Skip to main content

Assessing Impact: Metrics, Altmetrics and Impact Factors: Author Level Metrics

This guide highlights important metrics used to measure journal impact, author impact and article impact.

Author Level Metrics

Hirsch’s h-index (Available from multiple platforms)

  •  Single-number metric of an academic's impact, combining quality with quantity. 

Egghe’s g-index

  •  Aims to improve on the h-index by giving more weight to highly-cited articles.

Contemporary h-index 

  • Gives more weight to recent articles, thus rewarding academics who maintain a steady level of activity.

Age-weighed citation rate (AWCR) and AW-index

  • Measures the average number of citations to an entire body of work, adjusted for the age of each individual paper. 

Individual h-index (original)

  • Divides standard h-index by the average number of authors in articles, in order to reduce the effects of co-authorship.

Multi-authored h-index

  • Uses fractional paper counts to account for shared authorship and then determines the multi-authored hm index.

Individual h-index (PoP Alternative)

  • First normalizes the number of citations for each paper by dividing the number of citations by the number of authors (hl,norm), then calculates the h-index.. 

Average annual increase in the individual h-index (hl, annual) (PoP)

  • Calculates the average annual increase in hI,norm. 
  • Minimizes impact of discipline-specific publication and citation patterns. 
  • Reduces the effect of career length on metrics.

i10Index (Google Scholar Citations)

  • i10-Index = the number of publications with at least 10 citations.