The main limitation on Psionic attacks upon a non-psionic is that the psionic must have at least 100 strength points in order to affect the non-psionic. This makes perfect sense to me, and will apply to any of the attack modes.
The Psionic Blast is described as a wave of brain force, experienced like "stunning news" to the mind. The attack is a cone-shaped waive of force 1/2" diameter at its source and 2" diameter at its terminus 6" distant.
The saving throws for Psionic Blast attacks on non-psionics is as follows:
range for psionic blast:
short = 2"
medium = 4"
long = 6"
The effects table is as follows: