Final answer:
The APA, BACB, and NASP are the three organizations addressing ethical issues in behavior modification, providing ethical guidelines and advocating for responsible practices.
Step-by-step explanation:
The three organizations that have addressed the ethical issues involved in the application of behavior modification are APA, BACB, and NASP. These organizations have played significant roles in providing ethical guidelines, standards for professional conduct, and advocating for responsible practices in the field of psychology and behavior analysis. For example, the American Psychological Association (APA) has developed a code of ethics that guides psychologists in various aspects of their professional lives, including research and clinical practice. The Behavior Analyst Certification Board (BACB) offers certification for behavior analysts and sets forth standards for ethical conduct to ensure that their practices benefit individuals and society. The National Association of School Psychologists (NASP) also offers a professional conduct manual that outlines ethical responsibilities for school psychologists working with students, families, and schools.