Table 1_When suppressor effects may reflect multicollinearity artifacts: a cautionary tale from multiple object tracking and clay pigeon shooting performance.docx

Zero-order and partial correlations, hierarchical regression, LOOCV, VIF diagnostics, and power analysis were computed. Two specifications were compared: Specification A (age + training years, multicollinear) and Specification B (age only, VIF < 2.5).</p>Results<p>Age and training years were near-perfectly correlated (r = 0.928).

Under Specification A r=0.928;VIF=11.7, MOT-5 and MOT-6 appeared as nominally significant partial correlates (r_partial ≈ 0.49, p < 0.03, uncorrected), a classical suppression pattern. Under Specification B, these effects attenuated to non-significance (p > 0.13). The training coefficient reversed sign (B = −2.12 despite r = +0.65), consistent with multicollinearity distortion.