{HEAD ~ Another way} of querying {TAIL ~ the observer} is to employ the psychophysical methods outlined in previous sections 
of querying
{ HEAD ~ Another way } of querying { TAIL ~ the observer } is to employ the psychophysical methods outlined in previous sections
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH