In the first of these two short communications, the author points out that the various psycho-analytic assumptions about the symbolism of nodding the head as a sign of affirmation and shaking it as a sign of negation would appear to be somewhat invalidated by the fact that nodding does not everywhere mean 'yes', nor shaking 'no'. In Macedonia, for instance, the converse is true. But this difficulty can, he thinks, be got over by bringing in the principle of the 'antithetic meaning of primal gestures', in analogy with Freud's principle of the antithetic meaning of primal words, and by assuming that each opposite set of meanings belongs to a separate phase in the development of expressive movement.

In his second communication the author gives two examples to show that the unconscious of one person can directly affect the unconscious of another so as to make him commit a parapraxis.