Table 2.

Visual perturbations of object distance.

Condition name	No perturbation	Object size S [cm]	Object distance D [cm]	# Trials
Near	N	5.5	20	96
Near-Middle	NM	5.5	25	96
Middle	M	5.5	30	96
Middle-Far	MF	5.5	35	96
Far	F	5.5	40	96
Condition name	Perturbation	Object size S [cm]	Object distance D [cm]	Perturbation timing [ms]	# Trials
Near→Near-Middle	N→NM	5.5	20→25	100, 200, 300	16
Near→Middle	N→M	5.5	20→30	100, 200, 300	16
Near→Middle-Far	N→MF	5.5	20→35	100, 200, 300	16
Near→Far	N→F	5.5	20→40	100, 200, 300	16
Near-Middle→Middle	NM→M	5.5	25→30	100, 200, 300	16
Near-Middle→Middle-Far	NM→MF	5.5	25→35	100, 200, 300	16
Near-Middle→Far	NM→F	5.5	25→40	100, 200, 300	16
Middle→Middle-Far	M→MF	5.5	30→35	100, 200, 300	16
Middle→Far	M→F	5.5	30→40	100, 200, 300	16
Middle-Far→Far	MF→F	5.5	35→40	100, 200, 300	16