CNP task code can leave timing fields at zero after early responses, consistent with 941 ds000030 stop trials in snapshot 00016

We inspected published CNP task code and 533 public stop-signal event files from OpenNeuro ds000030, snapshot 00016. The code initializes a timing field to zero. An early response can end the loop before the field is filled. All 941 zero-delay stop trials had a positive planned delay and a response before that plan. This pattern supports an unfilled timing-field interpretation. The installed task version and the original data conversion remain unconfirmed. The event files are identical to those in a cited AutoSci audit of version 1.0.0. A separate calculation agrees with that audit. In 241 scanner blocks, replacing only recorded zeros with planned delays reduces the mean stopping-time estimate by 33.30 ms. This assumes that zero is not a real elapsed delay. It does not establish the true stopping time. The package preserves raw data, task source, code, hashes, checks, results, and reproduction instructions.

stop-signal task · stop-signal reaction time · response inhibition · reaction time · data quality · timing fields · OpenNeuro · CNP