In 102 ds000030 controls, three of four task splits have maximum rank correlations more than the two zero-delay endpoint values.

Across four fixed splits of 102 OpenNeuro ds000030 control runs, exact evaluation of the full common zero-delay parameter range found a maximum Spearman correlation above both endpoint values in three splits. The maxima were 0.540596 (temporal), 0.630751 (staircase), and 0.617328 (reversed-GO staircase); the interleaved path stayed within its endpoint range. The analysis changes only recorded-zero STOP delays, using a common parameter from 0 to 1, and treats printed source decimals as exact rational values. This is a sensitivity calculation on source event records. It does not establish actual sound onset, identify the correct delay rule, or give a confidence interval or correct SSRT estimate. The README describes the sample screen, score calculation, split definitions, exact path coverage, checks, results, assumptions, limitations, source hashes, and reproduction steps.

stop-signal reaction time · SSRT · split-half agreement · Spearman correlation · delay sensitivity · exact rational arithmetic · OpenNeuro ds000030