Internet use in the contemporary media environment

Although a significant amount of research has focused on traditional media choice and use, and even on some ‘new’ media, these studies have either neglected the Internet and World Wide Web or were conducted prior to their recent popularity. This study offers a novel exploration of individuals' use of three Internet functions (information retrieval, information giving, and conversation capabilities) in the context of the use of other communication media. Data from 684 individuals demonstrate that the Internet is a multidimensional technology used in a manner similar to other, more traditional media. Specifically, conversation features of the Internet align with mediated interpersonal technologies (the telephone and electronic mail), whereas the Internet's information‐retrieval and information‐giving features are used in ways similar to mass media channels (newspapers, television, and books and magazines). In addition, needs fulfilled by these channels cluster in ways consistent with past research, regardless of the technologies employed to meet them.     

In Vivo Hippocampal Acetylcholine Release During Exposure to Acute Stress

Hippocampal extracellular acetylcholine (ACh) and choline levels were evaluated using in vivo microdialysis in male Fischer 344 rats before, during, and following an 80-min exposure to two different stress conditions. Measurements were taken in rats restrained and immersed in a water bath containing either 37 degreesC (normothermic-restraint) or 20 degreesC (cold-restraint) water. Results were compared to normothermic-freely-moving rats. Cold-restrained rats displayed decreased ACh levels during cold exposure relative to both normothermic-restrained and normothermic-freely-moving rats. By the end of the cold exposure period and following removal from cold, ACh levels had returned to near-baseline values. Normothermic-restrained rats had levels similar to those of normothermic-freely-moving rats, except for a marked increase in ACh following removal from restraint. Cold-restrained rats displayed a gradual elevation in choline levels during cold stress, followed by a gradual decline after stress termination, whereas both normothermic-restrained and normothermic-freely-moving rats displayed gradual decreases during the microdialysis session. These findings demonstrate that central cholinergic neurotransmission can be altered by the application of, and removal from, acute stressors. In addition, the results suggest a possible relationship between the magnitudes of both the stressor and its cholinergic consequences.     

Biofeedback training with a learning disabled child.

Biofeedback training was used to increase a learning disabled child's ability to control his breathing patterns. The procedure was most effective when the child was permitted to explore freely the correlations between his respiratory movements and feedback from the apparatus. Probe trials showed that increased external and self-directed control over the direction and volume of breathing was achieved. Results were discussed in terms of the relationship between biofeedback technology and learning and behavior problems.     

Clamped Corticosterone (B) Reveals the Effect of Endogenous B on Both Facilitated Responsivity to Acute Restraint and Metabolic Responses to Chronic Stress

To determine the effects of both corticosterone (B) and chronic stressors on acute ACTH responses to restraint, young male rats were exposed to streptozotocin-induced diabetes, cold (5-7 degreesC) or intracerebroventricular (icv) neuropeptide Y (NPY) for 5 d and then exposed to restraint within 2 h after lights on. Two groups of rats were studied: intact and adrenalectomized replaced with B pellets that maintained plasma B in the normal mean 24-h range of intact rats. In addition to ACTH and B responses to restraint on d 5, body weight, food intake, fat depots, glucose and other hormones were measured to determine the role of stress-induced elevations in B on energy balance. ACTH responses to restraint were normal in intact rats subjected to diabetes or cold. By contrast, there was no ACTH or B response to restraint in NPY-infused intact rats. All 3 groups of chronically stimulated adrenalectomized rats with clamped B had facilitated ACTH responses to restraint compared to their treatment controls. Overall food intake increased in all groups of stressed rats; however, augmented intake occurred only during the light in intact rats and equally in the light and dark in B-clamped rats. White adipose depot weights were decreased by both diabetes and cold and increased by NPY in intact rats; the decreases with cold and increases with NPY were both blunted and changes in fat stores were not significant in adrenalectomized, B-clamped rats. We conclude that: 1. diabetes- and cold-induced facilitation of restraint-induced afferent input to hypothalamic control of the hypothalamo-pituitary-adrenal (HPA) axis is opposed in intact rats by the elevated feedback signal of B secretion; 2. NPY does not induce facilitation of afferent stress pathways; 3. chronic stimulation of the HPA axis induces acute hyperresponsiveness of hypothalamic neurons to restraint provided that the afferent input of this acute stimulus is not prevented by B feedback; 4. stimulus-induced elevations in B secretion result in day-time feeding; 5. insensitivity of both caloric efficiency and white fat stores to chronic stress in adrenalectomized, B-clamped rats results from loss of normally variable B levels.     

The social behavior of preschool children at different developmental levels: Effects of group composition

The social participation, constructiveness of play, and communicative interactions of 4- to 6-year-old developmentally delayed and nondelayed preschool children were compared under conditions in which children interacted in play groups homogeneous with respect to developmental level and in heterogeneous play groups. A within-subjects design was utilized to assess the relatively immediate effects of group composition. Data for both children and teachers were analyzed separately for each of four developmental level groups and across two time periods. Although numerous differences were obtained as a function of developmental level and time, the only significant effect of group composition on children was reduced inappropriate play by severely delayed youngsters while interacting in heterogeneous play groups. No detrimental effects of heterogeneous grouping were observed for children at any developmental level. These results were discussed in terms of their importance in evaluating the impact of programs that mainstream young children.     

Intercultural Study of Personal Space: A Case Study

The study of intercultural differences in personal space attempts to identify factors that could be helpful in guiding people from different cultures to live and work together in international ventures. The objective of this research was to measure interpersonal distance in a cross-cultural environment. Twenty-three participants classified in 4 cultural groups answered an 11-questions interview where the personal distance and orientation between seated interactants were measured. Results showed that Anglo Saxons used the largest zone of personal space, followed by Asians, then Caucasians, and, as expected, Mediterraneans and Latinos used the shortest distance. Where Latinos adopt a face-to-face position, Caucasians tend to orient themselves to the side of the interviewer, which has an impact on interpersonal communication.     

Effects of social setting on the friendship formation of young children differing in developmental status

This study examined the effects of social setting on the friendship formation of preschool-aged children differing in developmental status. Normally developing children (ND), children with communication disorders (CD), and children with developmental (cognitive) delays (DD) participated in a series of short-term play groups. Each of the 21 play groups consisted of children similar in developmental status (ND, CD, or DD play groups; specialized social settings) or contained primarily ND children with a small number of either CD or DD children (mainstreamed social settings). All children initially were unacquainted with one another and were carefully matched on a variety of family demographic and child characteristic measures. Results revealed that high proportions of unilateral friendships were established for all developmental status groups, but proportions were smaller when employing an index of reciprocal friendships. The proportions of unilateral and reciprocal friendships varied in accordance with a child's developmental status, but were not affected by social setting. In mainstreamed settings, the friendship choices of ND children were affected by peers' developmental status. Moreover, children with reciprocal friends were more socially interactive overall than children without reciprocal friends. The implications of these results for arranging social settings that support friendship formation for children with and without disabilities are discussed.     

The Friendships of Young Children with Developmental Delays: A Longitudinal Analysis

This longitudinal study examined the social interactions of children with mild developmental (cognitive) delays with friends across the early childhood and early elementary years. Results revealed increases in many forms of social exchange with effect sizes in the moderate range, but no changes in sustained interactive play. Social interaction patterns, difficulties in identifying friends to participate in the study, and concerns evident in children's peer and friendship networks suggest the general absence of reciprocal friendships. These findings are consistent with the hypothesis that children's limited peer-related social competence constrains all aspects of their development of friendships. Despite these problems, the potential benefits of interventions designed to support relationships at this stage of friendship development for children with delays were noted.     

THE ACQUISITION OF PREPOSITIONAL MOTOR RESPONSES IN HANDICAPPED CHILDREN1

The acquisition of prepositional motor responses in three handicapped preschool children was analyzed for three pairs of prepositions. Generalization of prepositional knowledge at each stage of acquisition was assessed by a series of probe trials. In addition, an analysis of the control of prepositional responses when objects of the preposition (OP) and direct objects (DO) were relevant cues was conducted. The effect of this object-cue procedure, as well as a specially devised prompting technique on acquisition, was also determined. Results indicated substantial control by OPs whenever this cue was relevant, but this did not affect acquisition of prepositional concepts when these cues were eliminated. Analysis of the probe data and the prompting technique suggested various ways in which instructional programs for teaching prepositional knowledge to handicapped children could be constructed in a simple and efficient manner.     

Developmentally delayed children's influence attempts with mothers predict interactions with peers over time

We examined whether influence attempts of 4–6 year-old children with mild developmental delays occurring when interacting with their mothers predicted children's interactions with peers two years later. Hierarchical regressions controlling for relevant child characteristics and a measure of direct parental actions to influence their children's peer interactions revealed a consistent association between influence attempts with mothers and four important aspects of children's peer relationships: successful social bids to peers, initiations to peers, extent of involvement with peers, and overall level of peer interactions. Results were consistent with social communicative processes likely to emerge during children's influence attempts with mothers, which are relevant to peer relationships. The fact that influence attempts with mothers were associated with peer interactions over a time period when peers occupy a more dominant role in children's social relationships supports the role of indirect family influences as a potential intervention strategy to further the peer competence of children with delays.