(~10 minutes)

Semantic Picture Matching

This test assesses semantic knowledge independent of orthographic processing, using object pictures (Binder et al., 2016). The materials and procedure are otherwise identical to the concrete condition of the Semantic Noun Matching test. As in that test, subjects are instructed to match items based on overall feature similarity.

Materials:

• digital color photographs of objects
• 60 object picture triads; half easy and half hard; half artifacts and half living things
• On approximately half of the trials, foil items are equally or more similar in shape to the sample than is the correct item (e.g., snake > worm vs. lizard) so that correct performance cannot be achieved using a general visual shape criterion alone.

Procedure:

• patients attempt to pick the alternative that is most similar in meaning to the sample item

Data analysis:

• %correct overall and each condition; chi-square tests for category effects; mean RT by condition