Table 2.

Overview of different behavioral indices used to describe perception performance and to quantify APC

Abbreviation	Formula	Description	Properties
NTV	NTV = arg(f = 0.75 * max_d_prime)	Number of noise dots in the mask with preserved biological motion detection.	Higher NTV reflects better performance.
		No relation between test and baseline condition (4 values per participant).
IntIdx	$$IntIdx=\text{ln}\left(\frac{NT{V}_{test}}{NT{V}_{baseline}}\right)$$	Quantifies the relationship between test and baseline condition.	No influence of motor execution on perception: IntIdx = 0
		Susceptible to dual task effects (two values per participant and patient).	Facilitatory influence of motor execution on perception: IntIdx > 0 Inhibitory influence of motor execution on perception: IntIdx < 0
APCIdx	APCIdx = IntIdxsynchronous − IntIdxasynchronous	Unifies the IntIdx for both delay conditions resulting in one value to quantify the APC that is needed for the lesion symptom mapping.	Unaffected APC: APCIdx ≥ 0
		Unaffected by dual task effects (one value per participant and patient).	Affected APC: APCIdx < 0