Hackenberg, T. D. (2009).
Token reinforcement: A review and analysis.
Journal of the Experimental Analysis of Behavior, 91, 257-286.
Token reinforcement procedures and concepts are reviewed and discussed in relation to general
principles of behavior. The paper is divided into four main parts. Part I reviews and discusses previous
research on token systems in relation to common behavioral functionsreinforcement, temporal
organization, antecedent stimulus functions, and aversive controlemphasizing both the continuities
with other contingencies and the distinctive features of token systems. Part II describes the role of token
procedures in the symmetrical law of effect, the view that reinforcers (gains) and punishers (losses) can
be measured in conceptually analogous terms. Part III considers the utility of token reinforcement
procedures in cross-species analysis of behavior more generally, showing how token procedures can be
used to bridge the methodological gulf separating research with humans from that with other animals.
Part IV discusses the relevance of token systems to the field of behavioral economics. Token systems
have the potential to significantly advance research and theory in behavioral economics, permitting
both a more refined analysis of the costs and benefits underlying standard economic models, and a
common currency more akin to human monetary systems. Some implications for applied research and
for broader theoretical integration across disciplines will also be considered.
Key words: token reinforcement, conditioned reinforcement, symmetrical law of effect, cross-species
analysis, behavioral economics