Table 2.

Overview of the observers used in the experiments

Observer	Exp. 1	Exp. 2	Exp. 3	Exp. 4	Exp. 5	Exp. 6	Exp. 7	Exp. 8
A.H.							x
A.R.	x		x		x		x
A.V.	x	x		x
C.L.E.P.	x	x	x	x	x	x	x	x
H.H.	x	x		x	x	x
I.B.	x				x		x
J.S.B.	x	x		x		x
J.V.					x	x
L.K.	x	x		x	x	x
M.B.	x		x		x		x
M.S.							x
R.H.	x		x		x		x	x
R.P.								x
S.M.							x
S.P.							x
S.S.								x
T.V.								x
T.W.	x		x		x		x