# Code descriptions
This wiki provides descriptions for the codes used in the manuscript "Signatures proposed to index perceptual effects emerge in a purely cognitive task".
## Preprocessing data
"code_preprocess.ipynb" reads raw data files from each of the three experiments ("data_raw_expX.csv" where X is either "1", "2", or "3") and transforms them into data for following model fitting and analyses.
Data files for drift-diffusion model fitting and analyses are saved as "data_hddm_expX.csv".
Data files for choice, confidence, and RT fitting and analyses are saved as "data_processed_expX.csv".
## Drift-diffusion model fitting
"code_fitting_ddm.ipynb" reads data files separately for each of the three experiments ("data_hddm_expX.csv") and fits drift-diffusion models.
For each experiment, the script generates posterior samples for each subject. Samples from subject K are saved as "sampleK.csv" where K is the subject index.
## Drift-diffusion model analyses
"code_analyses_ddm_expX.ipynb" reads DDM parameters from all subjects in experiment X (sampleK.csv for all K values in experiment X) and performs analyses.
## Choice, confidence, and RT fitting
"code_fitting.ipynb" reads data files separately for each of the three experiments ("data_processed_expX.csv") and fits raised Gaussian functions to choice, confidence, and RT.
For each experiment, the script saves parameters from both the population-level fitting and the individual-level fitting.
Parameters from population-level fitting are saved as "optpar_choice_expX.csv", "optpar_confidence_expX.csv", and "optpar_RT_expX.csv" separately for choice, confidence, and RT fitting.
Similarly, parameters from individual-level fitting are saves as "optpar_choice_sbj_expX.csv", "optpar_confidence_sbj_expX.csv", and "optpar_RT_sbj_expX.csv".
## Choice, confidence, and RT analyses
"code_analyses_expX.ipynb" reads parameters from both the population-level fitting ("optpar_choice_expX.csv", "optpar_confidence_expX.csv", and "optpar_RT_expX.csv") and the individual-level fitting ("optpar_choice_sbj_expX.csv", "optpar_confidence_sbj_expX.csv", and "optpar_RT_sbj_expX.csv") and performs analyses.
Please email sixing.chen@nyu.edu for any question or feedback.
