They either see spirit within their minds eye, (Clairvoyance), they hear spirit speaking to them (Clairaudience) or they sense spirit around them, (Clairsentience).
कुनै मानिसको भूत वायवी हुन्छ जसलाई देख्न सकिन्छ र कहिलेकाहिं कुनै बिशेष चाल या कुरा सुन्न सकिन्छ।