What it means
The starting measurements in a study. Researchers use these to compare what participants were like at the start with what happens later.
Examples on this page are illustrations, not findings from the research cards.
Worked example
Before a training programme starts, researchers measure workers’ earnings. That first measurement is the baseline.
Hypothetical example: a group reports average weekly savings of ₹200 before a programme begins. At the next survey, its average is ₹260. The baseline is ₹200, and the observed increase is ₹260 − ₹200 = ₹60.
That calculation describes the change. It does not show that the programme caused all ₹60 of it. If seasonal work also improved earnings, some increase might have happened anyway. A suitable comparison helps researchers investigate that question.
A closer look
A baseline records the starting position before researchers examine later change. It might include earnings, savings, wellbeing or other information about participants. In a study testing a programme, these measurements are usually collected before participants receive the options being compared. The baseline gives later measurements a reference point: an amount at the end means something different depending on where someone started.
Researchers can also use baseline information to understand whether comparison groups started in similar circumstances. A baseline is a measurement point, not an explanation for what happens next. Seasonal work, prices, other support and events outside the programme may change people's lives too. To estimate the programme's effect, researchers need a credible comparison with what would have happened without it.
A common misunderstanding
A change from baseline does not, by itself, prove that a programme caused the change.
Check the explanation
Sources
The wording and examples are original explanations informed by these references.
Cite this explanation
Baseline. aikyam school. https://aikyam.school/glossary/baseline/
Used in these cards
227 cards use this term
The original research wording is preserved in these cards.
