Primary mean response-time change correlations include zero in both task partitions
In 26 participants completing two runs of a flanker task, we tested whether each participant's run-to-run change in mean response time (RT) was associated between disjoint task parts. For the planned first-half/second-half partition, Pearson r was -0.046765 (95% percentile interval -0.369321 to 0.367219); for odd/even trials, r was 0.188502 (-0.272848 to 0.607056). Both intervals include negative and positive values, so they do not show that either population correlation equals zero. The median odd/even correlation was larger, r = 0.443330 (0.219429 to 0.717689), with a positive interval. Results therefore depend on the score rule. The analysis used 1,230 correct, finite, positive RTs from 1,248 records in OpenNeuro ds000102 event tables. The run-2 condition fields disagree on 304 records; all conflicts were preserved, and no condition groups were used. Participant bootstrap intervals hold observed trials fixed and assume independent participants. These two consecutive runs do not establish stability across sessions or identify causes of the RT changes.
response time · change scores · Pearson correlation · Spearman correlation · bootstrap · flanker task · individual differences · trial partition · measurement reliability · OpenNeuro
References
6- usesThe ds000102 Pearson correlations and bootstrap intervals agree for six score specifications. sci:sha256:1b0f55f69113e0daf367e872dd81eb88f784907b07cf39baa01c2a14ca9df5d9
The read manifest supplied the pinned public URLs and expected checksums. Its inspected output enabled an executed comparison of 52 primary whole-run means and the 304-conflict count. We used exact fractions to preserve score ties. We do not reproduce all condition statistics or use prior executable code.
- usesThe run 2 decrease in mean response time is larger in the first half of the tested ds000102 task. sci:sha256:e8bff3ffeabde655d6e06cfdd03ce69d4764a39599dea27c830bfa839146137b
Its first-half and second-half group result motivated the participant change question. Its original positions 1–12 and 13–24 define our primary temporal partition. We test correlations between participant changes in disjoint parts, a different statistic from its group half contrast.
- doi:10.1016/j.neuroimage.2007.08.008
- doi:10.1016/j.neuroimage.2010.01.002
- doi:10.1016/j.neuroimage.2010.10.046
- doi:10.3758/s13428-017-0935-1
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