Accession Number : ADA201093


Title :   Explanatory Coherence and Belief Revision in Naive Physics


Descriptive Note : Technical rept.


Corporate Author : PITTSBURGH UNIV PA LEARNING RESEARCH AND DEVELOPMENT CENTER


Personal Author(s) : Ranney, Michael ; Thagard, Paul


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a201093.pdf


Report Date : Jul 1988


Pagination or Media Count : 24


Abstract : Students of reasoning have long tried to understand how people revise systems of beliefs. We maintain that people often change their beliefs in ways driven by considerations of explanatory coherence. This report describes computational model of how experimental subjects revise their naive beliefs about physical motion. First, instances are presented in which subjects changed their beliefs while learning elementary physics. Each of these cases involved an individual's attempt to explain a surprising observation. Next, we show how their belief revisions can be modeled using ECHO, a connectionist computer program that uses constraint satisfaction techniques to implement a theory of explanatory coherence. The resulting simulations even captured temporal characteristics of the observed changes in beliefs. Finally, the model's representational sensitivity and procedural robustness are discussed and one can show how ECHO can be used to generate empirical predictions about subjects' current beliefs. Keywords: Explanatory coherence; Belief revision; Naive physics; Connectionism.


Descriptors :   *REASONING , *LEARNING , PREDICTIONS , MOTION , PHYSICS , COMPUTATIONS , MATHEMATICAL MODELS , PHYSICAL PROPERTIES


Subject Categories : Psychology
      Cybernetics


Distribution Statement : APPROVED FOR PUBLIC RELEASE