Robot-resident neural networks: A step beyond computer simulation

A simple, commercially available robot platform is presented in this paper with suggested modifications for adding a neural network controller and a better sensory system. The robot, called HexWalker, is a six-legged, servo-driven, battery-powered platform. We found this platform easy to modify with both hardware and software changes. The software changes can be programmed from a standard PC and downloaded into the EEROMS of the robot. This robot provides a tangible model of sensory/motor integration which is useful in both teaching and research.     

Dyslexia: saccadic eye movements

This paper describes an extensive study of the parameters of saccadic eye movement in a group of 28 poor-reading children and a comparative normally reading group of 31 children. Ages ranged from 6.0 to 16.9 yr. Poor readers had normal intelligence but were lagging by at least two years in reading ability as compared to their peer age group. Parameters studied in refixation eye movements included saccadic latency, accuracy, velocity, and acceleration, as well as differences in latency for abduct and adduct movements. Shapes of saccades were also studied. It was shown that eye-movement performance in simple saccadic refixation was not distinguishably different for poor readers and normal readers, even though in reading, which requires higher processing, eye-movement characteristics are quite different. Maturational changes for various saccadic eye-movement parameters were also examined for the normal and poor reading groups.     

The changing relationship between psychology and contemporary spiritual direction

As recently as the late 1970's, the relationship between spiritual direction and psychology was tentative and cautious. During the last decade, however, psychological methods and perspectives have been increasingly utilized in spiritual direction. This article examines how clinical psychology, developmental psychology, the psychology of women, and professional psychology are becoming increasingly relevant to the contemporary practice of spiritual direction in the United States, and how, in the process, the relationship between psychology and spiritual direction is changing.     

Stress and Control-Related Problems at Three Mile Island1

The relationship between stress and control for residents at Three Mile Island (TMI) was examined. TMI was studied because of the technological nature of the accident there. Residents of Frederick, Maryland, more than 80 miles from TMI, were used as a comparison group. Control-related problems were measured using questionnaires and a behavioral task. Stress levels were determined using self-report, behavioral, and biochemical measures. Residents at TMI reported more loss of control and performed more poorly on the behavioral task than did comparison subjects. Subjects at TMI reporting more loss of control had more stress-associated symptoms than did comparison subjects and subjects at TMI not experiencing as many control-related problems.     

Infant feeding and maternal attitudes among mothers of low-income

Demographic variables, maternal attitudes, knowledge, practices, and support systems were examined in a sample of 50 women attending a public health clinic for well baby visits. Black women were nonsystematically selected an approached as they were waiting for their babies. Because the number of white women attending the clinic was small, an effort was made to include all of them. Data were obtained through individual interviews conducted by a trained interviewer. A questionnaire was constructed to obtain demographic information, information regarding prenatal awareness, delivery, mother infant interaction in the hospital, nutrition and infant care during the 1st year of life, and attitudes. 68% of the women were black and 32% were married. Most unmarried mothers lived with parents (50%), other relatives (26.5%), or ex husbands/boyfriends (5.9%). The mean educational level of 11.8 years was higher than anticipated for studies of public health department clinic populations. Teenagers made up 38% of the sample. 74% of the women reported family incomes below $8000. 64% had more than 1 child. Only 2 mothers in the sample had attended childbirth classes. 2/3 of the mothers recalled receiving no prior information about labor and delivery procedures and medications. Practices during the 1st few days after delivery indicate that only 20% of the mothers held their babires in the 1st hour after delivery and none of the mothers had the baby rooming in with them. 54% of the babies spent some time in the high risk nursery. This limited the mothers' opportunities to interact with and feed them. Only 3 of the mothers breastfed their babies for any length of time. 2 of them decided to breastfed because that was the best nutrition for the baby, and 1 did so because her mother had breastfed. The most common reasons given for bottlefeeding were not wanting to nurse (43.5%) and inconvenience (26.1%). Only 13% mentioned the necessity of back to school/work as a reason for not breastfeeding. No differences were observed between teenage mothers and older mothers in regard to the reasons for not breastfeeding. Since the number of breastfeeding mothers in this study was too small to permit statistical analysis, only scores for bottlefeeding mothers were compared. Bottlefeeding mothers of the low income group had statistically significant higher mean scores on 3 attitudinal scales: seclusion of the mother, acceleration of development, and mother's covert attitudes toward breastfeeding. Lower scores alone or with their spouses suggest that, when the childrearing responsibility was shared with extended family, mothers tended to be stricter with their children and minimized physical and emotional dependence of the children on them. Mothers who lived with spouses or alone tended to be more nurturing and less strict with their children.     

The importance of home practice for progressive relaxation training

The efficacy of home practice assignments was evaluated as a component of standardized progressive relaxation training. Subjects reporting general anxiety and tension problems were assigned to either a home practice relaxation, no home practice relaxation or wait-list control condition. Treatment was conducted for 10 sessions over a 5-week period. In addition, subjects in both conditions engaged in in-vivo application of their relaxation skills during a final 2-week application period. Group comparisons showed that both progressive relaxation conditions significantly improved on daily self-monitored general anxiety and tension levels relative to the wait-list control condition. Group analyses of percent subject improvements supported the effectiveness of home practice assignments, especially during the application period. No systematic differences between groups, on physiological and self-report variables, were found during several laboratory relaxation evaluation sessions. This study supports the contribution of home practice assignments to progressive relaxation training.     

Male and female psychoneuroendocrine response to examination stress: A case report

Urinary catecholamine levels were investigated in one female and one male Ph.D. candidate during public defense of their Ph.D. theses as well as during 2 weeks preceding and 1 week following these examinations. Although females, in comparison to males, usually tend to show a weak adrenaline response to mental stress, a threefold increase was observed in both subjects. The results support the assumption that sex differences in adrenal-medullary responsiveness to stress is not determined by sex-specific biological factors alone and that a “male” responsiveness may be observed in achievement-oriented females exposed to a challenging real-life situation. Effects on urinary measures of cortisol obtained from the male subject resembled effects on adrenaline, showing that this kind of real-life stressor affects the sympathetic-adrenal medullary and the pituitary-adrenocortical systems similarly.