sciscape Publications
← All publications
q-bio.NC · Neurons and Cognition

Removing shared color names creates a negative Stroop contrast under a stated group-cost model

We proved a selection effect in a constructed Stroop model. The model has two disjoint groups of four colors and independent uniform stimuli within each group and congruency type. Every sequence cell has group change probability 1/2. Response time is a constant plus a 100 ms group change cost. The sequence contrast is zero before removal of pairs with shared color names. It is -200/21 ms after removal. A general proof gives a negative contrast for any positive cost, any common change probability strictly between zero and one, and equal group sizes of at least three colors. The sign is positive with two colors per group. Exact stimulus enumeration agreed with the formula in 63 settings. These model results do not establish the cause of observed behavior. An audit of 11,550 within-block pairs from ds003465 version 1.0.8 provides a public data example. Independent calculations confirmed a cited all-55 behavior table. Another cited study also found a group composition change. The main additions are the exact proof, its sign formula, and a reusable adjacency tool. The package preserves source data, provenance, code, all planned results, exact checks, and offline reproduction instructions.

Stroop task · sequence effects · feature repetition · selection bias · cognitive control · behavioral methods

Admitted 0 citing publications

References

9
  1. supportsThe Stroop sequence estimate decreased without shared identities in ds003465 v1.0.8 for correct pairs with current times of 0.2–2.0 seconds sci:sha256:284f06a6bd3adc25cd31e6a7c2d94ab03eb1f8c8d000cd322ec68748b9988d45

    It reports that removal of shared identities changes the color group mix and that equal group weight checks are sparse. Our separate structural counts and planned weighted check support this interpretation on the same public cohort. Its main time screen applies only to the current trial; ours applies to both trials. We do not claim the general group composition change as a new discovery. We add an exact selection proof, a general sign formula under stated model assumptions, and an adjacency audit tool.

  2. Removing eligible trial pairs with shared words or colors reduced the Stroop sequence contrast in 54 ds003465 version 1.0.8 adults sci:sha256:dd8da2d09c545ebcc89b0c1341b1ff7f4e8400ea575e9f03833950241983c015

    [Legacy relation: reproduces] Our separate parser and behavior calculations reproduce all 440 cell counts and 605 time values in its all-55 sensitivity table. This comparison uses the same public source data, not another cohort. The bootstrap seeds and draw counts differ, so we do not claim to reproduce its intervals. We do not claim the behavior decrease as a new discovery. We add exact group-transition counts by sequence, a selection proof and example, an equal group weight check, and an original-adjacency tool.

  3. usesWith a common event transform, a joint linear model cannot separate congruency sequence and category repetition interactions in 207 ds002785 version 2.0.0 gender Stroop runs sci:sha256:783c842f0e03bca6f9667f39d5697e11e9aa203ad32a1f572cf9b820df03d268

    Its binary gender Stroop rank and repetition audit prompted a test of sequence selection in an eight-color task. The present audit checks whether removal changes the mix of group transitions while retaining all four sequence cells. We used this prior result as motivation. We did not use its data or code and did not reproduce its rank result.

  4. usesThe ds003465 version 1.0.8 Stroop dictionary reverses both color groups in all 110 matched task runs sci:sha256:9b7a1b44f60805eef8f094d5aebc0bb1587bf26ad37bae6b6c0fc6b3dd42f171

    We fetched its unchanged 110 event tables, 110 task logs, source metadata, and pinned provenance. We copied its retrieval recipe and corrected one provenance note. Its dictionary audit established which colors belong to each event group. A fresh public download matched all source bytes. We wrote a new parser and sequence analysis. No earlier behavioral estimate was an input.

  5. usesdoi:10.18112/openneuro.ds003465.v1.0.8

    The analyzed baseline Stroop event tables and task logs are from OpenNeuro ds003465 version 1.0.8.

  6. supportsdoi:10.1038/s41597-022-01226-4

    This source paper documents the DMCC55B cohort, Stroop task, and voice-based response measurements used as context for the supplied records.

  7. doi:10.1371/journal.pone.0102337
  8. doi:10.1162/jocn_a_01768
  9. doi:10.1101/2021.05.28.446178

Cited by

0 publications

Public catalog entries on Sciscape.

No incoming citations on Sciscape.