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Human Factors Psychology Commons™

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Articles 61 - 71 of 71

Full-Text Articles in Human Factors Psychology

The Effects Of Task Partitioning And Computer Skill Level On Operator Engagement And Performance In An Adaptive Biocybernetic Environment, Todd Michael Eischeid Oct 1997

The Effects Of Task Partitioning And Computer Skill Level On Operator Engagement And Performance In An Adaptive Biocybernetic Environment, Todd Michael Eischeid

Psychology Theses & Dissertations

The present study examined task partitioning in an adaptive environment, utilizing the cybernetic closed-loop system of Pope et al. (1995). In that study, participants either performed a tracking task (manual condition) or monitored the tracking task (automatic condition). Changes in task mode were driven by an engagement index derived from the participant's EEG and operated under either positive or negative feedback conditions. One goal of the present study was to examine participant performance under a wider range of tracking conditions. Specifically, the task was partitioned into 3 modes: a manual mode, a partitioned mode, and an automatic mode. A second …

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A Bio-Cybernetic System For Regulating Operator Engagement In An Adaptively Automated, Multi-Task Flight Environment, Lawrence J. Prinzel Iii Jul 1995

A Bio-Cybernetic System For Regulating Operator Engagement In An Adaptively Automated, Multi-Task Flight Environment, Lawrence J. Prinzel Iii

Psychology Theses & Dissertations

A bio-cybemetic, closed-loop system was validated for use in an adaptively automated environment. Subjects were asked to perform either one task or three tasks from the MAT battery. EEG was continuously sampled while they performed the task and an EEG index was derived (20 beta/alpha + theta). The system made allocation decisions based upon the level of operator engagement as determined by the EEG index. The NASA-TLX was administered after each trial. The results of the study demonstrated that it was possible to moderate an operator's level of engagement through a closed-loop system driven by the operator's EEG. It also …

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Communicating With Graphic User Interfaces: A Comparison Of Menu Selection And Menu Bypass Techniques, Monty Lee Hammontree Jul 1991

Communicating With Graphic User Interfaces: A Comparison Of Menu Selection And Menu Bypass Techniques, Monty Lee Hammontree

Psychology Theses & Dissertations

The present study was conducted in two phases to determine design tradeoffs relating to command bar menu and bypass code-based techniques for interacting with computers. Forty eight subjects participated. In the first phase of the experiment, mouse-, chorded key-, and function key-based menu selection techniques were compared. It was found that menus were accessed much faster with spatially mapped function keys as compared to chorded key sequences or mouse inputs, and that relative to mouse inputs compatible letter keys lead to faster command selection times. Further, the function key-based technique yielded the fastest combined access and selection times, the fastest …

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The Effect Of Fear Of Success And Perceived Task Difficulty On Cognitive Performance, David Eugene Elkins Apr 1991

The Effect Of Fear Of Success And Perceived Task Difficulty On Cognitive Performance, David Eugene Elkins

Psychology Theses & Dissertations

This study investigated the relationship of fear of success (FOS) and perceptions of task difficulty, their interactive effect on anagram and matrix-task performance and possible gender differences on these variables. A total of 226 students, 83 males and 143 females, participated in the study. FOS was measured by the administration of Zuckerman and Allison's (1976) Fear of Success Scale. Perceptions of task difficulty were manipulated by use of falsified normative data. Subjects therefore believed the upcoming task was either easy or difficult or the subjects were employed as controls. An anagram task and 12 items selected from Raven's Standard Progressive …

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Validation Of The Human Factors Satisfaction Questionnaire, James Carlopio Jul 1990

Validation Of The Human Factors Satisfaction Questionnaire, James Carlopio

Psychology Theses & Dissertations

In order to predict behavior in organizations, it is important to understand and to consider both the individual employee and his/her interaction with the physical work environment. The main purpose of this research was to gather evidence of the validity of the Human Factors Satisfaction Questionnaire (HFSQ) in order to provide a tool with which employees' preceptions of several elements of their physical work environments can be measured. The physical work environment and its relationship to both organization theory and motivation theory is discussed. Evidence of the construct validity of the HFSQ was sought through the administration of the HFSQ …

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Hemispheric Effects Of Response Hand And Concurrent Auditory And Visual Information Processing On Task Performance, Paula J. Guerette Jul 1989

Hemispheric Effects Of Response Hand And Concurrent Auditory And Visual Information Processing On Task Performance, Paula J. Guerette

Psychology Theses & Dissertations

Previous research (cf. Wickens, Mountford & Schreiner, 1981; Wickens & Sandry, 1982) has suggested that performance is facilitated by maintaining "integrity" between the hemisphere of information input, processing, and motor response. This task-hemispheric integrity has been found to exist during concurrent performance of verbal and spatial tasks, both of which are presented in a visual modality. The present study sought to examine whether task-hemispheric integrity exists during concurrent performance of a verbal and a spatial task when the verbal task is presented in an auditory modality and the spatial task(s) are presented in a visual modality. Fifty-six individuals (28M, 28F) …

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The Effects Of Irrelevant Dimensions On The Predictive Value Of A Warning Signal, Ruth Justine Arnegard Oct 1988

The Effects Of Irrelevant Dimensions On The Predictive Value Of A Warning Signal, Ruth Justine Arnegard

Psychology Theses & Dissertations

Past research has neglected irrelevant dimensions of visual warning signals in choice reaction-time tasks. The present study examined the effects of an irrelevant dimension of a visual warning signal and that signal's value in predicting a response stimulus on choice reaction time. A warning signal, which was a geometric figure, appeared in the center of a VDT screen and was followed by one of two response stimuli (open circles). The predictive value of the warning signal was defined as the percentage of trials during which the warning signal accurately predicted the response stimulus by size and was manipulated in the …

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Natural Language Human-Computer Dialogue: Menu-Based Natural Language And Visual Performance, Jeffrey John Hendrickson Apr 1988

Natural Language Human-Computer Dialogue: Menu-Based Natural Language And Visual Performance, Jeffrey John Hendrickson

Psychology Theses & Dissertations

The present study was conducted to determine design principles for menu-based natural language (MBNL) interfaces and to provide evidence for the nature of visual search processes with menu-based systems. The effects of window size, window activity, and query length were investigated. Window size was manipulated as a between-subjects variable with three levels representing a sixteen-item window size, an eight-item window size, and a four-item window size. Window activity was manipulated as a within-subjects variable with two levels representing single active and multiple active windows. Query length was manipulated as a within-subjects variable with three levels representing one-, two-, and three-item …

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The Development Of A Paper-And-Pencil Measure Of Complex Cognitive-Perceptual Aptitude, Don Michael Mcanulty Jul 1986

The Development Of A Paper-And-Pencil Measure Of Complex Cognitive-Perceptual Aptitude, Don Michael Mcanulty

Psychology Theses & Dissertations

The primary purpose of the present research was a develop a complex aptitude test to assess individual differences in multiple cognitive and perceptual abilities that are required for helicopter pilot training. The paper-and-pencil test was designed to provide measures of both static and dynamic (i.e., learning) ability under different levels of complexity. The secondary research purpose was to develop a battery of eight psychometric tests to assess other abilities that are required for helicopter pilot training. Test prototypes were produced and administered to small samples of subjects. The tests were then revised into an experimental battery that required approximately 7 …

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An Error-Dependent Model Of Instrument-Scanning Behavior In Commercial Airline Pilots, Dennis H. Jones Apr 1983

An Error-Dependent Model Of Instrument-Scanning Behavior In Commercial Airline Pilots, Dennis H. Jones

Psychology Theses & Dissertations

Since the work of Fitts and his colleagues, researchers have been using eye-movement data to evaluate various aspects of pilot instrument scanning behavior. Although Senders' work indicated that link values and transitional probabilities could be accurately predicted using a random sampling process, several investigators have recently suggested that pilot scanning behavior was deterministic. However, there has been no clear empirical evidence to support a deterministic hypothesis. The present research presents a new flexible model of pilot instrument scanning behavior which assumes that the pilot uses a set of deterministic scanning patterns on (1) the pilot's perception of error in the …

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Improving The Accuracy Of Performance Evaluations: A Comparison Of Three Methods Of Performance Appraiser Training, Jerry Willard Hedge Jul 1982

Improving The Accuracy Of Performance Evaluations: A Comparison Of Three Methods Of Performance Appraiser Training, Jerry Willard Hedge

Psychology Theses & Dissertations

Researchers in the area of rater training have relied almost exclusively on rater error measures to assess training effectiveness. A reduction in rater tendency to commit these errors subsequent to training is viewed as evidence that these raters have become more accurate in rating their employees. This assumed relationship between rater errors and rating accuracy has recently been questioned. This uncertain relationship between psychometric errors and accuracy was the focus of the current research effort. Supervisory personnel were trained under one of three training programs (psychometric error training, observation training, or decision-making training). Halo, leniency, range restriction and accuracy measures …

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