Table 3.

Linear mixed‐effects analyses (LMER) testing the efficacy of camouflage

Subject	Estimate	SE	df	t‐Value	p
(Intercept)a	2,338.03	73.23	436	31.92	<0.001
Crab Habitat [mussel]	−893.08	142.06	310	−6.28	<0.001
Crab Habitat [pool]	−1,078.90	65.65	4,292	−16.43	<0.001
Photo Habitat [mussel]	239.71	12.28	509,442	19.51	<0.001
Photo Habitat [pool]	727.28	11.87	510,886	61.28	<0.001
Crab [mussel] × Photo [mussel]	225.26	17.82	508,001	12.63	<0.001
Crab [pool] × Photo [mussel]	161.08	17.91	508,139	8.99	<0.001
Crab [mussel] × Photo [pool]	453.92	17.22	509,449	26.36	<0.001
Crab [pool] × Photo [pool]	109.53	17.39	509,349	6.29	<0.001

Here, under the test was how quick crabs were to find (i.e., camouflage efficacy) against background types. LMER predicts the time to find crab (i.e., latency to click) risk in relation to crab origin (“crab habitat”), background habitat displayed (“photo habitat”) and their interaction. Intercept includes game ID and crab size as random variables.

^aIntercept includes factor level: Crab [mud] and Photo [mud].