The running stitch requires filling in the blank space in the line when the stitch is underneath, and we know that most people functioning within ACL 3.4 can do that. With colouring, they roughly colour a shape while in the centre of the shape or zig zagging across the line. With the copying activity, a few tiles will probably be placed in a row within the frame but not at the perimeter.
To Verify
The picture of stamping follows the same idea seen in the ACLS-6 activities and performance should be the same. Verification is based on information equivalence and ACL 3.4 provides a good example of different actions that process the same quality of concrete information.
Stamping in a row is easily understood as a concept of a line. Stacking blocks or linens is a vertical line. Using containers provides experiences with shapes that are enclosed to hold things.
Stitching, colouring, copying, stamping, and taking things in and out provide five different actions that use equivalent information. The verification of ACL 3.4 gains credibility and confidence when various uses of the concept of a line are used and observed. Your confidence is supported when the objects you selected are met with approval by the people in your population. By design, the materials in standardised tests are selected to appeal to most people. Verification should work out the kinks you encounter with your population as well as individual differences. You are responsible for fixing the kinks in your practice.
To Rule Out
While ACL 3.4 adjustments are made for the shape and size of the containers, the external objects are not independent of the person's actions. For the person, the object is viewed from a concrete, cause and effect perspective, limited by the effects of their own repetitive actions. Within ACL 3.6, the concept of an object classifies the separate existence of material objects.
When they are given the opportunity to do an ACL 3.6 activity and they cannot do it, this confirms they are not functioning higher than ACL 3.4.