A sample size of thirty subjects will be selected based on the model used by Carter-Hanson et al 1996. Prior to commencement of the actual study, each volunteer will receive written and verbal instructions on the two techniques. The principal and third investigator will demonstrate to the volunteers both techniques on models, for half hour counseling session, for three consecutive days. Each counseling session will not have more than 10 participants. On the third day the volunteer's proficiency on models in both techniques will be confirmed by both demonstrators separately, informed consent will be taken and the volunteer will be enrolled as subject into the fourteen week, 2-phase crossover, single (examiner) blind study protocol with washout in-between phases. Failure by the volunteer to perform the techniques as instructed will result in another counseling session of half hour or he/she will not be included in the study protocol.