plot_model_fit function

Plot model fit against human error data (target errors)

plot_model_fit(
  participant_data,
  model_fit,
  model,
  unit = "degrees",
  id_var = "id",
  response_var = "response",
  target_var = "target",
  set_size_var = NULL,
  condition_var = NULL,
  n_bins = 18,
  n_col = 2,
  palette = "Dark2"
)

Arguments

• participant_data: A data frame of the participant data, with columns containing: participant identifier ('id_var'); the participants' response per trial ('response_var'); the target value ('target_var'); and, if applicable, the set size of each response ('set_size_var'), and the condition of each response ('condition_var').
• model_fit: The model fit object to be plotted against participant data.
• model: A string indicating the model that was fit to the data. Currently the options are "2_component", "3_component", "slots", and "slots_averaging".
• unit: The unit of measurement in the data frame: "degrees" (measurement is in degrees, from 0 to 360); "degrees_180 (measurement is in degrees, but limited to 0 to 180); or "radians" (measurement is in radians, from pi to 2 * pi, but could also be already in -pi to pi).
• id_var: The column name coding for participant id. If the data is from a single participant (i.e., there is no id column) set to "NULL".
• response_var: The column name coding for the participants' responses
• target_var: The column name coding for the target value
• set_size_var: The column name (if applicable) coding for the set size of each response
• condition_var: The column name (if applicable) coding for the condition of each response
• n_bins: An integer controlling the number of cells / bins used in the plot of the behavioural data.
• n_col: An integer controlling the number of columns in the resulting plot.
• palette: A character stating the preferred colour palette to use. To see all available palettes, type ?scale_colour_brewer into the console.

Returns

The function returns a ggplot2 object visualising the mean observed response error density distribution across participants (if applicable) per set-size (if applicable) and condition (if applicable) together with the model predictions superimposed.