1 / 3 · Population
Start your first study
From a clear question to choosing a method: the foundations of a sound study.
Reading progress stays in this browser only and is removed when you clear site data.
Research question
2 min · Good research starts with a clear question.Hypothesis
2 min · An expectation that can be tested with evidence.Population
2 min · Who do you want your findings to describe?Sample
3 min · A small part selected to help us understand the whole.Leading question
2 min · The wording can steer the answer.Review in three questions.
Review the concepts in this path with short questions. Read the explanation after each answer and revisit a concept if needed.
2 / 3 · Sample
A large sample is always representative.
3 / 3 · Leading question
Positive adjectives in a question can influence responses.
Quiz summary
This summary shows your latest answers and resets when you reload the page.
Put this learning path into practice.
Choose a guide connected to the concepts in this path. These optional activities do not count towards your reading progress.
Add a reference by DOI
Import article metadata without typing the whole citation.
Connected concepts in this path: Research question
Narrow a research search
Move from a broad topic towards relevant publications.
Connected concepts in this path: Research question
Build concept-based queries
Make a health-literature search understandable and reproducible.
Connected concepts in this path: Research question
Read the data dictionary before analyzing
Use the OpenAI Signals dictionary to distinguish row units, measures and comparison groups.
Connected concepts in this path: Population