Together with my colleague and lab PI, Louise Connell, I have developed a new measure of semantic distance between concepts. It is based on the senses and body parts involved in experiencing those concepts — in other words it is fully grounded in sensorimotor experience. This sets it aside from other measures of semantic distance, such as those based on distributions of words in language, on encyclopaedic databases, or on lists of properties or features. It also is fairly comprehensive (thanks to the expansive norms collected by colleagues), with distances available for nearly 800,000,000 pairs of concepts.
The measure is described in a new preprint, and you can search, visualise and play around with the distances (e.g. the above image) using an online app I also developed.
I have recently submitted a paper based on some work I have been doing at my job at the Embodied Cognition Lab at Lancaster University. In it, we look at a large set of linguistic distributional models commonly used in cognitive psychology, evaluating each on a benchmark behavioural dataset.
Linguistic distributional models are computer models of knowledge, which learn representations of words and their associations from statistical regularities in huge collections of natural language text, such as databases of TV subtitles. The idea is that, just like people, these algorithms can learn something about the meanings of words by only observing how they are used, rather than through direct experience of their referents. To the degree that they do, they can then be used to model the kind of knowledge which people could gain in the same way. These models can be made to perform various tasks which rely on language, or predict how humans will perform these tasks under experimental conditions, and in this way we can evaluate them as models of human semantic memory.
We show, perhaps unsurprisingly*, that different kinds of models are better or worse at capturing different aspects of human semantic processes.
*unsurprising to you as you read this, perhaps, but actually this is the largest systematic comparison of models as-yet undertaken, and thereby the first to actually effectively weigh the evidence on this question.
I've just started a new job at Lancaster University, working as a postdoc in Louise Connell's lab. I'll be looking at the roles of linguistic representations and sensory simulations in human cognition. You can read more about the lab's research aims on its website.
Update: Louise has now moved to Maynooth University, and the old lab's page at Lancaster has ceased to exist. But you can easily find out the kind of things Louise's colleagues worked on at her new page.