Materials are available for download in the Files section.
A note from Dr. Campbell: "I have attached the two VisualBasic programs that were used to run the study (you can view them as text files) and also the raw data files that were generated by those programs for that experiment. NR5_v1.bas was used for the multiply-at-test group and NR6_v1.bas was used for the factor-at-test group. Please note that there is code included for recording participants’ self-reported strategies but that feature was no enabled for this experiment.
The first line of each data file contains demographic info (subject number, age, sex, handedness, and reported first language for arithmetic (e=English). Below is the first few lines from a data file. If you wished, you could use these files to reconstruct the same random problem sequences used in the original experiment.
The first line is the participant demographics (subject 1, 18 years, male, right handed, English). The second line provides the testing date and time the program was started and when it wrote the data file. Subsequent lines contain the information recorded for each trial.
For factoring trials (the trial record has an F at the end), the first two characters are the factors, the next number is the displayed product for factoring, the next is the participant’s typed response, the two next numbers are the RTs recorded for their 1st and 2nd key press, then block number and trial number. Basically, the same information is provided for the multiplication trials (the trial record ends in M).
Most of the participants learned their arithmetic in English in Canada, which is middle of the pack in math skills. Ideally, a replication should attempt to sample this population because there are wide cross-national differences in arithmetic training and skill development."
Note from the Replicators (Ricker & Saide): CR2008E3r.9.es is a Program file created by Dr. Campbell to run a new version of the task in Eprime 2. This was the task used for the replication study, and is as close as possible as Dr. Campbell could get us to the original task programed in VisualBasic.
