highly significantP < 10 −3
The choice difference between the two conditions (i.e., black versus white wall) was highly significant (χ 2 > 44.36, df = 1, and P < 10 −3 for each of the three light levels, chi-square test for independence).
The choice difference between the two conditions (i.e., black versus white wall) was highly significant (χ 2 > 44.36, df = 1, and P < 10 −3 for each of the three light levels, chi-square test for independence).
Three bats performed well above chance ( P < 0.01 for each of the three, one-tailed binomial test), and one bat showed a trend but did not reach significance ( P = 0.057).