Answer: Quite frankly, none. Do you wonder at that? Let me tell you why you shouldn’t. To compare Christian counseling with other forms of counseling is to compare oranges to apples (no, let’s say, oranges and socks!). Consider the goal of Christian counseling over against that of others. Most counseling seeks to solve a person’s problem in order to bring relief. That is the prime goal. In Christian counseling, however, the goal is to honor and glorify God, whether or not relief is obtained. How, then, do you compare the outcomes?
Moreover, since the object of biblical counseling is to bring about change in the counselee that honors God, how would you test for that empirically? Would you put his soul in a test tube, shake it up and hope it turns blue? How would you test whether God was honored, whether the motives of the counselee were sound (since God looks upon the heart; not merely on outward behavior) or whether he only made changes outwardly? How would you determine the extent of the Holy Spirit’s work in the counselee’s life so as to make the desired spiritual changes? In other words, there is no way to obtain empirical evidence. Since it is biblical attainments that are under consideration, it is impossible to get statistical evidence for the spiritual changes that the biblical counselor seeks to bring about.
Then, further, why would we need any tests anyway? The One Who tries the hearts of men is the Lord. He infallibly knows what is happening within the person. We can look only at his outward behavior and listen to his speech. It is He Who tests; and that is all that counts. Besides, from the counselor’s perspective, success is measured not by the outcome of the counseling sessions but ultimately by whether the counselor did those things that were biblical, thereby honoring his Lord. Success may be measured in many ways; Christians should measure it in terms of how well the counselor followed the Bible in a given case. And once again, there is no way to test this except by comparing what he does with what the Scriptures require of him.
So, what does the Christian counselor have to demonstrate the effectiveness of Nouthetic counseling? Nothing, as I said before. And he is absolutely content to say so. He must do as well as he can to meet biblical requirements in order to please God, and then let the chips fall where they may. He knows that his performance as a counselor will be flawed since he is not perfect. But he also knows that when he asks for forgiveness for failure God measures his success by that as well as by the performance. So, given the goals, given the persons at work (the counselor and the Holy Spirit) and given the kinds of outcomes that are expected and achieved in the sight of God, it would be not only foolish but arrogant to attempt to test Nouthetic counseling by some human apparatus. We do not have to set results of the sort that they might wish before the world, so long as we honor and please God. On Judgment Day, He will reveal the statistics! Any counseling claiming to be “Christian” that makes much of statistics thereby invalidates itself as such by showing that its goals and outcomes are not thought of in biblical terms.
Since the human counselor is not the only one who is at work in Christian counseling, the Christian has an “unfair advantage” over other counselors. With the Holy Spirit enlightening the minds of counselees and enabling them to overcome sinful propensities that hinder growth, producing His fruit through His inerrant Word, what profit would there be in trying to determine how well a human counselor counsels? In effect, he is but a catalyst, ministering the Scriptures in ways that the Spirit utilizes to bring about change in counselees. The Spirit is the ultimate Counselor. The whole concept of empirical evidence, statistics and the like, begs the question. And the thought of attempting to obtain them is repugnant. Sorry, but that is how it is.