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PubMedDate not supplied

Modulation of semantic processing by spatial selective attention.

The effects of spatial selective attention upon ERPs associated with the processing of word stimuli were investigated. While subjects maintained central eye fixation, ERPs were recorded to words presented to the left and right visual fields. In each of 6 runs, subjects focussed attention to alternate fields to perform a category-detection task. Pairs of semantically related and repeated words were embedded in the word lists presented to the attended and unattended visual fields. Consistent with prior studies, the P1-N1 visual ERP was larger when elicited by words in attended spatial locations. A large negative slow wave identified as N400 was elicited by attended, but not unattended, words. For attended words, N400 was smaller for semantically primed or repeated words. We concluded that spatial selective attention can modulate the degree to which words are processed, and that the cognitive processes associated with N400 are not automatic.

Adolescent↗

PubMed1986

Multilingual translation techniques in the analysis of narrative medical text.

The feasibility of computer translation of scientific and medical documents is controversial. This report describes a minicomputer-based translation system (TRANSOFT) that employs word order rearrangement followed by word-for-word translation and resolution of ambiguities based on context. This translation system was applied to an entire medical textbook written in German and to short medical texts written in French, Italian, Spanish and Turkish. Results suggest the versatility of TRANSOFT for narrowly defined translation problems. As foreign language medical documents and medical records become increasingly available in computer readable form through word processing, computerized typesetting and hospital information systems, computer translation methods may provide a rapid and inexpensive means of obtaining draft translations.

Computers↗

PubMed1991

Neuronal activity in frontal speech area 44 of the human cerebral cortex during word recognition.

The activity of neurons was recorded from cortical speech area 44 of human patients with diagnostic and/or therapeutical depth electrodes while they were performing word recognition and object naming tasks. Some cells responded selectively to either semantic or phonological aspects of word processing with the same latency, others responded consecutively to both semantic and phonological features. The present finding provides the first demonstration of neuronal mechanisms in frontal language cortex and evidences that both consecutive and parallel processing of these speech signs occur in neuronal activity of this area.

Frontal Lobe↗

PubMedDate not supplied

Applications of an inexpensive microcomputer for the general radiologist.

Computer programs of interest to the general radiologist have been written by the author and others for an inexpensive microcomputer. Most of these programs are in the public domain and include: computer-assisted diagnosis; computer-assisted medical education; Bayesian analysis, general statistical analysis; word processing; and radiographic image analysis. Previously, computerized functions such as these have been limited to those with access to a large institutional computer. Due to the general availability of inexpensive microcomputers, the average radiologist or group can now afford the many benefits a computer can add to the practice of radiology.

Computer-Assisted Instruction↗

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↗

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↗

PubMed2002

Effect of negative air ions on computer operation, anxiety and salivary chromogranin A-like immunoreactivity.

The effects of negative air ions on computer operation were examined using a biochemical index of the activity of the sympathetic/adrenomedullary system (i.e. salivary chromogranin A-like immunoreactivity (CgA-like IR)) and a self-report questionnaire (State-Trait Anxiety Inventory, Anxiety State--STAI-S). Twelve female students carried out a word processing task for 40 min. The salivary CgA-like IR increased more than three times on the task, but the salivary cortisol did not change. The increase in the CgA-like IR level was attenuated by the exposure to negative air ions during the task. The exposure to the ions during the recovery period following the task was effective for rapidly decreasing the CgA-like IR level that had increased after the task. These effects by negative air ions were also observed using STAI-S. Task performance was slightly but significantly improved by the presence of negative air ions. These results suggest that negative air ions are effective for the reduction of and the prompt recovery from stress caused by computer operation.

Adolescent↗

PubMed1986

Computer applications in veterinary medical education.

This is a review of the various computer applications used in veterinary medical education. The various applications include drill-and-practice, tutorial, problem-solving, testing, educational management programs, educational games, word processing, educational utilities, authoring programs, and simulations.

Computer-Assisted Instruction↗

PubMed1986

Building a practice with a computer.

It should be emphasized that the primary function of the computer is information-handling and communication. It remembers who and when and why, organizes the information, and then communicates by reminders, letters, labels, word processing, and statements. The computer becomes a faithful employee, not altogether immune from physical illness but generally ready to work at the flip of a switch. Best of all, the computer never asks for overtime or a percentage of the profits.

Animals↗

PubMedDate not supplied

Semantic information is used by a deep dyslexic to parse compounds.

We report a case study of a 48 year-old patient, J.O., who was tested 20 years after the removal of a tumor in the left temporal-parietal region. This surgery and subsequent radiation resulted in right side paralysis and numerous language problems. Tests of J.O.'s single word reading abilities indicate that she could be classified as a deep dyslexic with over 16% of her errors in word naming having a clear semantic relationship with the target word (Coltheart, 1980). We examined her ability to read compound words aloud and following Libben (1993) we provide evidence that J.O. is a second case in which there is obligatory access of morphological constituents of compound words. These data are discussed within the context of Libben's (1998) compound word processing model.

Aphasia↗