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Balanced Value Impact Model

Longitudinal studies

Longitudinal studies study change over extended periods in the lives of individual people. They can also track changes in organisations and institutions. In a typical longitudinal study, the focus of observation is the same (or a comparable) group of people over an extended period. Data is collected at the outset of the study, then periodically throughout the study. Some longitudinal studies can last for several decades. The benefit is that researchers can look at changes over time, which is an essential concept within impact assessment. The downside is that such studies require significant investments, and it is hard to maintain the same people in the study over extended periods.

There are three main types of longitudinal study:

Panel Study: this involves sampling a cross-section of individuals.
Cohort Study: Involves selecting a group based on a specific event such as birth date, geographic location or historical experience.
Retrospective Study: Involves looking to the past by looking at historical information, such as medical records.

See the UK Longitudinal Studies Centre

The UK Data Service is a good source of longitudinal data that may be useful. Available here are studies such as the Community Life Survey tracking the trends and developments across areas key to encouraging social action and empowering communities.
https://www.ukdataservice.ac.uk/

The Mass Observation Archive specialises in material about everyday life in Britain. It contains papers generated by the original Mass Observation social research organisation (1937 to early 1950s), and newer material collected continuously since 1981 (Mass Observation Project). http://www.massobs.org.uk/

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