Results IVA shows no difference between learning disabled & normal controls No effect of NF. Measuring Independent Attention Networks in the Two Hemispheres Deanna J. Greene 1 , Anat Barnea 2, , Amir Raz 3 , & Eran Zaidel 1
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IVA shows no difference between learning disabled & normal controls
No effect of NF
Independence: within each hemisphere
Orienting Cost: OC = Invalid cues minus Center cues
• Presented tachistoscopically for 170ms to the left visual field (LVF) or right visual field (RVF)
• Target: middle arrow pointing up/down. (see figure)
• Flanker arrows: Congruent= same direction as target
Incongruent= opposite direction as target
Neutral= straight lines
‘+’ = independent ‘-’ = not independent
Estimates of attention networks
Version 2 (small target, rare invalid cues) yields the best estimates of attention networks, demonstrates the most independence among networks, and demonstrates the most independence for each network between hemispheres.
2.Orienting Cost and Conflict, though both inhibitory, are independent of each other, indicating that they operate under different mechanisms.
3. This version of the LANT is useful for profiling populations with attention deficits and abnormal cerebral asymmetry.
Congruent flankers Incongruent flankers Neutral flankers
in RVF in LVF in LVF
• Target preceded by 1 of 5 possible cues:
Center= asterisk at central fixation
Double= asterisk on both sides of central fixation
Valid= asterisk on the side in which the target will appear
Invalid= asterisk on the opposite side of where target will appear
Center cue Double cue Valid/ Invalid cue
Contact: Deanna J. Greene [email protected]