Speed-accuracy trade-offs have long been of interest in human performance. General Systems Performance Theory (GSPT) was motivated by human performance measurement and modeling needs. It has subsequently been applied in those and other areas. In GSPT, all system performance attributes are modeled using a resource construct. Systems are characterized by multi-dimensional performance capacity envelopes (PCEs). The systems of interest here are considered to possess limited speed and accuracy performance resources defining a two-dimensional PCE. When considering human movement, relevance to Fitts’ law was conjectured. In multiple Fitts’ paradigm tasks, we found a near-perfect correlation between Index of Performance (IP) and PCE area. An almost exact prediction was obtained when scaled by Fitts' index of task difficulty (ID). While the well-known Fitts’ law equation does not contain accuracy explicitly, the GSPT-derived expression (CPS-A= ID • Speed • Accuracy) contains both speed (motions/s) and accuracy (hits/attempts). Concepts are applicable beyond human movement; e.g., to visual, auditory, or other information processing types.
DiSalvi, L. R.,
& Kondraske, G. V.
(2021). Speed-Accuracy Trade-Offs and General Systems Performance Theory: Novel Application to Fitts’ Law and Beyond. 37th International Symposium on Aviation Psychology, 214-219.