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