Table 1. Likelihood of experiencing piloerection according to prior exposure and whether video had a twist ending.

	Likelihood of piloerection if			Likelihood of piloerection if video
	video was previously unseen			has a twist ending
	(R2 = .05)			(R2 = .04)
Video	Odds Ratio	p	sr2	Log-odds	p	sr2
Avengers: Endgame	.265	.046	.01	.927	.932	< .01
Dear Brother	.498	.137	< .01	.502	.118	< .01
Thank you, Mom	1.738	.212	< .01	5.137	.034	< .01
Ripple	1.241	.635	< .01	2.070	.069	< .01
Sandy Hook Promise	.239	.008	.02	.353	.019	0.01
Shallow	1.661	.357	< 01	.257	.374	< .01
10-year-old singer	1.751	.204	< .01	2.259	.127	< .01

Note: Familiarity and non-twist endings were the reference conditions

sr² indicates semi-partial r².