Abstract
Certain features of operant behavior that are sensitive to the adverse effects of chemical exposure can be obscured by exclusive experimental reliance on global measures such as response rate. Temporal patterning of behavior is the clearest example. Reinforcement schedules studied in behavioral pharmacology and toxicology reveal novel consequences of chemical treatment when subjected to analyses of their temporal and serial properties. Fixed-ratio performance, for example, undergoes not only changes in response rate, but also displays distinctive shifts in inter-response time patterning, changes in the interresponse time distribution, and deterioration in what might be termed the cohesiveness of the ratio. Variable-interval performance also may change in distinctive ways that produce altered response patterning without marked changes in rate. Sequential dependencies, as measured by techniques of time series analysis, may also reveal effects not reflected by response rates. Spaced responding and autoregressive schedules provide examples. The serial and temporal properties alluded to above can be described and analyzed by a variety of quantitative techniques that also yield information of theoretical interest.
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