The purpose of this research is to investigate the relationship between early intervention providers' backgrounds, and their perceptions of caregiver coaching and auditory skill development, to develop professional development programs. An explanatory sequential design was used with participants of varying backgrounds and experience. In the first phase of the study, participants responded to a survey regarding their educational background, and their comfort with caregiver coaching and auditory skill development. Survey results were analyzed using Spearman's Ranked Correlational Coefficient (Spearman's r[subscript s]) to form groups of participants from extreme cases. The second phase of the study consisted of participant interviews from each of the groups. Interviews were coded to identify themes present within and between groups. The information from both phases were analyzed to generate how professional preparation and certifications influence service delivery. Results were subsequently analyzed to determine potential improvements in the EI system, professional development, and policy. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]