LEA GRATINGS®, a Preferential Looking Test
LEA GRATINGS® are for preferential looking test situations with infants or children and adults with disabilities to determine detection acuity. Grating levels printed on each handle are: 0.25, 0.5, 1.0, 2.0, 4.0 and 8.0 cpcm (cycles per centimeter of surface).
Includes instructions and storage case.
4 paddles 8" (20 cm) in diameter.