Automated data collection for observed events (original) (raw)

Number entry interfaces and their effects on error detection

A significant amount of interaction involves number entry. The purpose of any number entry interface is to accurately select or set a numeric value. There are two main styles of number entry interfaces found on medical devices: serial interfaces like the ubiquitous 12-key numeric keypad, and incremental interfaces that use a knob or a pair of keys to increase or decrease numbers. We report an experiment that investigates the effect of interface design on error detection in number entry. The initial findings show that the incremental interface produces more accurate inputs than the serial interface, and the magnitude of errors suggests that the incremental interface could reduce the death rate relative to the numeric keypad.

Using Sequential Data Analyses to Determine the Optimum Layout for an Alternative Keyboard

Proceedings of the Human Factors and …, 2001

The standard QWERTY keyboard was developed over a hundred years ago. It is suspected to be involved in repetitive strain injuries, such as carpal tunnel syndrome (CTS). To reduce and eliminate many of the movements that are suspected to contribute to CTS, a new type of alphanumeric input based on the chording concept was designed. This AID-CTS keyboard is an alphanumeric input system that uses a pair of devices each comprised of an inverted dome upon which the hands rest. As a chordal device, the AID-CTS keyboard typing methodology entails creating a keystroke via a combination of positions of the two domes. The purpose of the current study was to determine a new character layout that would reduce the ergonomic impact of typing further. Two studies were conducted. In Study 1, we analyzed two-letter sequences using sequential, multi-way frequency analyses and established a listing of the most important two-letter transitions. In Study 2, we created a number of competing character layouts and analyzed them regarding their ergonomic impact. The studies resulted in an optimum layout that minimizes arm and wrist movements.

Relative keyboard input system

2008

Abstract This paper describes a" relative keyboard," where keystrokes are treated as inputs in a continuous space relative to each other, instead of a discrete, unambiguous sequence. A user with the ability to touch-type may type anywhere on the sensing surface without the need for a visual keyboard. An implementation of such a system is explored and evaluated on simulated data and real user data.

Selection-based virtual keyboard prototypes and data collection application

Behavior Research Methods, 2009

An emerging area of research in engineering psychology is the evaluation of text entry for mobile devices using a small number of keys for the control of cursor direction and character selection from a matrix of characters (i.e., selection-based data entry). The present article describes a software tool designed to reduce time and effort in the development of prototypes of alternative selection-based text-entry schemes and their empirical evaluation. The tool, available for distribution to researchers, educators, and students, uses Action Script code compiled into an executable file that has an embedded Adobe Flash Player and is compatible with most operating systems (including Microsoft Windows, Apple OSX, and Linux).

Character input interface for compact electronic devices

2004

A rotary interface for inputting text and other information that allows the user to quickly select and input large amounts of textual information into very small devices such as cell phones, hand-held or watch-sized PDAs, or other small devices with embedded processors where standard keyboard entry is untenable and where menu-driven selection and handwriting recognition-based character entry are non-optimal. The input interface includes three main components: a rotatable character or icon display in the form of a dial, a ring or ...

The problem of serial order in skilled typing

Journal of experimental psychology. Human perception and performance, 2014

We address the problem of serial order in skilled typing, asking whether typists represent the identity and order of the keystrokes they type jointly by linking successive keystrokes into a chained sequence, or separately by associating keystrokes with position codes. In 4 experiments, typists prepared to type a prime word and were probed to type a target word. We varied the overlap between the identity and order of keystrokes in the prime and the target. Experiment 1 tested whether the identity of keystrokes can be primed separately from their order. Experiments 2 and 3 tested whether keystroke positions can be primed out of sequence. Experiment 4 tested whether keystrokes are primed equally across serial positions. The results were consistent with chaining theories: Keystroke identities were not primed separately from their order, keystroke positions were not primed out of sequence, and priming was graded across the keystroke sequence and depended on the number of keystrokes that ...

A study on efficiency of input devices on native language numerical data entry

This study focuses on the efficiency of input devices like keyboard and mouse on numerical data entry in the contexts of semi urban or rural users from India. We address the question whether the input devices like keyboard and mouse differentially influence performance in native language numerical data entry. Numerical data entry is being done at various places in rural and semi-urban area of India. The user uses either keyboard or mouse for numerical data entry. A study was conducted using an experimental interface designed to examine the efficiency in terms of time required and errors made in native language (Marathi or Assamese) numerical data entry. Subjects from semi urban and rural India were given a task to perform. The task involved use of a calculator which was specifically designed for this experiment. This calculator takes input from keyboard as well as mouse in native languages. To calculate the efficiency, the computer based background recording of the data input has been taken. The results show that there is significant difference in use of input devices (keyboard and mouse) for native language numerical data entry by rural users.

Overlapping mental operations in serial performance with preview: Typing. A reply to Pashler

The Quarterly Journal of Experimental …, 1994

Pashler (this issue) concluded that the rate of responding in serial choice reaction tasks was controlled by a limit on simultaneous response selection rather than on simultaneous response execution. Film of a skilled typist shows that each finger movement starts as a key earlier in the sequence to be typed is struck (three earlier with words, two with orthographically legal non-words). Thus, her rate of responding is controlled by a limit on the number of responses that can be executed simultaneously, not by a limit on response selection.Preventing simultaneous response selection is one possible strategy for maintaining correct response order in serial tasks. It is suitable for tasks such as those studied by Pashler, where response selection is relatively slow and response execution is quick. Other strategies are more suitable for tasks where response selection is quick and response execution relatively slow and variable.

Comparison of keyboard, light pen and voice recognition as methods of data input

International Journal of Clinical Monitoring and Computing, 1988

There is an increasing requirement for doctors and nurses to interact with computers for clinical and administrative reasons. It is important to assess different methods of computer input to provide the most suitable type of input device for any particular application. A study was undertaken to compare three different input devices-standard 'QWERTY' keyboard, light pen, and voice recognition-for speed, errors and number of corrections during entry of patient admission data. Twenty intensive care nurses took part in the study and were asked to express their assessment of speed, accuracy, ease of use and preference.