Readability of a diagrammatic query language

Researchers have developed different visual query languages to improve end-user interaction with data. Still, none of these languages have become a de facto standard. We have developed yet another diagrammatic query language, but we have made a step forward in usability by using crowdsourcing user studies to identify problems in the readability of the developed language. We used the study results to improve the developed language and measured the readability improvements of the changes.