The Rescorla-Wagner Formula (alpha and beta version) calculator computes the change in strength on a single trial of the association between the conditioned stimuli and the unconditioned stimuli.
INSTRUCTIONS: Enter the following:
Change in Strength (ΔV): The calculator returns the value for change in the strength (ΔV), on a single trial, of the associate between the conditioned stimuli and the unconditioned stimuli.
Note: The parameters α and β are bound by zero and one. Therefore they can not be less than zero or greater than one.
The Rescorla–Wagner model describes the changing strength of the relationship between a conditional stimulus (CS) and an unconditional stimulus (US) over a series of trials where the stimuli are paired. In the model, λ represents the actual occurrence of the US and V is the expectation based on the existing associations between the US and the stimuli that precede it. Consequently the difference between λ and V represents the amount of surprise an organism presumably experiences when the US occurs on a particular trial. The constants α and β can vary from 0 to 1 and represent the salience of the CS and US, respectively. The product of these constants represents the rate at which learning can occur. ΔV is the amount of change in associative strength that occurs on a trial. This calculator reports the value of ΔV for a particular trial. Adding ΔV to the starting value of ΔV gives the new value of V at the end of the trial.
There is additional information presented on the Rescorla-Wagner Model.
A simplified version of the Rescorla-Wagner Model is provided HERE.
The Psychology and Statistics Calculator contains useful tools for Psychology Students. The psychology statistics functions include the following: