Inventory of Dams in Maine, 1975

https://digitalmaine.com/usace_feddocs/1000/thumbnail.jp

The effect of target and non-target similarity on neural classification performance: a boost from confidence

Brain computer interaction (BCI) technologies have proven effective in utilizing single-trial classification algorithms to detect target images in rapid serial visualization presentation tasks. While many factors contribute to the accuracy of these algorithms, a critical aspect that is often overlooked concerns the feature similarity between target and non-target images. In most real-world environments there are likely to be many shared features between targets and non-targets resulting in similar neural activity between the two classes. It is unknown how current neural-based target classification algorithms perform when qualitatively similar target and non-target images are presented. This study address this question by comparing behavioral and neural classification performance across two conditions: first, when targets were the only infrequent stimulus presented amongst frequent background distracters; and second when targets were presented together with infrequent non-targets containing similar visual features to the targets. The resulting findings show that behavior is slower and less accurate when targets are presented together with similar non-targets; moreover, single-trial classification yielded high levels of misclassification when infrequent non-targets are included. Furthermore, we present an approach to mitigate the image misclassification. We use confidence measures to assess the quality of single-trial classification, and demonstrate that a system in which low confidence trials are reclassified through a secondary process can result in improved performance

Some psychological factors associated with illness behavior and selected illnesses

In the expanding field of medical sociology, the frequency of visits to a free medical facility has become an important form of illness behavior. Such behavior not only reflects the individual's physical health, but also his perception of it, and his decision what to do about it. Involved here are also his attitudes toward doctors and medical care, his psychological make-up, and his phenomenological well-being. Various studies have been able to relate the frequency of dispensary visits to such variables as occupational status, self-esteem and self-acceptance, perceived stress, and the readiness to assume the sick role.The present study was concerned with relating the frequency of dispensary visits to the following variables: disturbances of mood (reported well-being) and self-report measures of aggressive tendencies and of control over impulsiveness and over feelings of anger. The same variables were also related to three diagnostic categories: rheumatoid arthritis, hypertension, and ulcer. The major findings, obtained on an industrial population of over 300 male workers, are summarized below: 1. 1. Subjects who obtained high scores on the Mood Scales labeled Aggressive, Jittery, and Depressed had a greater frequency of illness behavior (dispensary visits for illness and illness absences).2. 2. Subjects who scored high on a self-report scale reflecting a tendency to engage in overt aggressive behavior, had a greater frequency of illness behavior.3. 3. The above test and questionnaire data were unrelated to control variables, not indicative of illness behavior: hernia, dispensary visits for injuries, and absences for personal leaves.4. 4. When the measures of control over impulsiveness and over feelings of anger were considered jointly with the other scales, then it was apparent that the amount of control affects the association of illness behavior with mood and overt aggressiveness: strong control reduces the association and weak control enhances it.5. 5. If the scales reflecting tendency to engage in overt aggressive behavior and to control impulsiveness and angry feelings are used to construct a two-dimensional space, then the following placements of the different diagnostic categories are possible: 5.1. (a) Hypertensive men tend to be low on overt aggressiveness and high on control.5.2. (b) Rheumatoid arthritics tend to be high on overt aggressiveness and high on control.5.3. (c) Men with ulcers tend to be low on overt aggressiveness and low on control.5.4. (d) Subjects with a high frequency of illness behavior tend to be high on overt aggressiveness and low on control.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/32133/1/0000186.pd