according to the foreknowledge of God the Father, in sanctification of the Spirit, that you may obey Jesus Christ and be sprinkled in his blood: Grace to you and peace be multiplied.
What Peter is discussing in 1 Peter 1:2 is "conditional" divine election. In conditional election, man maintains his responsibility; in fact, his responsibility is emphasized. The call in the gospel is for man to hear the gospel and respond to it (Mark 16:15-16). It is something he does of his own will and volition. He can decide to obey the gospel or he can not obey it; and, of course, he will have to take responsibility for the decision he makes.