Manipulation Revealed: Influencing Intelligence via Priming and Placebo Effects? (Psychology)

Say "silk" ten times. Now, spell "silk." What do cows drink?
Answer: "Milk. No, wait...!"
Many people know this or similar games, but only few know the psychological effect that is responsible für our wrong answers: Priming (e.g. Hopkins et al., 1968.).
During priming neural networks are preheated without our knowing. Since some concepts in the brain are closely associated with each other, the activation of one concept (such as "silk"), prepares the activation of another one (such als "milk"). But how huge are priming effects really?
For Example: Does thinking about a professor increase your intelligence?
And: What effects can placebos have on our mental capacity?

Keywords: Priming - fluid intelligence - General Knowledge - Dijksterhuis - van Knippenberg - Trivial Pursuit - Diederik Stapel - research fraud - Social Psychology - David Shanks - replication failed - too much noise - tests too difficult - publication bias - false positives - Ulrich Weger - Steve Loughnan - Placebo Effects - (bogus) subliminal priming - Anxiety - Stress - Psychology - neuronal networks - John Bargh - unconscious - Brain - Mind Control - Derren Brown - psychological manipulation