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Behavioral comparisons of liked and disliked hyperactive children in play contexts and the behavioral accommodations by their classmates.

This study examined the behavioral differences among liked and disliked hyperactive children and their normal peers during joint activities. 25 hyperactive children and 39 normal control subjects were selected and observed in high- and low-structured play settings (counterbalanced for order) in one of 3 dyadic groupings (10 liked hyperactive children, each with a control; 15 disliked hyperactive children, each with a control; and 7 control-control pairs). For the most part, the differences observed did not depend on setting or gender comparisons. Hyperactive children were more active, talkative, and physically off-task than their peers, but they made fewer positive social statements. Disliked hyperactive children made more negative statements with accompanying negative physical interactions. Specifically, in response to disliked hyperactive children, normal partners became more negative and active, were less talkative and cooperative, and engaged in more solitary play than when playing with other normal children.

Attention Deficit Disorder with Hyperactivity↗

Behavioral vigilance following infusions of 192 IgG-saporin into the basal forebrain: selectivity of the behavioral impairment and relation to cortical AChE-positive fiber density.

Rats were trained in a previously validated behavioral vigilance task that required them to detect visual signals of variable length and to discriminate signal from nonsignal events. Baseline performance was characterized by a signal length-dependent ability to score hits, a decline in hits over time, and a correct rejection rate of approximately 70%. After the rats reached criterion performance in this task, the immunotoxin 192 IgG-saporin or its vehicle was infused into the area of the nucleus basalis/substantia innominata of the basal forebrain. Postoperative performance in lesioned rats was characterized by a decrease in their ability to detect signals while their ability to correctly reject nonsignals remained unaffected. The effect of the lesion did not recover in the course of over 180 sessions of postlesion testing. The overall performance of the rats correlated with acetylcholinesterase (AChE)-positive fiber density in all cortical areas measured except the cingulate and pyriform cortex. These findings help to elucidate the nature of the attentional impairments resulting from the loss of cortical cholinergic inputs.

Acetylcholinesterase↗

Use of personal protective equipment and operating room behaviors in four surgical subspecialties: personal protective equipment and behaviors in surgery.

OBJECTIVE: To evaluate Universal Precautions (UP) compliance in the operating room (OR). DESIGN: Prospective observational cohort. Trained observers recorded information about (1) personal protective equipment used by OR staff; (2) eyewear, glove, or gown breaks; (3) the nature of sharps transfers; (4) risk-taking behaviors of the OR staff; and (5) needlestick injuries and other blood and body-fluid exposures. SETTING: Barnes-Jewish Hospital, a 1,000-bed, tertiary-care hospital affiliated with Washington University School of Medicine, St Louis, Missouri. PARTICIPANTS: OR personnel in four surgical specialties (gynecologic, orthopedic, cardiothoracic, and general). Procedures eligible for the study were selected randomly. Hand surgery and procedures requiring no or a very small incision (eg, arthroscopy, laparoscopy) were excluded. RESULTS: A total of 597 healthcare workers' procedures were observed in 76 surgical cases (200 hours). Of the 597 healthcare workers, 32% wore regular glasses, and 24% used no eye protection. Scrub nurses and medical students were more likely than other healthcare workers to wear goggles. Only 28% of healthcare workers double gloved, with orthopedic surgery personnel being the most compliant. Sharps passages were not announced in 91% of the surgical procedures. In 65 cases (86%), sharps were adjusted manually. Three percutaneous and 14 cutaneous exposures occurred, for a total exposure rate of 22%. CONCLUSION: OR personnel had poor compliance with UP. Although there was significant variation in use of personal protective equipment between groups, the total exposure rate was high (22%), indicating the need for further training and reinforcement of UP to reduce occupational exposures.

Adolescent↗

Liquid chromatographic retention behavior and separation of chlorophenols on a beta-cyclodextrin bonded-phase column, Part I. Monoaromatic chlorophenols: retention behavior.

The liquid chromatographic retention behavior of nineteen monoaromatic chlorophenols on a beta-cyclodextrin bonded-phase column is investigated with respect to mobile phase composition, pH, temperature, and ionic strength. The mechanistic aspects of retention of these compounds on the beta-cyclodextrin column are studied and compared to other reversed-phase columns. Most of the evidence suggests that the unique selectivity of this column is due to inclusion complex formation, which provides the physical basis for the resolution of positional isomers. Under certain chromatographic conditions, however, the more highly chlorinated congeners appear to be excluded from the cyclodextrin cavity; in such cases a normal-phase chromatographic mechanism is postulated, based on the interaction of the substrates with the secondary hydroxyls on the periphery of the cyclodextrin moieties.

Chlorophenols↗

Radon awareness and testing behavior: findings from the Behavioral Risk Factor Surveillance System, 1989-1992.

Radon is considered an important environmental risk factor for lung cancer. Previous studies have shown that relatively few homes have been tested for radon. Results from the Behavioral Risk Factor Surveillance System from 1989--1992 show significant interstate and demographic variation in levels of radon awareness and home testing. There was evidence that levels of radon awareness and testing homes for radon have increased from 1989 through 1992. Although these trends in the data are encouraging, the data also suggest that continued education and other interventions may be necessary to reach the Public Health Service's testing and mitigating objectives for residential radon.

Adolescent↗

Temporal stability and overlap of behavioral and questionnaire assessments of type A behavior in coronary patients.

To examine the temporal stability of the Type A behavior pattern (TABP) after a cardiac event, both a Videotaped Clinical Interview (VCI) (formerly known as the Videotaped Structured Interview) and the Jenkins Activity Survey (JAS) were administered to 81 male and 19 female patients three times during the first year after hospitalization for an initial myocardial infarction, coronary artery bypass graft, or both. There was no intervention other than the usual treatment provided by the medical care system. The test-retest reliability coefficients were moderately high for all measures of TABP. The JAS provided the most reliable scores in both sexes. The Hard Driving and Competitive component of the JAS decreased significantly throughout the year in both men (p less than 0.001) and women (p less than 0.01), but in men all three overall indices of TABP and their components (other than Hard Driving and Competitive) decreased spontaneously between 1 and 3 months, and then increased again by 1 year to nearly the original levels. In women, there were no consistent changes over time among the indices other than that for the Hard Driving and Competitive component of the JAS. Intercorrelations among the indices demonstrate the failure of the JAS to assess the Hostility component of the TABP and the possibility that the Speed and Impatience subscale of the JAS measures different things in men and women. The newest method of scoring the VCI appeared to provide the best index for measuring TABP in male coronary patients, while the original scoring was more reliable for women.

Adult↗

Universal finite-size scaling behavior and universal dynamical scaling behavior of absorbing phase transitions with a conserved field.

We analyze numerically three different models exhibiting an absorbing phase transition. We focus on the finite-size scaling as well as the dynamical scaling behavior. An accurate determination of several critical exponents allows one to validate certain hyperscaling relations. Using these hyperscaling relations it is possible to express the avalanche exponents of a self-organized critical system in terms of the ordinary exponents of a continuous absorbing phase transition.

Journal Article↗

The relationship of behavioral cues to assaultive behavior.

The purpose of this 2-year, case control study was to determine whether differentiation between assaultive and nonassaultive patients can be made based on behavioral assessments and/or sociodemographic variables. For each assault incident, the chart of the patient who assaulted and a randomly chosen patient who did not assault on that day were reviewed (N = 72 subjects or 26 pairs). Various scales were used to evaluate the subjects retrospectively (the day prior to the assault), and patients who assaulted staff were interviewed when possible. An analysis found no differences between patients who assaulted and controls on sociodemographic variables. Those who assaulted had significantly more prior assaults (p = .04) and more difficulty verbalizing angry feelings appropriately on their units (p < .01). Prior to the assault, assaultive patients were more verbally hostile (p = .037) and showed more increased motor activity (p = .001) than controls.

Cues↗

The wind-evoked escape behavior of the cricket Gryllus bimaculatus: integration of behavioral elements

The wind-evoked escape behavior of freely ranging crickets (Gryllus bimaculatus) was studied using high-speed video and film analysis. The escape response can be of three types: a turn, a jump or a turn + jump. Any of these can be followed by running. The turn is similar to that of the cockroach, in terms of the details of body and leg movements. A jump occurs only when the cricket has its back to the wind, either because the stimulus came approximately from behind or because the cricket had first turned away from the wind and then jumped. The jump, like that of locust, requires some form of energy storage and quick release to obtain the necessary power. Locusts use long-term co-activation of antagonistic leg motor neurons to produce mechanical energy storage. By contrast, crickets do not appear to co-activate antagonistic leg motor neurons. Possible alternative energy storage and release mechanisms are discussed.

Journal Article↗

Postnatal behavioral development in methylazoxymethanol-induced microcephalic rats--a behavioral teratology study.

Behavioral testings in methylazoxymethanol (MAM)-induced microcephalic rats were conducted. Pregnant Sprague-Dawley rats were treated intraperitoneally with 0, 20 or 40 mg/kg of MAM once a day on day 14 of gestation and were allowed to delivery. Male pups from each litter were examined for open field test at 6 weeks of age and shuttle-box avoidance test at 7 weeks or more of age. In the open field activity of pups, the counts of ambulation and locomoting distance in 40 mg/kg group have increased significantly as compared with those in control group. In the shuttle-box avoidance test, the avoidance response rate was dose-dependently high in the session of the 1st day. As to the interaction between the avoidance response rate and sequence of sessions, however, the avoidance response rate in 40 mg/kg group was significantly low. Rate of the rats with errors and number of response during the intertrial interval was significantly high in 40 mg/kg group. Thus, we could demonstrate functional disturbance in the memory retaining ability in utero MAM-exposed rats.

Abnormalities, Drug-Induced↗

Behavioral engineering: the reduction of smoking behavior by a conditioning apparatus and procedure.

Recent findings from animal conditioning studies have revealed methods of reducing responses to a very low level with a minimum of aversive by-products. These findings were incorporated into the design of a cigarette case that automatically locked itself for a period of time after a cigarette was removed from it. The next cigarette could be taken at the end of the interval, which was signalled by distinctive stimuli. Five heavy smokers were allowed to become accustomed to using the case. Then, the duration for which the case was locked was gradually increased over a period of weeks to about 1 hr. Smoking gradually decreased to the target level of about one-half of a package of cigarettes per day. Control procedures showed that specific features of the apparatus were responsible for the reduction of smoking. The results indicated that this apparatus was sufficiently effective, convenient, and acceptable to smokers to constitute a practical procedure for reducing smoking to the level considered medically safe. The procedure may also have potential for reducing other habit-forming or addictive behaviors.

Journal Article↗

Correspondence training, prior verbal training, and control of nonverbal behavior via control of verbal behavior.

The role of prior verbal training in correspondence training and later verbal control of nonverbal behavior was examined in two groups of Head Start children. One group received correspondence training without prior verbal training, the other with. Essentially no differences were found between the two sequences; thus it seems appropriate to consider the content phases (reinforcement contingent on target verbalization alone) of previous research as control procedures and not a necessary precursor to correspondence training.

Journal Article↗

Precurrent contingencies: Behavior reinforced by altering reinforcement probability for other behavior.

The present study explored the effects of a precurrent contingency in which one (precurrent) activity increased the reinforcement probability for another (current) activity. Four human subjects responded on a two-key computer mouse. Each right-key press was reinforced (points exchangeable for money) with .02 probability. In one condition (no precurrent contingency), pressing the left key had no scheduled consequence; in another condition (precurrent contingency), pressing the left key increased the reinforcement probability for right-key responding to .08 for 15 s. Initial exposure to the precurrent contingency resulted in acquisition of precurrent left-key responding for 3 subjects, but for the 4th subject a special contingency was required. Right-key responding occurred at a high stable rate across the conditions. Changeovers to left-key responding dropped to near zero when the precurrent contingency was absent and were maintained at enhanced levels when the precurrent contingency was present. Contacts with the left key consisted of short response runs. Right-key responses were more frequently emitted within 15 s of a left-key response when the precurrent contingency was present, an efficient adaptation to the contingency. Continued research on precurrent behavior may produce insights into complex phenomena such as autoclitics and self-control.

Journal Article↗

Extramarital sex and HIV risk behavior among US adults: results from the National AIDS Behavioral Survey.

Data from the National AIDS Behavioral Survey were used to examine the social distribution of extramarital sex and risk for human immunodeficiency virus (HIV) infection among married individuals in the United States. Of 1686 married respondents living across the United States, 2.2% reported extramarital sex; of 3827 married respondents living in 23 urban areas with large Hispanic or African-American populations, 2.5% reported having sexual partners outside marriage. The data indicate that the correlates of extramarital sex varied by race/ethnicity. Low levels of condom use were found among people reporting extramarital sex (8% to 19% consistent users).

Adolescent↗

Lags in behavioral change: A population based comparison of cardiovascular risk behavior in Poland and Sweden.

One thousand and twenty Polish men and women and 1,011 Swedish men and women aged 50 and recruited through primary health care took part in a survey relating to their knowledge of health-related behaviour, attitudes to health-related behaviour and self-reported risk behaviour. The results reveal that Poles know as much about cardiovascular risk factors as Swedes, but that Swedes feel that it is more important to change their dietary habits and to influence factors in the working environment to avoid the risk of developing CVD than did Poles. Swedes also displayed less risk behaviour than Poles and more Swedes than Poles had successfully stopped smoking. These findings suggest that differences in stages of health-related behavior that have previously been observed at an individual level may sometimes also be discerned at a national level.

Cardiovascular Diseases↗

Effects of undernutrition during suckling on footshock escape behavior and of post-training beta-endorphin administration on inhibitory avoidance task test behavior of young rats.

The hypothalamic beta-endorphin system of young Wistar rats of both sexes (21-day-old) responds in a distinct way to behavioral situations when compared to adult rats (90 to 120-day-old). In the present study we investigated whether the post-training amnestic effect of beta-endorphin previously demonstrated in Wistar adult rats is also observed in young (21-day-old) well-nourished and undernourished rats. Rats were undernourished since birth by feeding their dams an 8% casein diet, while well-nourished offspring were fed by dams maintained on a 20% casein diet. beta-endorphin was administered after training in a step-down inhibitory avoidance task using a 0.2- or 0.8-mA footshock. Retention was tested 24 h later. We observed that the dose of beta-endorphin (1 microgram/kg, ip) previously reported to have an amnestic effect on adult rats was ineffective in weanling rats of both nutritional groups. At a higher dose (2 micrograms/kg, ip) and using a 0.2-mA shock, beta-endorphin impaired the retention only of well-nourished rats. Test-to-training difference (in s) in step-down latency for well-nourished beta-endorphin-treated rats was 7 vs 25 s for well-nourished rats treated with saline (P < 0.05). Undernourished rats were hyperreactive to this shock intensity. Footshock escape latency (in s) for undernourished rats was 3.56 vs 5.80 for well-nourished rats (P < 0.05, experiment 1) and 5.01 vs 10.89 (P < 0.05, in experiment 2) and showed better retention than did well-nourished rats.(ABSTRACT TRUNCATED AT 250 WORDS)

Age Factors↗

Wisconsin Behavior Rating Scale: measure of adaptive behavior for the developmental levels of 0 to 3 years.

The development of the Wisconsin Behavior Rating Scale was examined. We hypothesized that the extensive content of the scale as well as its arrangement of items with progressive difficulty would be effective in discriminating a rather homogeneous group of individuals functioning between 0 and 4.0 years. The scale was standardized on a sample of 325 institutionalized mentally retarded persons and a sample of 184 nonretarded infants and young children. Highly acceptable levels of reliability and validity were established for both samples. With respect to factorial validity, cognitive and psychomotor abilities accounted for approximately 83% of the explained variance. The hypothesis was supported in terms of adequate results of high concurrent and construct validity of the scale.

Activities of Daily Living↗

[Thermal behavior of phosphate-bonded investment. Part 1. Thermal behavior of MgNH4PO4.6H2O (author's transl)].

Thermal behavior of MgNH4PO4.6H2O was investigated by means of TG-DTA and X-ray diffraction. Two endothermic peaks (90 degrees C and 230 degrees C) and a exothermic peak (660 degrees C) were observed in a micro-DTA curve. Weight loss occurred at two stages corresponding to the two endothermic peaks. Values of weight loss were about 38% and 53%, respectively, at the end of each stage. These values were nearly equal to theoretical weight losses in the formation of Mg2P2O7 from MgNH4PO4.6H2O via MgNH4PO4.H2O. The intermediate, MgNH4PO4.H2O was identified by X-ray diffraction. The second weight loss continued till about 600 degrees C. The product during the second stage was amorphous and Mg2P2O7 began to crystallize above about 600 degrees C. The exothermic peak was thought to correspond to the crystallization. On the other hand, the first endothermic peak separated into two peaks in a macro-DTA curve. The first corresponded to removal of crystal water from MgNH4PO4.6H2O and the second to evaporation of the condensed water. Moreover the exothermic peak also separated into two peaks and the peak temperatures lowered. It was considered that the crystallization was affected by the atmosphere.

Dental Casting Investment↗