Quote:
Originally Posted by mr ploppy
Both "cause" and "influence" would fit within the context of that sentence 
Coins caused the barman to notice him, Coins influenced the barman's decision to serve him. |
He said if it's a verb... And in your quoted examples caused and influenced are verbs.
In the case of 'the same effect', effect is a noun. You could say 'the green effect' or 'the hot effect', that is you can use an adjective with a noun.
With a verb you can't say 'this will green affect you' or 'this will green effect your required result'.
Actually effect as a verb is rare enough that you can probably get by 99% of the time by saying use 'effect' if it's a noun and 'affect' if it's a verb. You'll probably feel more comfortable with something other than effect as a verb in the 1% of cases anyway.