![]() In mouse-tracking experiments, participants typically choose between different response options represented by buttons on a screen, and the position of the mouse cursor is continuously recorded while participants move towards and finally settle on one of the alternatives (Freeman & Ambady, 2010). Mouse-tracking – the recording and analysis of mouse movements in computerized experiments – is becoming an increasingly popular method of studying the development of cognitive processes over time. Mousetrap is cross-platform, open-source and available free of charge from. In addition, the recorded data can be imported directly into the statistical programming language R using the mousetrap package, which greatly facilitates analysis. Thus, researchers can benefit from the core features of a validated software package and the many extensions available for it (e.g., the integration with auxiliary hardware such as eye-tracking, or the support of interactive experiments). By integrating with this existing experimental software, mousetrap allows for the creation of mouse-tracking studies through a graphical interface, without requiring programming skills. In particular, we introduce and demonstrate the mousetrap plugin that adds mouse-tracking to OpenSesame, a popular general-purpose graphical experiment builder. In the current article, we present software that offers easy and convenient means of recording and analyzing mouse movements in computerized laboratory experiments. Using mouse-tracking, researchers have gained insight into the temporal development of cognitive processes across a growing number of psychological domains. ![]() Mouse movements are taken as an indicator of commitment to or conflict between choice options during the decision process. ![]() Mouse-tracking – the analysis of mouse movements in computerized experiments – is becoming increasingly popular in the cognitive sciences.
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