Fit Wagenmaker et al.'s (2007) EZ-diffusion model to single subject's aggregate/averaged data.

ezddm fits Wagenmaker et al.'s (2007) EZ-diffusion model for two-choice response time tasks using proportion correct, variance of correct response reaction times, and mean of correct reaction times (in seconds).

ezddm(
  propCorrect,
  rtCorrectVariance_seconds,
  rtCorrectMean_seconds,
  s = 0.1,
  nTrials = NULL
)

Arguments

propCorrect	proportion correct (apply edge correction if necessary)
rtCorrectVariance_seconds	variance of correct reaction times (in seconds)
rtCorrectMean_seconds	mean of correct reaction times (in seconds)
s	scaling parameter (often set to 0.1 or 1.0)
nTrials	number of trials (useful for edge correction) (optional)

Value

A dataframe with a (boundary parameter), v (drift rate parameter), and Ter (non-decision time parameter)

References

• Wagenmakers, E. J., van der Maas, H. L., & Grasman, R. P. (2007). An EZ-diffusion model for response time and accuracy. Psychonomic Bulletin & Review, 14(1), 3-22. doi:10.3758/BF03194023 (https://link.springer.com/article/10.3758/BF03194023)

Author

Hause Lin

Examples

ezddm(.802, .112, .723)
#>           a          v     Ter
#> 1 0.1399702 0.09993853 0.30003