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51.
Numerical competence has been studied in animals under a variety of conditions, but only a few experiments have reported animals’
ability to detect absolute number. Capaldi and Miller (1988) tested rats’ ability to detect absolute number by using biologically
important events—the number of reinforced runs followed by a nonreinforced run—and found that the rats ran significantly slower
on the nonreinforced run. In the present experiments, we used a similar procedure. Pigeons were given a sequence of trials
in which responding on the first three trials ended in reinforcement but responding on the fourth trial did not (RRRN). When
the response requirement on each trial was a single peck (Experiment 1), we found no significant increase in latency to peck
on the fourth trial. When the response requirement was increased to 10 pecks (Experiment 2), however, the time to complete
the peck requirement was significantly longer on the nonreinforced trial than on the reinforced trials. Tests for control
by time, number of responses, and amount of food consumed indicated that the pigeons were using primarily the number of reinforcements
obtained in each sequence as a cue for nonreinforcement. This procedure represents a sensitive and efficient method for studying
numerical competence in animals. 相似文献
52.
Nurses have the potential to be one of the largest groups of users a medical library can serve. In recognition of this fact, librarians at St. John's Health System embarked on a journey to collaborate with nurses and increase this group's use of the medical library. In 2004, a nursing outreach plan was developed by librarians, with input from non-physician health care employees. The nursing outreach plan will be reviewed along with the barriers and successes encountered during implementation of the plan. Innovative strategies for reaching nursing personnel were accomplished by partnering with nurses to reach nurses. 相似文献
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Kenneth W. Merrell Steven J. Gill Holly McFarland Todd McFarland 《Psychology in the schools》1996,33(3):185-191
As part of the validation research process for a new self-report social-emotional test for children, internalizing social-emotional symptoms (e.g., depression, anxiety, social withdrawal, somatic complaints, positive and negative affectivity) of a group of elementary-age gifted students (n = 65) were contrasted with those of a carefully matched (by gender and age) comparison group of non-gifted students (n = 65). Subjects completed the Internalizing Symptoms Scale for Children (ISSC) (Merrell & Walters, 1996), a self-report measure of internalizing symptoms, affect, and cognition. The gifted students reported significantly fewer internalizing symptoms than did the comparison group. An analysis of critical items separating the two groups indicated that the gifted students differed most substantially from their non-gifted peers on ISSC items that relate to self-efficacy and perceived self-importance. Although these types of self-perceptions are considered to be a peripheral rather than a central component of specific internalizing disorders, it is hypothesized that their positive presence in children may act as a “buffering” factor, possibly insulating children from insults to their social-emotional functioning that may lead to the development of internalizing forms of psychopathology. The results of this investigation are discussed in terms of their relationship to conflicting previous research in this area, to future research needs in the study of social-emotional symptoms and development of gifted children, and in terms of the construct validity evidence for the ISSC. © 1996 John Wiley & Sons, Inc. 相似文献
56.
After Officer Darren Wilson fatally shot African American teen Michael Brown in August 2014, rioters unleashed their anger on the streets of Ferguson, Missouri. Using content analysis and framing theory, this study analyzed how news organizations covered events in Ferguson on Twitter over the course of a month immediately following the shooting. Protesters were framed as troublemakers; but community leaders were not framed as “rabble-rousers.” Journalists continued to rely on official sources more than alternate sources in spite of criticism of law enforcement and other political elites, but nearly 10% of the coded tweets that relied on official sources included some element of skepticism. Tweets from cable news outlets did not show partisan bias in any significant amount; and traditional legacy news media sources utilized the Twitter platform enhancements—such as article links, photos, links to other content, or hashtags—more than their new digital media counterparts. As Twitter launched #ferguson into the national consciousness, it is quite plausible that the framing of the tweets by news agencies may have molded perceptions of larger issues about the racial health of the nation, established policies of law enforcement, and the challenge of elected leaders to resolve explosive domestic problems. 相似文献
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Zazove P Meador HE Derry HA Gorenflo DW Burdick SW Saunders EW 《American annals of the deaf》2004,148(5):376-384
Deaf person's computer use was studied (N = 227). Respondents self-administered a survey in their preferred language (voice, American Sign Language, captions, or printed English). A small nonparticipant sample was also recruited. Demographics were consistent with those in other studies of deaf people: 63% of respondents reported computer use, mostly at home; 50% of nonparticipants reported computer use. Subjects with hearing loss due to meningitis were less likely to use computers (p = .0004). Computer use was associated with English usage at home (p = .008), with hearing persons (p = .002), and with physicians and nurses (p = .00001). It was also associated with the use of Signed English as a child to communicate (p = .02), teacher use of Signed English (p = .04), and teacher use of ASL (p = .03). Two thirds of respondents reported using computers, though nonresponder data suggested less use among all deaf persons. Computer use was associated with English use and inversely associated with hearing loss due to meningitis. 相似文献
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