Table 1.

Open field test settings in the participating centers

	CNR	GSF	ICS	MRC
Open field dimensions, cm	55 × 32 × 28	48.5 × 48.5 × 38	45 × 45 × 18	26 × 26 × 37
Periphery, cm	8	8	8	6.35
Central zone, %	36	45	40	26
Light intensity, Lux	120	180–190	150	190–200
Detector system brand	Video-tracking Viewpoint	I.R. sensors Panlab	I.R. sensors Panlab	I.R. sensors Tru-Scan, Coulbourn

CNR, Consiglio Nazionale delle Ricerche; GSF, ; ICS, Institut Charles Sadron; MRC, Medical Research Council.