Gestures are physical manifestations of cognitive processes. Geology students often use gestures to describe geologic features and processes. The gestures allow students to convey 3- and 4-dimensional information about the rocks. Studying and characterizing these gestures can be useful in understanding students' learning processes; however,…

Models of category learning have been extensively studied in cognitive science and primarily tested on perceptual abstractions or artificial stimuli. In this paper, we focus on categories acquired from natural language stimuli, that is, words (e.g., "chair" is a member of the furniture category). We present a Bayesian model that, unlike…

Prior studies have shown that students have difficulty understanding the role of mutation in evolution and genetics. However, little is known about unifying themes underlying students' difficulty with mutation. In this study, we examined students' written explanations about mutation from a cognitive science perspective. According to one cognitive…