There has been a pressing need for publication in journals that have Impact Factore for the purpose of obtaining the promotion of university science in Journals possessing an Impact Factore
Well , I have very little understanding !! would agree with Prof Al_Ani
Dear Dr Raid M. Al-Ani
What is 40 , 60, and 100 ?
Do you mean IF= 1 always?!
Agree with the above views by Prof. Ani and Prof. Dickson....
As part of a study assessing the effect of journal prestige on physicians' assessments of study quality [8], we mailed questionnaires to 416 physicians specializing in internal medicine in the United States. We recruited half of our sample (practitioner group) from the American Medical Association's (AMA's) master list of licensed physicians. This database is not limited to AMA members and is acknowledged to be the most complete repository of physicians' names, addresses, specialties, and primary activities (e.g., office practice, hospital practice, research, etc.) in the United States. The 208 practitioners we surveyed for our study were randomly selected from the approximately 110,000 U.S. physicians who listed internal medicine as their primary specialty, by the vendor who dispenses data from the AMA's master list.
We used a random number generator (STATA, version 5.0) to select the other half of our sample (research group) from the alumni directory of the Robert Wood Johnson Clinical Scholars Program, a national postdoctoral training program for physicians. Graduates of this program have typically received training in clinical research, epidemiological research, health services research, or a combination of these. Our intent in including this group was to enrich the sample with physicians likely to be engaged primarily in research to determine whether the correlation between impact factor and journal quality was higher for researchers than for practitioners, as we hypothesized it would be.
We asked respondents to rate the overall quality of nine general medical journals on a scale from 1 to 10, with 10 being the highest rating. We chose journals that we believed spanned a broad range of perceived quality and would be familiar to internists in the United States: American Journal of Medicine (AJM), Annals of Internal Medicine (Annals), Archives of Internal Medicine (Archives), Hospital Practice (HP), JAMA, Journal of General Internal Medicine (JGIM), The Lancet, New England Journal of Medicine (NEJM), and Southern Medical Journal (SMJ). All of these journals are categorized as journals of “clinical medicine” by ISI.* Some also publish basic science research and are therefore categorized as “life sciences” journals as well. We included these “hybrid” journals (AJM, Annals, Archives, JAMA, Lancet, NEJM) because we believed they represented journals commonly used and recognized by clinicians in the United States. We compared mean quality ratings between journals using t tests.
We obtained each journal's impact factor from 1997 [9], because our survey sampled physicians' opinions in the early part of 1998. We then calculated the correlation (squared value of Pearson's correlation coefficient) between the natural logarithm of impact factor and physicians' mean quality ratings for the nine journals, using first the entire sample and then the practitioner and research groups separately. We transformed impact factor logarithmically because the relationship between impact factor and quality ratings was nonlinear. Such transformations are generally appropriate when using linear modeling to test nonlinear associations.
We also asked respondents to report whether they subscribed to and regularly read each of the nine journals. We examined the correlation of reported journal quality with subscription rates and readership rates to evaluate how impact factor compared as a marker of journal quality with these rates, which represented alternate ways in which physicians “vote” for high-quality journals.
To account for the possibility that some respondents were not familiar with JGIM (a subspecialty journal), The Lancet (a foreign journal), and SMJ (a regional journal), we repeated our analyses after excluding ratings for each of these journals.
This link is very useful
https://en.wikipedia.org/wiki/Impact_factor
regards
I actually don't believe impact factor is a realistic concept. Its a relative thing .I shall take time to read through and see if I can believe for once.
I agree fully with Dr Raid and Jawad Ali. The links provided by Dr Dickson are very useful.
The response from Abiodun is sensible to a great extent. Personally, I believe in doing a great job. Quality research back in the days never enjoyed the IF brouhaha before their breakthroughs.
The impact factoris a measure of the frequency with which the average article in a journal has been cited in a particular year. It is used to measure the importance or rank of a journal by calculating the times it's articles are cited.
The calculation is based on a two-year period and involves dividing the number of times articles were cited by the number of articles that are citable.
Calculation of 2010 IF of a journal:
A = the number of times articles published in 2008 and 2009 were cited by indexed journals during 2010.
B = the total number of "citable items" published in 2008 and 2009.
A/B = 2010 impact factor
The impact factor for a particular journal is the number of times the research published in the journal has been cited during the two years preceding the year of calculating the impact factor divided by the total number of researches published in that journal during those two years.
The criterion of the impact factor faces many criticisms. In addition to the debate over the feasibility of standard measures of citations, the criticisms revolve around the validity of this parameter, the possibility of misuse by some researchers, and the mistakes that can be made when using it.
The self-citation may be used by some to increase the impact factor through the agreement of some research with some. Also some journals may adopt a certain publishing policy to increase the impact factor without actually raising the scientific level of the journal.
The European Association of Scientific Editors (EASE) recommended that researchers should be cautious in dealing with these researchers and journals, as well as using the impact factor for those researchers and magazines in measuring the level of research and scientific journals.
I have been tutored on the IF computaton. Thanks Sarhat, Isam and others
Impact factor Citation = Citation in Y-1 + Citation in Y-2/ Published in Y-1 + published Y-2
Impact Factor Journal = IS in Y-1 + IS in Y-2/ Published in Y-1 + published Y-2
Courtesy/reference : Dr. Syed Asif Ali Shah, Dean , SMIU, Karachi
Dear Muthana A.K. Al-Zobaei Al-Zobae , it is an interesting question.
Impact Factor: It is a measure of the frequency in which the average article in a journal is cited in a particular year. Impact factors measure the impact of a journal, not the impact of individual articles.
The calculation is based on a two-year period and involves dividing the number of times articles were cited by the number of articles that are citable.
For example: Calculation of 2015 IF of a journal:
A = the number of times articles published in 2013 and 2014 were cited by indexed journals during 2015.
B = the total number of "citable items" published in 2013 and 2014.
A/B = 2015 impact factor
References
- Seglen, P. O. (1997). Why the impact factor of journals should not be used for evaluating research. British Medical Journal, 314(7079), 498-502.
- Johnstone, M. J. (2007). Journal impact factors: Implications for the nursing profession. International Nursing Review 54(1), 35-40.
- Ironside, P. M. (2007). Advancing the science of nursing education: Rethinking the meaning and significance of journal impact factors. Journal of Nursing Education, 46(3), 99-100.
- Satyanarayana, K. & Sharma, A. (2008). Impact factor: Time to move on. The Indian Journal of Medical Research, 127(1), 4-6.
- Greenwood, D. C. (2007). Reliability of journal impact factor rankings. BMC Medical Research Methodology, 7(48), 48.
- Howard, J. (2009). Humanities journals confront identity crisis. The Chronicle of Higher Education, 55(19), A1.
this link is useful
https://en.wikipedia.org/wiki/Impact_factor
regards
Dr Jack Son,
Thanks for the details of the research method. But I could not find the result of your study. What was the relation between Impact Factor and Judgement of the sample?
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