Data2EZ: Convert observed sample moments to diffusion parameter values

In EZ2: Modeling Human Response Times and Accuracy using the EZ/EZ2 Diffusion Model

Description

Converts proportion correct (Pc), response time variance (VRT), and response time mean (MRT), to EZ diffusion model parameters.

Usage

Data2EZ(Pc, VRT, MRT, s = 0.1)

Arguments

Pc	Proportion of correct responses.
VRT	Variance of the response times in seconds.
MRT	Mean of the response times in seconds.
s	Scale parameter for the parameters (Ratcliff's convention is s = 0.1, the default).

Details

Use of MRT is optional; if MRT is absent Ter will not be computed.

Value

A list with estimates

v	Drift rate
a	Boundary separation
Ter	Non-decision time (is NA if MRT is absent)

Author(s)

Raoul Grasman

References

Grasman, R.P.P.P., Wagenmakers, E.-J.& van der Maas, H.L.J. (2009). On the mean and variance of response times under the diffusion model with an application to parameter estimation. Journal of Mathematical Psychology, 53(2), 55-68.

See Also

EZ2batch

Examples

    Data2EZ(Pc=0.8022, VRT=0.112035, MRT=0.7231)

EZ2 documentation built on May 2, 2019, 6:20 p.m.