<div style="color: #aa0000;">One issue with placing the base in the centre of the display rather than at the bottom of the display is that it could complicate the detection of brain electrical potentials: stimuli from the top half of space are processed in the inferior occipital lobe whereas stimuli from the bottom half of space are processed in the superior occipital lobe, so we will be recording voltages with grossly different scalp distributions and will be unable to average them together.  We could go this route if it distinctly improves game play, but the price that we pay for this flexibility is that we will need double the amount of game play in order to achieve sufficient numbers of trials for successful data analysis, since we'll have to analyse targets in the upper and lower visual fields separately.</div>
 
<div style="color: #aa0000;">One issue with placing the base in the centre of the display rather than at the bottom of the display is that it could complicate the detection of brain electrical potentials: stimuli from the top half of space are processed in the inferior occipital lobe whereas stimuli from the bottom half of space are processed in the superior occipital lobe, so we will be recording voltages with grossly different scalp distributions and will be unable to average them together.  We could go this route if it distinctly improves game play, but the price that we pay for this flexibility is that we will need double the amount of game play in order to achieve sufficient numbers of trials for successful data analysis, since we'll have to analyse targets in the upper and lower visual fields separately.</div>