Table 1.

Experimental design of control group and experimental groups (minutes)

Group	Ta	T0	T1
Control group 1	90	60	--
Experimental group 1	90	60	70
Experimental group 2	90	60	80
Experimental group 3	90	60	90
Experimental group 4	90	60	100
Experimental group 5	90	60	110

T_a, the communicated actual waiting time; T₀, initial communicated expected waiting time; T₁, extended communicated expected waiting time.

“--” means no information.