|Percentage of Dependent Variable Variance Accounted for by Independent Variable(s)|
|Test Design||Independent Variables That Account for Variance in Dependent Variable||Input Resistance||Depolarization Threshold||Rheobase||ΔI||Recruitment Current||Derecruitment Current|
|One-factor||AHP half-decay time||20.8**||40.6***||43.5***||21.8*||45.6***||47.2***|
|AHP half-decay time (unique)||9.9||17.3*||29.7**||21.4*||16.8**||18.6**|
|AHP half-decay time and RMP (common)||9.5||19.6||12.5||1.1||26.6||26.8|
Regressions of input resistance, depolarization threshold (voltage excursion from RMP to reach the action potential threshold), rheobase (current threshold for action potential initiation during 40-ms depolarizing pulse), ΔI (ramp decrecruitment − recruitment current), ramp recruitment current, and ramp derecuitment current on AHP half-decay time and/or RMP determine the variance they account for in the dependent variables. The two-factor analyses show the percentage of the dependent variable variance accounted for by the variation in: all factors together (All factors), the unique contribution of each independent variable (unique), and the variance that is common among independent variable (common; calculated as the difference between the variance accounted for by the entire model and the sum of the unique contributions of the independent variables individually).
↵* P < 0.05,
↵** P < 0.01, and
↵*** P < 0.001, variance accounted for by variable(s) significantly different from zero.