XLBlocks: On the Effect of a Visual Language on Formula Creation and Comprehension in Spreadsheets

The use of spreadsheets in industry is widespread. Their outcomes are often used to substantiate critical business decisions. Unfortunately, spreadsheets are also error-prone. Consequently, companies risk making decisions based on inaccurate information, which eventually could lead to loss of money and reputation.<br/>This dissertation...

Challenges of end-user programmers: Reflections from two groups of end-users

The goal of this dissertation is to explore, understand, and mitigate when possible, the challenges that end-users face when creating their software programs. To gain a wider perspective of the challenges, we investigated two groups of end-users: spreadsheet users and school-age children learning to program.