I am developing a numerical discrimination task in SuperLab 4.5, in which participants are presented with a set of Arabic numerals and are instructed to determine the numerically larger option during a paired presentation. For each block, SuperLab retrieves 14 events from predefined stimulus lists and randomizes the order for each participant. The experiment works as planned, with 14 stimulus presentations and response screens per block, but the output file randomly contains multiple instances of the same stimulus with different response times, e.g:
Quote:
Originally Posted by SuperLab Output
3 Block1 Arabic1, 1 ArabicResp1 (1, 1 6) (based on code value) NR 0
3 Block1 Arabic1, 2 ArabicResp1 (2, 4 8) J j Pressed (based on code value) C 730 3 Block1 Arabic1, 3 ArabicResp1 (3, 7 3) F f Pressed (based on code value) C 235 3 Block1 Arabic1, 3 ArabicResp1 (3, 7 3) F f Pressed (based on code value) C 1268 3 Block1 Arabic1, 4 ArabicResp1 (4, 5 1) F f Pressed (based on code value) C 308 |
For instance, the same five trials for participant 1 do not show this behavior:
Quote:
Originally Posted by SuperLab Output
1 Block1 Arabic1, 1 ArabicResp1 (1, 1 6) (based on code value) NR 0
1 Block1 Arabic1, 2 ArabicResp1 (2, 4 8) J j Pressed (based on code value) C 960 1 Block1 Arabic1, 3 ArabicResp1 (3, 7 3) (based on code value) NR 0 1 Block1 Arabic1, 4 ArabicResp1 (4, 5 1) F f Pressed (based on code value) C 749 1 Block1 Arabic1, 5 ArabicResp1 (5, 7 2) F f Pressed (based on code value) C 586 |
I am running SuperLab version 4.5.4 on a 12" Macbook (early 2015), using MacOS Sierra 10.12.3.
Thank you for your time and help!