摘要
This study aims to investigate the efficacy of journal cumulative impact factors(CIFs)and annual impact factors(AIFs)in the evaluation of science journals.We screened U.S.ophthalmological journals based on the SCI database by the inclusive and exclusive criteria.The CIFs and AIFs were calculated based on the citation data of the screened SCI-indexed ophthalmological journals in Web of Science ranging from 1-y to 10-y data,year by year.The peer review scores of these journals were obtained through questionnaire surveys issued to U.S.ophthalmologists,which were recognised as the golden standard for journal evaluation.The effects of CIFs and AIFs on journal evaluation were analyzed and compared,followed by the assessment of the correlation of peer review scores with journal CIFs and AIFs.We found that both AIFs and CIFs were positively correlated with the peer review score,but the correlation coefficient of CIFs with peer review score outweighed that of AIFs with peer review score in the same time window excluding 3-y and 6-y CIF.From the correlation analysis,the 7-y CIF had the strongest correlation with peer review score(r=0.706,P=0.000),so CIF at the 7-y time window was the optimum parameter with regards to U.S.ophthalmologic journal evaluation in this study.Finally,there were four journals which were indexed in Web of Science over a long time period,of which the CIFs did not grow persistently.Therefore,we thought that more attention should be paid to the cumulative citation counts made from the first year when the source items were published.The optimum time window was still a controversial issue as research areas have variable citation characteristics.
