Two notions of autonomy are distinguished. The respective denials that psyc
hology is autonomous from neurobiology are neuron doctrines, moderate and r
adical. According to the moderate neuron doctrine, interdisciplinary intera
ction need not aim at reduction. It is proposed that it is more plausible t
hat there is slippage from the moderate to the radical neuron doctrine than
that there is confusion between the radical neuron doctrine and, the trivi
al version.