Figure 6
From: Experimental insights into cognition, motor skills, and artistic expertise in Paleolithic art
Examples of engravings made in Task 3 by expert and non-expert participants, showing common errors such as the difficulty in deepening a single groove (ID2, 24, 25, 32), snagging in curved strokes (ID4, 24, 32), and lack of incisions depth (ID15, 7, 14).
