This is display behavior that certain animal species use to attract a mate for reproduction.

the transfer for conduction is the heat transfering from the liquid to the spoon

the transfer for convection is the heat rising from the liquid to the air

the transfer for radiation is the heat going through the sides of the cup and to the air

at least that is what i would do

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.