In a classical conditioning graph, Spontaneous Recovery occurs after a pause following the first extinction. The line begins midway up the y-axis, indicating a recovered strength of the Conditioned Response (CR). As the Conditioned Stimulus (CS) is presented alone again, the line drops sharply to the bottom, indicating a second, rapid extinction phase.

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A chart illustrates the four main stages of classical conditioning over time. The x-axis represents time, and the y-axis represents the strength of the Conditioned Response (CR). The four columns of graphed data represent Acquisition, Extinction, a Pause, and Spontaneous Recovery followed by further Extinction.

Classical Conditioning Stages Graph

Spielman, R. M., Jenkins, W. J., & Lovett, M. D. (2020, April 22). Psychology (2nd ed.). OpenStax. https://openstax.org/books/psychology-2e/pages/1-introduction

OpenStax Psychology (2nd ed.) Textbook

In a classical conditioning graph, the Acquisition phase involves pairing the Conditioned Stimulus (CS) with the Unconditioned Stimulus (UCS). This is shown by a line that rises steeply from the bottom to the top, indicating a rapid increase in the strength of the Conditioned Response (CR).

Classical Conditioning Acquisition Graph

In a classical conditioning graph, the Extinction phase involves presenting the Conditioned Stimulus (CS) alone without the Unconditioned Stimulus. This is illustrated by a line that drops rapidly from the top to the bottom, showing a rapid decrease in the strength of the Conditioned Response (CR).

Classical Conditioning Extinction Graph

In a classical conditioning graph, the Pause phase follows the initial extinction. This is represented by a column with no line, indicating a period where no stimulus is presented and no response is recorded.

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