Table 3.

Significance of the reduction in day 1 post-exposure latencies for experiments 4, 5, 6a and 6b. (The labelling code used in the ‘description’ column is as follows. Mu (light colour, intensity, no. of days in experiment): Mu, mu-metal box; B, blue light; UVA, ultraviolet A light; D, dark; Ø, no light. n.s., not significant at p<0.05.)

exp no. (figure no.)	description	mean latencies (±s.e.m.) on day 1		statistical significance (p-value)
		pre-exposure	post-exposure
exp 4 (figure 6)	Mu(D,Ø,5d)	16.20±0.69	13.45±0.93	0.006
	Mu(B,51%,5d)	15.05±0.88	13.65±0.94	0.165 (n.s.)
	Mu(B,106%,5d)	16.20±0.85	11.15±0.83	<0.000
	Mu(B,251%,5d)	15.40±0.63	13.30±0.86	0.017
	Mu(UVA,103%,5d)	15.90±0.72	11.95±0.58	<0.000
exp 5 (figure 7)	Mu(D,Ø,5d)	17.00±0.56	14.50±0.84	0.006
	Mu(B,6.2%,5d)	16.83±0.73	13.73±0.96	0.005
	Mu(B,12.5%,5d)	16.60±0.55	13.50±0.79	0.001
	Mu(B,25.2%,5d)	16.87±0.79	14.00±0.89	0.007
exp 6a (figure 8a)	Mu(D,Ø,5d)	15.03±0.66	12.47±0.89	0.002
	Mu(B,6.2%,5d)	15.57±0.68	12.50±0.59	0.003
	Mu(B,9.3%,5d)	15.90±0.62	13.20±0.78	0.002
	Mu(B,12.5%,5d)	15.63±0.64	13.37±0.76	0.019
exp 6b (figure 8b)	Mu(D,Ø,10d)	15.67±0.63	12.27±0.79	0.001
	Mu(B,6.2%,10d)	15.27±0.62	13.70±0.98	0.186 (n.s.)
	Mu(B,9.3%,10d)	16.90±0.60	14.60±1.09	0.016
	Mu(B,12.5%,10d)	16.33±0.53	12.50±0.80	<0.000