Referring to the Sample
Copying is confounded by counting and matching one tile at a time.
Images are used to make comparisons between the sample and their copy, seen as looking back and forth.
Count the number of times the person refers to the sample during sustained attention.
If the frequency of comparisons diminishes, estimate the time when they started making fewer glances to the sample.
Tiles
Place all the tiles on the opposite side of the frame to the sample design. Do not sort colors or reduce the number of tiles provided.