A Qualitative Exploration of Rural African American Youth Perceptions about the Effect of Dating Violence on Sexual Health

Adolescent dating violence (ADV) remains a significant concern, particularly among rural African Americans. Few studies have explored adolescents’ perceptions about the link between ADV and sexual health and none have targeted this population. Employing qualitative methods based in Community-Based Participatory Research and theory, this study explored rural African American adolescents’ knowledge, perceptions and beliefs about the impact of ADV on sexual health. Secondary data analysis of 20 semi-structured individual interviews, conducted with older adolescents (aged 18–21), revealed participants understood the link between ADV and sexual health consequences, specifically as it related to STI and HIV prevention, condom use, and refusal of sex; and the negative impact refusing sex, communicating about HIV and other STI prevention, and negotiating condom use can have on ADV. This included: (a) negative relationship outcomes, including ADV and fear; and (b) factors that impact one’s ability to refuse sex, communicate about HIV and STI prevention, and negotiate condom use. Findings underscore the need for comprehensive ADV prevention programs for rural African Americans.     

Varieties of Binocular Interaction in Human Vision

Binocular processing was investigated using a quantitative, process-oriented metatheory of response times. The analyses are not confined to particular distributional assumptions or specific models. Upper and lower performance boundaries for probability summation in parallel processing are defined and compared with observed distributions of reaction times using a variety of dichoptic stimuli. Performance that exceeds the upper bound strongly suggests faciliatory convergence between the two eyes (binocular channel summation). Performance below the lower bound suggests that inputs to the two eyes are processed serially. The results indicate that binocular channel summation in subjects with normal stereo vision requires targets of the same luminance polarity (paired increments or decrements) in corresponding retinal locations. When corresponding retinal locations are stimulated with opposing luminance polarities (increment to one eye, decrement to the other), performance is consistent with probability summation, indicating that parallel ON and OFF pathways remain segregated at least to the level of binocular fusion. Further analyses of data from a stereo-blind observer suggests serial processing of binocular inputs.     

Using multiple-exemplar training to teach a generalized repertoire of sharing to children with autism

The current study examined the utility of multiple-exemplar training to teach children with autism to share. Stimuli from 3 of 4 categories were trained using a treatment package of video modeling, prompting, and reinforcement. Offers to share increased for all 3 children following the introduction of treatment, with evidence of skill maintenance. In addition, within-stimulus-category generalization of sharing was evident for all participants, although only 1 participant demonstrated across-category generalization of sharing. Offers to share occurred in a novel setting, with familiar and novel stimuli, and in the presence of novel adults and peers for all participants during posttreatment probes.     

Information-processing architectures in multidimensional classification: a validation test of the systems factorial technology

A growing methodology, known as the systems factorial technology (SFT), is being developed to diagnose the types of information-processing architectures (serial, parallel, or coactive) and stopping rules (exhaustive or self-terminating) that operate in tasks of multidimensional perception. Whereas most previous applications of SFT have been in domains of simple detection and visual-memory search, this research extends the applications to foundational issues in multidimensional classification. Experiments are conducted in which subjects are required to classify objects into a conjunctive-rule category structure. In one case the stimuli vary along highly separable dimensions, whereas in another case they vary along integral dimensions. For the separable-dimension stimuli, the SFT methodology revealed a serial or parallel architecture with an exhaustive stopping rule. By contrast, for the integral-dimension stimuli, the SFT methodology provided clear evidence of coactivation. The research provides a validation of the SFT in the domain of classification and adds to the list of converging operations for distinguishing between separable-dimension and integral-dimension interactions.     

Developmental changes in the responses of preterm infants to a painful stressor

The purpose of this investigation was to examine longitudinally gestational age and developmental differences in preterm infants' self-regulatory abilities in response to a painful stressor, as well as associations between behavioral and cardiovascular responses. Participants included 49 healthy premature infants. Behavioral and cardiovascular responses to a heel stick blood draw were compared between infants of 28-31 and 32-34 weeks' gestation age at birth. Both gestational age groups displayed behavioral and cardiovascular indications of stress in response to the blood draw. However, both shortly after birth and several weeks later, infants born at younger gestational ages (28-31 weeks) were more physiologically reactive. Evidence that the behavioral stress responses of 28-31 weeks' gestation age group preterm infants do not reflect their physiological responses suggests that evaluation of preterm infants' experiences and risk require assessments of both physiology and behavior. The greater stress vulnerability of the 28-31 weeks' gestation group relative to the 32-34 weeks' gestation group and the implications of this for subsequent development are discussed.     

Quantum dynamics of human decision-making

A quantum dynamic model of decision-making is presented, and it is compared with a previously established Markov model. Both the quantum and the Markov models are formulated as random walk decision processes, but the probabilistic principles differ between the two approaches. Quantum dynamics describe the evolution of complex valued probability amplitudes over time, whereas Markov models describe the evolution of real valued probabilities over time. Quantum dynamics generate interference effects, which are not possible with Markov models. An interference effect occurs when the probability of the union of two possible paths is smaller than each individual path alone. The choice probabilities and distribution of choice response time for the quantum model are derived, and the predictions are contrasted with the Markov model.     

Developmental changes of parental-reported sleep disturbance symptoms in children with attention deficit disorder

The primary goal of this retrospective study was to assess parental report of current sleep disorders in school-aged attention deficit disorder (ADD) children, as well as recalled sleep problems from when the children were infants (0–12 months) and toddlers (1–3 years). Results of a sleep questionnaire completed by mothers of 48 ADD children and a comparison group of 30 patients with school problems indicate that ADD children were perceived to have significantly more sleep problems and that these problems had onset in infancy. Specific items in the questionnaire which were increased included latency to sleep onset of more than 30 min at least 3 nights per week, fatigue upon awakening, and recall of nightmares. Pediatric clinicians should be alert to possible sleep disorders in children suspected of attention disorders and should consider sleep hygiene measures as a component of treatment.