See files for information on participants, hypotheses, and materials.
**Interim analysis (t = .5, N = 401)**
"Corruption allegations": Endorsement M = 4.87, SD = 1.06
"Conspiracy theories": Endorsement M = 4.83, SD = 1.04
t(399) = .326, p = .744 (two-tailed; retain null hypothesis, as this is above budgeted alpha value of .00305)
Cohen's *d* = .04, 95% CI [-.16, .23]
NB: some evidence of negative skew; Kolmogorov-Smirnov test of normality indicates violations of normality assumption in both conditions. Alternate Mann-Whitney U test also shows no significant effect, U = 19248.50, z = -.735, p = .462 (two-tailed). However, t-test is preferred given the large sample size and histogram.
**Final analysis (t = 1, N = 802)**
"Corruption allegations": Endorsement M = 4.89, SD = 1.07
"Conspiracy theories": Endorsement M = 4.81, SD = 1.10
t(800) = 1.01, p = .311 (two-tailed; retain null hypothesis, as this is above budgeted alpha value of .04795)
Cohen's *d* = .07, 95% CI [-.07, .21]
NB: some evidence of negative skew; Kolmogorov-Smirnov test of normality indicates violations of normality assumption in both conditions. Alternate Mann-Whitney U test also shows no significant effect, U = 76722.50, z = -1.12, p = .262 (two-tailed). However, t-test is preferred given the large sample size and histogram.
