunbar, K., & McClelland, J. L. (1990). On the control of automatic processes: a parallel distributed processing account of the Stroop effect. Psychological Review, 97, 332-361], in which interference is caused by differential route strength, implementing an automaticity account, approximated the observed patterns with network-wide parameter manipulations not specific to reading, such as processing speed and response threshold, likely to affect previously optimized performance. On the basis of the empirical and modeling data we argue for a direct link between reading skill and interference, beyond the effects of executive functioning.

Adolescent↗
PubMed2005

Nursing informatics knowledge and competencies: a national survey of nursing education programs in the United States.

An online survey of deans/directors of 266 baccalaureate and higher nursing programs in the U.S. was developed by informatics expert nurses. Participants (1) identified nursing informatics (NI) competencies and knowledge of undergraduate and/or graduate students in their nursing programs; (2) determined faculty preparedness to teach NI and to use informatics tools; and (3) provided perceptions of NI requirements of local practicing nurses. Frequency data and qualitative responses were analyzed. Approximately half of undergraduate nursing programs were teaching information literacy skills and required students to enter with word-processing and email skills. Least visible informatics content at all levels included the use of information system data standards, the Nursing Information and Data Set Evaluation Center criteria, the unified medical language system (UMLS), and the nurse's role in the life cycle of an information system. Almost 50% of respondents perceived faculty as "novice" and "advanced beginners" in teaching and using NI applications. Participants reported no future plans to offer NI training in their region. Findings have major implications for nurse faculty, staff developers, and program administrators who are planning continuing education opportunities and designing nursing curricula that prepare nurses for use of the electronic health record and 21st century professional practice.

Clinical Competence↗
PubMed2005

Results of a survey on medical error reporting systems in Korean hospitals.

BACKGROUND: Recent data suggest that medical injuries, or adverse events, represent an important international problem, and that many are caused by errors. Spontaneous reporting is the main tool used to detect errors and adverse events in most countries, and reporting systems are believed to be important for improving patient safety. Increasingly, such reporting can be done using information systems, and information systems are widely used in Korea. However, few data are available regarding the use of electronic medical error reporting systems in Korea. OBJECTIVES: The objectives of this study were to investigate the present status of reporting system of Korean hospitals, and to compare the current status of medical error reporting systems with that of other health information sub systems. METHODS: The chairs of nursing departments of all 283 hospitals nationwide with more than 100 beds were surveyed using a structured questionnaire. The response rate was 35%. In addition, two reports on the national use of health information systems in Korea from 1999 and 2003 were analyzed. RESULTS: Among reporting hospitals (n=99), medical errors were reported on paper in 75 hospitals (77%), verbally in 30 hospitals (30%), using word processing in 13 hospitals (13%), and using the hospital information system in only three hospitals (3%). In contrast, there was widespread and increasing use of health information technology (HIT) in areas such as medication administration, inpatient and outpatient order entry, and radiology. CONCLUSIONS: While HIT is increasingly widely used in Korea in many areas, it is not being used for error reporting. Increasing the use of electronic reporting systems, and systemically evaluating the medical errors and adverse events reported, represent essential steps for reducing systemic errors and improving patient safety.

Health Care Surveys↗
PubMed2004

The relationships between morphological and phonological errors in aphasic speech: data from a word repetition task.

Current theories of single-word processing predict that in some cases brain damage should selectively impair morphological processes, resulting in the selective occurrence of morphological errors. However, such a selective pattern of errors has never been documented, and the available case studies report the systematic association of morphological and phonological (segmental) errors in the same subject. The number of relevant case reports is very small, however. To better understand the relationship between morphological and phonological processes, we analyzed the repetition performance of 26 subjects who produced morphological errors in a screening battery for aphasia. Although the results confirm that subjects who make morphological errors also invariably make phonological errors, the probabilities of the two types of errors are not (quantitatively) correlated. Furthermore, the relationship between morphological and phonological errors was asymmetrical: although all subjects who produced morphological errors also produced phonological errors, some aphasics who produced phonological errors did not also produce morphological errors. The one-way relationship between morphological and phonological errors could result either from the anatomical proximity of the structures involved in morphological and phonological processes, or from the functional inseparability of the two processes. The fact that phonological errors can occur either in isolation or in association with morphological errors could be attributed to the functional heterogeneity of phonological errors, and to the separability of the neural substrates involved in processing various aspects of phonological information.

Adult↗
PubMed2005

Perhaps correlational but not causal: no effect of dyslexic readers' magnocellular system on their eye movements during reading.

During reading, dyslexic readers exhibit more and longer fixations and a higher percentage of regressions than normal readers. It is still a matter of debate, whether these divergent eye movement patterns of dyslexic readers reflect an underlying problem in word processing or whether they are - as the proponents of the magnocellular deficit hypothesis claim - associated with deficient visual perception that is causal for dyslexia. To overcome problems in the empirical linkage of the magnocellular theory with reading, a string processing task is presented that poses similar demands on visual perception (in terms of letter identification) and oculomotor control as reading does. Two experiments revealed no differences in the eye movement patterns of dyslexic and control readers performing this task. Furthermore, no relationship between the functionality of the participants' magnocellular system assessed by the coherent motion task and string processing were found. The perceptual and oculomotor demands required during string processing were functionally equivalent to those during reading and the presented consonant strings had similar visual characteristics as reading material. Thus, a strong inference can be drawn: Dyslexic readers do not seem to have difficulties with the accurate perception of letters and the control of their eye movements during reading - their reading difficulties therefore cannot be explained in terms of oculomotor and visuo-perceptual problems.

Adolescent↗
PubMed2006

The IOVP effect in mindless reading: experiment and modeling.

Fixation durations in reading are longer for within-word fixation positions close to word center than for positions near word boundaries. This counterintuitive result was termed the Inverted-Optimal Viewing Position (IOVP) effect. We proposed an explanation of the effect based on error-correction of mislocated fixations [Nuthmann, A., Engbert, R., & Kliegl, R. (2005). Mislocated fixations during reading and the inverted optimal viewing position effect. Vision Research, 45, 2201-2217], that suggests that the IOVP effect is not related to word processing. Here we demonstrate the existence of an IOVP effect in "mindless reading", a z-string scanning task. We compare the results from experimental data with results obtained from computer simulations of a simple model of the IOVP effect and discuss alternative accounts. We conclude that oculomotor errors, which often induce mislocalized fixations, represent the most important source of the IOVP effect.

Adult↗
PubMed2000

Sentence reading: do we make use of orthographic cues in homophones?

Starting from the finding that currently phonological models of visual word processing predominate, we examined what happened when important morphological information is disclosed in the orthography but not in the phonology. To do so, we made use of a peculiarity in Dutch. In this language, some forms of the present and the past tense of verbs are homophones or homographs. This allowed us to look at the power of orthographic and phonological cues to derive the tense of the verb. Two experiments showed that orthographic cues alone suffice to recover the tense of the verb, and that this recovery does not take more time than tense recovery on the basis of a combination of orthographic and phonological cues. On the basis of these results, we conclude that orthographic cues in homophones are very efficient during silent reading. Our findings, however, do not allow us to conclude whether this is due to a direct route from orthography to meaning, or to a specialised, morpho-syntactic back-up strategy elicited by certain sequences of letters.

Analysis of Variance↗
PubMed2001

Effect of visual display terminal height on the trapezius muscle hardness: quantitative evaluation by a newly developed muscle hardness meter.

The aim of this study was to determine trapezius muscle hardness in 9 healthy volunteers before and after word processing tasks with a video display terminal (VDT) at three different heights. When using a desktop personal computer (PC), no change was observed in muscle hardness even after a 30-min task if a subject was in the reference posture with a declination angle formed by the Reid's line directed toward the upper edge of the PC screen and the horizontal plane within 5-10 degrees. However, an increase in muscle hardness was observed after a 15-min task in a posture of looking up at the screen (angle of elevation: 15-20 degrees) and after a 30-min task in a posture of looking down at the screen (angle of declination: 15-20 degrees). When the same tasks were performed with a notebook PC, muscle hardness increased after 15 min. Fifteen minutes of relaxation exercise reduced the muscle hardness caused by VDT work.

Adult↗
PubMedDate not supplied

Computer mouse or Trackpoint--effects on muscular load and operator experience.

The aim of the study was to evaluate four different modes of human-computer interaction. The modes were: use of the keyboard alone as input device, use of keyboard and mouse, use of keyboard and mouse with a three-dimensional arm support, and use of a keyboard with a Trackpoint device in its centre. Ten women and 10 men volunteered to participate. Questions asked were whether working in the different modes influenced shoulder and forearm muscular load differently during word processing, and how much strain on the neck, shoulder and arms subjects perceived in the different modes. Muscular load was studied with electromyography in three shoulder muscles and three forearm muscles. The subjects also rated the different modes in one questionnaire concerning perceived strain and in one concerning preference for any of the modes tested. Intra-individual analysis for each muscle and mode showed two possible ways of decreasing the strain from computer mouse work on the shoulder muscles--either to use Trackpoint or to use the mouse combined with the movable arm support. However, both of these computer-interaction modes increased the muscular load in the hand and forearm.

Adult↗
PubMed1997

Associative and semantic priming effects occur at very short stimulus-onset asynchronies in lexical decision and naming.

Prior research has found significant associative/semantic priming effects at very short stimulus-onset asynchronies (SOAs) in experimental tasks such as lexical decision, but not in naming tasks (however, see Lukatela and Turvey, 1994). In this paper, the time course of associative priming effects was analyzed a several very short SOAs (33, 50, and 67 ms), using the masked priming paradigm (Forster and Davis, 1984), both in lexical decision (Experiment 1) and naming (Experiment 2). The results show small--but significant--associative priming effects in both tasks. Additionally, using the masked priming procedure at the 67 ms SOA. Experiments 3 and 4, shows facilitatory priming effects for both associatively and semantically (unassociated) related pairs in lexical decision and naming tasks. That is, automatic priming can be semantic. Taken together our data appear to support interactive models of word recognition in which semantic activation may influence the early stages of word processing.

Adult↗
PubMed1996

AN electronic bulletin board for instruction in reproductive endocrinology in a residency in obstetrics and gynecology.

OBJECTIVE: To explore the role of an electronic bulletin board as a means of computer-based learning in reproductive endocrinology for residents in obstetrics and gynecology. DESIGN: An electronic bulletin board was networked to all residents to present a formal lecture series in reproductive endocrinology and an informal question, answer, and discussion session after each lecture. Ten lectures were presented, one each month, throughout the academic year followed by question, answer, and discussion sessions. All lectures could be stored in an electronic file folder or printed as hard copy for review. A questionnaire was distributed at the conclusion of the project to assess previous resident experience with computers, resident response to, and utilization of the bulletin board. SETTING: A residency program in obstetrics and gynecology in a major medical center. PARTICIPANTS: Twenty-four residents in a 4-year program. MAIN OUTCOME MEASURES: Previous computer experience, ease of use, resident participation, and satisfaction with the bulletin board. RESULTS: Sixty-five percent of the residents considered themselves computer literate and 33 percent previously had taken a course in computer technology. Computer experience in word processing, spreadsheet, and database management was related by 55 percent, 40 percent, and 25 percent of the residents, respectively. Ninety-five percent of the residents accessed the bulletin board for the lectures and found this system a convenient means of review. Sixty percent reviewed the lectures and stored them in an electronic file folder for later review. Forty percent printed the lecture on hard copy. On a scale of 1 to 5 (1 = lowest; 5 = highest), overall resident satisfaction was high at 4.5. CONCLUSION: Our data suggest a potential role for electronic bulletin boards as a complement to standard teaching protocols in resident education. The relative ease of use and satisfaction suggest that these techniques are feasible and offer an effective method of on-line instruction.

Computer Communication Networks↗
PubMed1997

Word fluency after a right-hemisphere lesion.

Joanette and Goulet (Neuropsychologia, 1986, 24, 875-879) reported that right-handed patients suffering from a right-hemisphere stroke were impaired on semantic but not on orthographic criteria when they were submitted to a word fluency task. The interpretation of this dissociation was that the right hemisphere would subtend a particular contribution to the semantic component of word processing in right handers. The goal of the research reported here was to challenge this dissociation. In contrast with the first study, the production criteria were presented randomly and their level of productivity was a controlled factor. The semantic-orthographic dissociation was not replicated under these conditions.

Adult↗
PubMed1990

Micro-computers: availability to and use by trainees in public health medicine.

A survey of the availability to and use of micro-computers by public health medicine trainees was undertaken in February, 1989. Most departments have access to computers and trainees possess computing skills, but almost one in 15 trainees had no access to a micro-computer, and one trainee in eleven had no computing experience while a further one in eight had not progressed beyond word-processing. Departments of Public Health Medicine should review their computing resources and ensure that they are adequate for the challenges of the 1990s.

Computer User Training↗
PubMed1996

Use of notebook computers for third-year surgical students.

BACKGROUND: Computer-aided instruction has become increasingly popular in medical education. Notebook computers (NCs) are attractive, convenient microcomputers. We hypothesized that use of NCs by third-year surgical students would enhance their performance of educational activities. METHODS: During the 1994-1995 academic year 25 student volunteers used NCs during the surgery clerkship. NC software included questions for self-examination, anatomy self-instruction program, word processing and electronic mail (e-mail) for recording and sending history and physicals (H & Ps) to faculty for review, and MEDLINE search software. Identical software was available to all students at on-campus computer centers. All students were asked to record the number of hours that they used the self-examination and anatomy programs, number of H & Ps performed and reviewed by faculty, and number of literature searches performed. NC users were interviewed regarding the value of NC use and their rating of software programs. RESULTS: NC users (n = 25) used the self-examination and anatomy programs more often, performed more literature searches, and had a greater percentage of their H & Ps reviewed by faculty compared with non-NC users (n = 143) (p < 0.05 for all outcomes). Most NC users agreed that NC use was enjoyable and valuable, and they believed that all students should have NCs during the surgery clerkship. Students rated software in order of preference: e-mail > self-examination > MEDLINE search > anatomy program. CONCLUSIONS: NC use enhanced performance of educational activities in the surgery clerkship. Effort toward developing educational software for surgical students is warranted because students are likely to use such programs.

Anatomy↗
PubMed1985

Use of the personal computer in clinical research.

Personal computers are quickly becoming items of everyday use. More physicians' offices are using computers for billing and patients' records. Others have purchased computers for their word processing capabilities. These computers can be used for archives of medical case records or to collect and collate data for clinical research. This article focuses on how we use a personal computer for organization and management of clinical research projects. Included is a description of how we organize a research project, gather data, write computer programs, enter data into the computer, and generate and display reports. The use of a template program and a personal computer permits creation of individual programs without the aid of a professional programmer. When a single data-management program is used, five or six research projects can be carried out at a cost comparable to that of one project using a large computer and professional programmers.

Computers↗
PubMed2003

Pervasive influence of semantics in letter and category fluency: a multidimensional approach.

We used multidimensional statistical procedures to study semantic and lexical processes underlying word retrieval in verbal-fluency performance. Forty healthy participants were given a two-choice letter task (i.e., generate items beginning with the letter 'A' or 'F', in any order) and a two-choice category task (i.e., generate animal or fruit names, in any order). Using correspondence analysis (CoA) and hierarchical clustering (HC), we found evidence of prominent semantic organization in both letter and category fluency. For example, a striking categorical segregation between animate and inanimate entities emerged during the letter task. Analysis of inter-item times revealed strong sequential priming effects in both tasks. Taken together, these results indicate that semantic facilitation is pervasive in word retrieval processes, even in the letter-fluency task, and therefore suggest that the traditional view of letter fluency as a purely phonemically based task should be revised. Finally, our findings may help explain patterns of verbal-fluency measures obtained in focal brain lesion patients.

Adult↗
PubMed1982

Microcomputer applications in retinal research.

A low cost microcomputer was used to: (1) word process and edit this manuscript, (2) create a patient file storage and retrieval system, (3) transcribe and store information from video display such as wide-angle fundus photographs and fluorescein angiograms, (4) plot data points in graphic display mode, (5) solve complex equations used to calculate intraocular tumor volumes, (6) search medical literature data bases, and (7) directly interface with sophisticated laboratory equipment performing complicated tasks such as multicomponent analysis and enzyme kinetics.

Computers↗