Marc J. Diener, PhD, Licensed Clinical Psychologist

Dedicated to Mental Well-being and Scientific Expertise

Dr. Marc J. Diener is a seasoned clinical psychologist and researcher with over two decades of experience in private practice, academia, and research institutions. He maintains a private practice in Cedarhurst, NY, while also serving as a Professor in the Clinical Psychology Doctoral Program at Long Island University-Post.

Compassionate & Client-Centered Therapy

At the core of Dr. Diener's practice lies his commitment to providing compassionate and individualized therapy to adults dealing with various mental health challenges. He specializes in treating:

• Depression
• Anxiety
• Relationship difficulties
• Substance use

Dr. Diener utilizes evidence-based therapies such as Cognitive Behavioral Therapy (CBT), mindfulness-based interventions, and psychodynamic approaches to empower his clients and guide them towards lasting change.

Empowering Researchers & Scholars

Beyond his clinical work, Dr. Diener shares his expertise with researchers and scholars through consultation services. His comprehensive knowledge in:

• Statistics and data analyses
• Research methods
• Writing and editing
• Selecting and implementing appropriate research methodologies

Theses services are tailored to individuals and institutions seeking to:

• Enhance the quality of their research publications
• Optimize data collection and analysis processes
• Develop strong research proposals and methodologies

Passionate Scholar & Researcher

Dr. Diener is a prolific researcher with over a decade of experience in psychotherapy and personality assessment research. He has published numerous peer-reviewed articles, book chapters, and presented his findings at numerous national and international conferences. He currently serves as a Consulting Editor for several psychology journals and contributes valuable expertise as a peer reviewer for several others.