Aggregation of Multi-Item (Likert) Scales If your survey includes multiple items to measure a construct – such as satisfaction, trust, or stress – at some point, you’ll face the question: How do I combine the individual responses into an overall score? This article is all about that. You’ll learn: Which aggregation methods exist (e.g., mean, […]

Likert Scales: Everything You Ever Wanted to Know – But Never Dared to Ask In this article, we cover the most important general considerations when constructing Likert scales. However, if you're looking for concrete examples and phrasing suggestions, check out our other blog post with a comprehensive overview of common Likert scales.   In this [...]

List of Common Likert Scales Likert scales are among the most popular response formats in survey research. Originally developed to measure attitudes, they have long been established as a structured and comprehensible way to capture many other concepts as well. No wonder: They’re simple, versatile – and still deliver meaningful, easily interpretable results. We frequently [...]

Sample Size Calculation: Technical Details Explained Simply How many participants are enough? Everyone planning a survey asks this question. Luckily, science has an answer! In this article, we explain how to determine the required sample size and show you how to calculate it yourself. If you're not interested in the technical details and want to [...]

Sample Size Calculator: Easily Calculate the Sample Size How many participants do I need to survey to ensure my survey is representative? You can quickly and easily answer this question—or calculate the sample size—with QUESTIONSTAR's Sample Size Calculator. The meaning of the required parameters is clearly explained in this article. If you prefer to understand [...]