The impact factors of a journal measure the number of times those articles are cited by other researchers.

Question

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The impact factor of a journal is a measure of the average frequency with which the "average article" in a journal has been cited in a particular year or period. It is calculated by dividing the number of citations in the denominator (total number of articles published) in the numerator. Thus, impact factor is related to how frequently articles in a particular journal are cited by other researchers.

The Impact Factors of a Journal Measure the Number of Times