"It uses your base attack bonus (possibly allowing it multiple attacks per round in subsequent rounds) plus your Wisdom modifier as its attack bonus. It strikes as a spell, not as a weapon, so for example, it can damage creatures that have damage reduction. As a force effect, it can strike incorporeal creatures without the reduction in damage associated with incorporeality."
So if it is striking as a spell based force effect... touch attack?
"Strikes as a spell" means "ignores DR".
"As a force effect" means exactly what it says, "hurts incoporeal".
I am having real trouble taking those two statements and getting "touch attack" out of them. When a spell is a touch or ranged touch attack, it says so.