1. Peter Ingwersen, IVA, Denmark University College, Oslo, Norway 2011
Crown Indicators
2011
Ingwersen

2. ‘Crown indicators’
Normalized impact-indicators for one unit (center/university/country) in relation to research field globally:
JCI : Journal Crown Indicator
FCI : Field Crown Indicator – both provide an index number
Ingwersen
2011

3. Journal Crown Indicator
The ratio between:
- the real number of citations received for all journal articles in a unit, and
- the diachronic citation impact of the same journals used by the unit, covering the same period (= the expected impact).
ONE WOULD NEVER APPLY THE ISI-JIF!!
Since it only signifies the AVERAGE (international) impact of an article made in a synchronous way
Ingwersen
2011

4. Field Crown Indicator - FCI
Normalisation must be weighted in relation to the observed unit’s publication profile:
Like a ’shadow’ unit (country)
An example of this weighting for India – applying Nat. Sc. Indicators:
Ingwersen
2011

5. Research profile as weight for impact calculation (as ‘shadow country’)
Ingwersen
2011

6. Research profile (China) as weight for impact calculation (as ‘shadow country’)
Ingwersen
2011

7. A small European country with very different profile
Ingwersen
2011

8. Example of
research
profile with
FCI-index score
Ingwersen
2011

9. Van Raan, Århus præsentation, 2006

10. Summary: Different indicators – one given period
Σc/Σp / ΣC/ΣP – Globally normalized impact:
For single fields it is OK to use!
If averaged over all subject areas: quick’n dirty!: all areas have the same weight! – thus:
Σc / Σ(C/Parea x parea ) = FCI:
Standard Field Crown Indicator (FCI) for ’profile’ of subject areas for a local unit (country/university) – via applying it as global profile, like a kind of ’shadow unit’.
Made as ratio of sums of citations over publications (weights)
(If done as sum of rations divided by fields: all fields equal)
Ingwersen
2011

11. Other Indicators (FCIunit) x punit = Brute Force
JCIunit / FCIunit = Rel. Impact of applied journal set in unit
Citedness: Percent of publications cited at least once in given period.
May often explain high impact in a field/unit
Contribution to top 5; upper quartile … of a field’s central journals
Ingwersen
China 2008