Archive for July, 2015

July 30, 2015

Easy fit of psychometric functions

Using psych.function you can fit the data of the single participant (via call of standard glm function), estimate JND and PSE via delta method and plot the model predictions. The names of the Arguments are consistent with standard glm and lines function preceded by “ps.”; example ps.formula,, ps.col, etc. For the moment only works for univariable psychometric functions (lazy Italians…). See MERdemo.R and the on line tutorial for details. Write me for feedback/suggestions! 🙂