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Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly

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A two-stage model for concurrent sequences.

Susan M Schneider¹

¹Department of Psychology, Florida International University, Miami, FL 33199, United States. schneids@fiu.edu

Behavioural Processes

|April 11, 2008

Summary

This summary is machine-generated.

The generalized matching law fails for concurrent free-operant sequences with temporal spacing. A new two-stage sensitivity model better explains behavior, distinguishing between response distribution and order sensitivity.

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Area of Science:

Behavioral science
Animal behavior
Reinforcement learning

Background:

The generalized matching law (GML) successfully models concurrent free-operant behavior.
Its application to two-response sequences is limited when temporal spacing between responses is required.

Purpose of the Study:

To investigate the limitations of the GML in concurrent free-operant sequences with temporal spacing.
To propose and evaluate an alternative "two-stage sensitivity" model.

Main Methods:

The study analyzed data from pigeons and rats performing concurrent free-operant tasks.
A novel "two-stage sensitivity" model was developed and compared to the GML.
Model fits were evaluated using the Akaike criterion.

Main Results:

The GML did not adequately fit data when significant temporal spacing was required between responses.
The "two-stage sensitivity" model, with parameters for response distribution and order sensitivity, provided a better fit.
Rats required a minimum inter-response time (IRT) for sequence matching, unlike pigeons.

Conclusions:

The "two-stage sensitivity" model offers a more parsimonious and accurate explanation for behavior in concurrent free-operant sequences with temporal spacing.
The findings suggest distinct mechanisms for sensitivity to reinforcement contingencies based on temporal spacing and response order.
The model provides new insights into the fundamental mechanisms of behavioral units.