Impact Evaluation

“Objective test of what changes have occurred and the extent to which these can be attributed to the policy” [intervention/service]

Magenta Book (2011)
http://gov.uk/government/publications/the-magenta-book

Inception cohort study

A group of individuals identified for subsequent study at an early, uniform point in the course of the specified health condition, or before the condition develops.

Incidence

The number of new cases of illness commencing, or of persons falling ill, during a specified time-period in a given population.

Intention-to-treat

Characteristic of a study where patients are analysed in the groups to which they were originally assigned, even though they may have switched treatment arms during the study for clinical reasons.

Interpretive

Description of activity that identifies and explains meaning, usually from a particular perspective

Interpretivism

This employs subjectivity and is characterised by multiple realities; meanings that individuals attach to experiences and views of the world and utilises qualitative methodologies. Its language is that of words.