Cronbach’s Alpha coefficient is the most popular method of examining reliability. It is typically used when the researcher has several Likert-type items that are summed or averaged to make a composite score. Distribu...Cronbach’s Alpha coefficient is the most popular method of examining reliability. It is typically used when the researcher has several Likert-type items that are summed or averaged to make a composite score. Distribution of alpha coefficient has been subjected of many studies. In this study relationship between randomness and Cronbach alpha coefficient were investigated and in this context, present study was examined the question“What is the distribution of the coefficient alpha when a Likert-type scale is answered randomly?” Data were generated in the form of five point Likert-type items and Monte Carlosimulation was run for 5000 times for different item numbers.展开更多
目的对迷你临床演练评估的信度进行Meta分析,评价迷你临床演练评估用于评估医学生临床能力的可靠性。方法计算机检索PubMed、Cochrane library、Embase、Web of science、Scopus、CNKI、WanFang Data、VIP和CBM等数据库,收集采用Mini-CE...目的对迷你临床演练评估的信度进行Meta分析,评价迷你临床演练评估用于评估医学生临床能力的可靠性。方法计算机检索PubMed、Cochrane library、Embase、Web of science、Scopus、CNKI、WanFang Data、VIP和CBM等数据库,收集采用Mini-CEX评价医学生临床能力并使用Cronbach'sα系数进行迷你临床演练评估信度测量的研究,检索时限为数据库建库至2018年11月。由2名研究员按照纳入和排除标准筛选文献、提取资料、评价质量,然后采用SPSS 21.0软件进行Meta分析。结果最终纳入17项研究,其中国外研究12项,国内研究5项。迷你临床演练评估的总Cronbach'sα系数为0.89295%CI(0.823,0.899),国外迷你临床演练评估的Cronbach'sα系数为0.90495%CI(0.821,0.910),国内迷你临床演练评估的Cronbach'sα系数为0.84895%CI(0.703,0.936)。结论当前国内外迷你临床演练评估的信度均较高,迷你临床演练评估用于评估国内外医学生临床能力具有较好的可靠性。展开更多
The HIV/AIDS epidemic has grown on an unprecedented scale since it was first recognized, and presently it is considered as a well known global public health crisis. In making the health policy where millions of popula...The HIV/AIDS epidemic has grown on an unprecedented scale since it was first recognized, and presently it is considered as a well known global public health crisis. In making the health policy where millions of populations are at risk, it is necessary to understand the knowledge level about HIV/AIDS. So, this study aimed at to investigate the knowledge level about HIV/AIDS among the villagers. Data and necessary information were collected from one hundred villagers of Salmanpur from Comilla district, Bangladesh through a structured questionnaire. The collected data were used for univariate analysis, to carry out the description of the variables;and to justify the total score of knowledge about HIV/AIDS among the respondents, Cronbach’s alpha (α) was calculated. The results revealed that almost all the respondents (92.00%) were ever heard about HIV/AIDS and half of them (51.00%) were known it as a communicable disease. Majority of the respondents (62.00%) believed that it is caused by heterosexual relation as well as sex with HIV positive persons. However, a good number of respondents were found unaware about the major causes and preventive ways of AIDS. Less than half of the respondents (45.00%) had medium knowledge (α = 0.34 - 0.66) and only 36.00% had the enough knowledge about HIV/AIDS. The knowledge level is increasing with the increase of education level, and the respondents who involved in agricultural works are found the lowest knowledge level (47.00%) about HIV/AIDS. The villagers were known about HIV/AIDS but they do not have accurate information about the ways in which AIDS virus can or cannot be transmitted. Therefore, effective programs should be taken to increase the knowledge level about HIV/AIDS among the villagers in Bangladesh.展开更多
文摘Cronbach’s Alpha coefficient is the most popular method of examining reliability. It is typically used when the researcher has several Likert-type items that are summed or averaged to make a composite score. Distribution of alpha coefficient has been subjected of many studies. In this study relationship between randomness and Cronbach alpha coefficient were investigated and in this context, present study was examined the question“What is the distribution of the coefficient alpha when a Likert-type scale is answered randomly?” Data were generated in the form of five point Likert-type items and Monte Carlosimulation was run for 5000 times for different item numbers.
文摘The HIV/AIDS epidemic has grown on an unprecedented scale since it was first recognized, and presently it is considered as a well known global public health crisis. In making the health policy where millions of populations are at risk, it is necessary to understand the knowledge level about HIV/AIDS. So, this study aimed at to investigate the knowledge level about HIV/AIDS among the villagers. Data and necessary information were collected from one hundred villagers of Salmanpur from Comilla district, Bangladesh through a structured questionnaire. The collected data were used for univariate analysis, to carry out the description of the variables;and to justify the total score of knowledge about HIV/AIDS among the respondents, Cronbach’s alpha (α) was calculated. The results revealed that almost all the respondents (92.00%) were ever heard about HIV/AIDS and half of them (51.00%) were known it as a communicable disease. Majority of the respondents (62.00%) believed that it is caused by heterosexual relation as well as sex with HIV positive persons. However, a good number of respondents were found unaware about the major causes and preventive ways of AIDS. Less than half of the respondents (45.00%) had medium knowledge (α = 0.34 - 0.66) and only 36.00% had the enough knowledge about HIV/AIDS. The knowledge level is increasing with the increase of education level, and the respondents who involved in agricultural works are found the lowest knowledge level (47.00%) about HIV/AIDS. The villagers were known about HIV/AIDS but they do not have accurate information about the ways in which AIDS virus can or cannot be transmitted. Therefore, effective programs should be taken to increase the knowledge level about HIV/AIDS among the villagers in Bangladesh.
