Australasian Mathematical Psychology Conference 2019

# I don’t know… how to model this.

Angus Reynolds
Andrew Heathcote
University of Tasmania
Peter Kvam
Ohio State University
We present the Multiple Threshold Race (MTR)- a framework to extend simple evidence accumulation models such as the Linear Ballistic Accumulator to judgments on a continuum rather than simple definitive response. The simplest example is to include a “Don’t Know” response as well as two definitive responses. We ran two facial recognition experiments: a two-alternative forced choice and a single item new/old identification task. In both experiments subjects could respond Don’t Know’ as well as Left/Right or New/Old.