These are the raw data file for Experiment 2 reported in the following publication:

Petrov, A.  (2010). Category rating is based on prototypes and not instances: 
  Evidence from feedback-dependent context effects. 
  Journal of Experimental Psychology: Human Perception and Performance, ?, ??-??.   
PDP preprint available at http://alexpetrov.com/pub/jephpp10/

The data was collected at the Ohio State University in 2009.  
This experiment was developed and stored under the name "CRFeedback2" (or "CRFB2" for short).

There is one file per subject. All files are in ASCII format.
Each file contains one row per trial and the columns listed below.
The header in each file has the following brief description:
%
% Data for Category Rating Experiment: CRFeedback2 [v.1.1.0, 2009-10-22]
% Laboratory for Cognitive Modeling and Computational Cognitive Neuroscience.
% Ohio State University. http://cogmod.osu.edu. Opening session on 28-Oct-2009.
% See CRFeedback2.m, import_CRFeedback2_data.m, and CRFeedback2_iScope1.log for details.
% *** Each row represents one trial. Variables (columns):
% 1=sbj, 2=group, 3=session, 4=blk, 5=schedule, 6=expT, 7=blk_tr, 
% 8=dry_run, 9=task, 10=categ, 11=orient, 12=feedbackp, 13=resp, 14=corr, 
% 15=RT, 16=bonus, 17=exitcode, 18=clock, 19=spare_ITI, 20=delta_msec, 21=frame_count, 
% 22=stim_msec
% * task convention: MOTION=1 TEXTURE=2 
% * schedule convention: FAST_LOW=1 SLOW_HIGH=2 UNIF=3 
% * dry_run convention: HUMAN_DATA=0 EXTENDED_DRY_RUN=1 QUICK_DRY_RUN=2 
% * exitcode convention: EC_OK=0 EC_BAD_KEY=1 EC_FAST_KEY=2 EC_INSTRUM=3 

In a little more detail, these variables represent the following:
%
%  sbj         -- subject number
%  group       -- 1-4; subject group
%  session     -- Always 1
%  blk         -- 1-13
%  schedule    -- 1=FAST_LOW, 2=SLOW_HIGH, 3=UNIF. See P.enum.block_enum
%  expT        -- experiment trial number
%  blk_tr      -- block trial number
%  dry_run     -- 0=HUMAN_DATA, 1=EXTENDED_DRY_RUN, 2=QUICK_DRY_RUN.
% ------------- Copies of the input arguments:
%  task        -- 1=MOTION, 2=TEXTURE. See P.enum.task_enum
%  categ       -- integer from 1 to P.design_params.N_categ
%  orient      -- motion direction or texture orientation, deg from vert
%  feedbackp   -- 1=feedback, 0=no_feedback
% ------------- Observer's behavior and timing:
%  resp        -- integer from 1 to P.design_params.N_categ
%  corr        -- 0=incorrect=(resp~=categ)  or  1=correct=(resp==categ)
%  RT          -- from the stimulus onset until the (valid) keypress, msec
%  bonus       -- new bonus points := old pts + bonus_params.policy(corr)
% ------------- Was it a successful trial or should it be re-run?
%  exitcode    -- 0=EC_OK,1=EC_BAD_KEY,2=EC_FAST_KEY; See exitcode_enum
% ------------- Instrumentation diagnostics
%  clock       -- seconds since beginning of session to stimulus onset
%  spare_ITI   -- Milliseconds available until Trial-Begin-Schedule
%  delta_msec  -- lower bound on RT accuracy [msec], see KbCheck
%  frame_count -- number of frames (=successful Flip's) in MOTION stimulus
%  stim_msec   -- Milliseconds stimulus was visible on the screen

See ../prog/CRFB2_empir_ARL_profile.m for the Matlab script that generated 
Figures 8-11 in the JEP:HPP paper.

-- Alex Petrov  2010-07-26



