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The Times Higher Education World University Rankings 2018 psychology subject ranking includes a range of narrower subject areas.

The list of subjects used to create this ranking is:

• Psychology
• Educational / sport / business / animal psychology
• Clinical psychology

The subject tables employ the same range of 13 performance indicators used in the overall World University Rankings 2018, brought together with scores provided under five categories.

However, the overall methodology is carefully recalibrated for each subject, with the weightings changed to suit the individual fields.

The weightings for the psychology ranking are:

• Teaching: the learning environment
  27.5 per cent
• Research: volume, income and reputation
  27.5 per cent
• Citations: research influence
  35 per cent
• International outlook: staff, students and research
  7.5 per cent
• Industry income: innovation
  2.5 per cent

No institution can be included in the overall World University Rankings unless it has published a minimum of 1,000 research papers over the five years that we examine.

For the 11 subject tables, the thresholds are set differently. For psychology, the threshold drops to 150 papers published in this discipline over the last five years. And we expect an institution to have at least 1 per cent of its staff working in this discipline in order to include it in the subject table.