Evidence-Based OCD Therapy

Evidence-Based OCD Treatment Using Inference-Based Cognitive Behavioral Therapy (I-CBT)

At Sommer Psychology Group, we provide evidence-based treatment for OCD using Inference-Based Cognitive Behavioral Therapy (I-CBT) for adolescents, young adults, and adults in Indianapolis. I-CBT is a specialized therapy designed specifically for obsessive-compulsive disorder that helps individuals break free from obsessional doubt, fear-based reasoning, and compulsive patterns.

We offer in-person OCD therapy in Indianapolis and secure online therapy across Indiana, providing flexible and compassionate care that fits your life.

Does this sound like you?
Inference-Based Cognitive Behavioral Therapy (I-CBT) can help.

What Is Inference-Based Cognitive Behavioral Therapy (I-CBT)?

Inference-Based Cognitive Behavioral Therapy (I-CBT) is an evidence-based treatment developed specifically for OCD and related disorders. Rather than focusing primarily on exposures, I-CBT helps individuals understand how OCD creates doubt through imagined possibilities and faulty reasoning patterns.

Many people with OCD become stuck in “what if” thinking:

I-CBT helps you recognize when OCD pulls you away from reality and into imagined scenarios that feel possible but are not grounded in your actual senses or present experience. Treatment focuses on rebuilding trust in yourself, your reasoning, and your ability to live outside the OCD “story.”

Inference-Based CBT in Indianapolis

How I-CBT Helps Treat OCD

I-CBT helps individuals:

Unlike traditional approaches that focus heavily on habituation through exposure exercises, I-CBT targets the reasoning process that creates obsessive doubt in the first place.

Man speaking with therapist during counseling session about anxiety symptoms.
What We Treat Using I-CBT

Contamination OCD is a subtype of obsessive-compulsive disorder characterized by persistent fears about germs, illness, bodily fluids, chemicals, dirt, or spreading contamination to oneself or others. Individuals with contamination OCD may experience intrusive thoughts and intense doubt about whether something feels “clean enough” or safe, even when there is little or no actual danger present.

Many people with contamination OCD engage in compulsions such as excessive handwashing, cleaning, disinfecting, changing clothes, avoiding certain people or places, mentally reviewing events, or seeking reassurance from others. These rituals often become time-consuming, emotionally exhausting, and disruptive to daily life and relationships.

Inference-Based Cognitive Behavioral Therapy (I-CBT) is an evidence-based treatment developed specifically for OCD that focuses on the reasoning process behind obsessional doubt and imagined possibilities that fuel contamination fears.

Harm OCD is a subtype of obsessive-compulsive disorder characterized by intrusive, unwanted thoughts, images, or urges about causing harm to oneself or others. These thoughts are distressing and often feel completely inconsistent with the person’s actual values, intentions, and character. Individuals with Harm OCD may fear losing control, becoming violent, making a terrible mistake, or accidentally hurting someone without realizing it.

Common compulsions can include excessive checking, reassurance seeking, avoiding certain people or objects, mentally reviewing past actions, monitoring thoughts or emotions, or repeatedly trying to “prove” to themselves that they would never act on the thought. Many individuals with Harm OCD experience intense guilt, shame, fear, and self-doubt, even though they have no desire to cause harm.

Inference-Based Cognitive Behavioral Therapy (I-CBT) is an evidence-based treatment developed specifically for OCD that focuses on the obsessional doubt, imagined possibilities, and faulty reasoning processes that fuel harm-related fears.

Relationship OCD (ROCD) is a subtype of obsessive-compulsive disorder characterized by persistent doubt, fear, and uncertainty surrounding romantic relationships. Individuals with ROCD often experience intrusive thoughts about whether they truly love their partner, whether their relationship is “right,” whether their partner loves them enough, or whether they may be making the wrong relationship decision.

These doubts can become overwhelming and difficult to shut off, even in healthy and meaningful relationships. Many individuals with ROCD constantly analyze their feelings, compare their relationship to others, seek reassurance, mentally review interactions, check for certainty, or focus intensely on perceived flaws in themselves or their partner. The cycle of overthinking and compulsive reassurance seeking can create significant anxiety, emotional distress, and strain within relationships.

Inference-Based Cognitive Behavioral Therapy (I-CBT) is an evidence-based treatment developed specifically for OCD that focuses on the obsessional doubt, imagined possibilities, and faulty reasoning processes that fuel relationship-related fears and uncertainty.

Sexual Orientation OCD (SO-OCD) is a subtype of obsessive-compulsive disorder characterized by persistent doubt, fear, and uncertainty about one’s sexual orientation. Individuals with SO-OCD experience intrusive, unwanted thoughts and fears that create significant anxiety and confusion, often despite having a previously stable sense of identity or attraction.

Many people with SO-OCD become trapped in cycles of overanalyzing thoughts, emotions, physical sensations, memories, or interactions in an attempt to gain certainty about their sexuality. Common compulsions may include mentally reviewing past experiences, checking for attraction or arousal, comparing oneself to others, seeking reassurance online or from loved ones, avoiding certain people or situations, or repeatedly questioning “what if” scenarios. These fears can become emotionally exhausting and deeply distressing, often leading to shame, self-doubt, and isolation.

Inference-Based Cognitive Behavioral Therapy (I-CBT) is an evidence-based treatment developed specifically for OCD that focuses on the obsessional doubt, imagined possibilities, and faulty reasoning processes that fuel sexuality-related fears and uncertainty.

Existential OCD is a subtype of obsessive-compulsive disorder characterized by persistent, intrusive thoughts about life, existence, reality, consciousness, free will, or the meaning of the universe. Individuals with Existential OCD often become trapped in repetitive questioning and mental overanalysis surrounding topics that cannot be answered with complete certainty.

Common obsessions may involve fears or doubts such as “What if nothing is real?”, “What is the meaning of life?”, “How do I know I truly exist?”, or “What happens after death?” While many people occasionally think about philosophical questions, individuals with Existential OCD experience these thoughts as distressing, consuming, and difficult to stop. Many engage in compulsions such as excessive researching, mentally debating questions, seeking reassurance, checking for certainty, or avoiding triggers that bring up existential fears.

Inference-Based Cognitive Behavioral Therapy (I-CBT) is an evidence-based treatment developed specifically for OCD that focuses on the obsessional doubt, imagined possibilities, and faulty reasoning processes that fuel existential fears and uncertainty.

Religious or Moral Scrupulosity is a subtype of obsessive-compulsive disorder characterized by persistent fears about being immoral, sinful, dishonest, offensive, or spiritually “wrong.” Individuals with scrupulosity often experience intrusive thoughts and excessive doubt related to religion, morality, guilt, responsibility, or personal values, leading them to constantly question whether they have done something bad or failed to meet their own ethical or spiritual standards.

Common compulsions may include excessive praying, confessing, seeking reassurance, mentally reviewing past actions, researching religious or moral rules, avoiding situations that trigger guilt, or repeatedly trying to gain certainty that one is a “good” person. Many individuals with scrupulosity experience intense shame, fear of punishment, fear of offending God or others, and ongoing self-doubt, even when they are deeply thoughtful, compassionate, and conscientious people.

Inference-Based Cognitive Behavioral Therapy (I-CBT) is an evidence-based treatment developed specifically for OCD that focuses on the obsessional doubt, imagined possibilities, and faulty reasoning processes that fuel religious and moral fears.

Health Anxiety and Illness OCD is a subtype of obsessive-compulsive disorder characterized by persistent fears about having, developing, or spreading a serious illness or medical condition. Individuals with Health Anxiety or Illness OCD often become highly focused on bodily sensations, physical symptoms, medical information, or perceived changes in their health, leading to ongoing fear, uncertainty, and self-doubt.

Common compulsions may include repeatedly checking the body for symptoms, researching illnesses online, seeking reassurance from doctors or loved ones, monitoring physical sensations, avoiding perceived health risks, or mentally reviewing past exposures and medical concerns. Even minor or normal bodily sensations can become overwhelming when filtered through OCD-related doubt and catastrophic thinking. Many individuals feel trapped in cycles of fear and reassurance seeking that temporarily reduce anxiety but ultimately reinforce the obsession.

Inference-Based Cognitive Behavioral Therapy (I-CBT) is an evidence-based treatment developed specifically for OCD that focuses on the obsessional doubt, imagined possibilities, and faulty reasoning processes that fuel health-related fears and uncertainty.

Checking OCD is a subtype of obsessive-compulsive disorder characterized by persistent doubt and fear about making mistakes, causing harm, forgetting important tasks, or failing to prevent something bad from happening. Individuals with Checking OCD often feel an intense need to repeatedly check things in an attempt to gain certainty, reduce anxiety, or prevent feared consequences.

Common compulsions may include repeatedly checking doors, locks, appliances, alarms, emails, assignments, or personal belongings, as well as mentally reviewing past actions to make sure nothing was missed. Many individuals fear being responsible for harm, accidents, fires, break-ins, or other catastrophic outcomes if they do not check “enough.” Even after checking, the doubt often quickly returns, creating a repetitive and exhausting cycle of uncertainty and reassurance seeking.

Inference-Based Cognitive Behavioral Therapy (I-CBT) is an evidence-based treatment developed specifically for OCD that focuses on the obsessional doubt, imagined possibilities, and faulty reasoning processes that fuel checking behaviors and fear-based uncertainty.

“Just Right” OCD is a subtype of obsessive-compulsive disorder characterized by persistent feelings that something is incomplete, uneven, uncomfortable, or not “right enough.” Rather than being driven primarily by fear of danger or harm, individuals with “Just Right” OCD often experience intense internal discomfort, tension, or uneasiness until things feel correct, balanced, or exact.

Common compulsions may include repeating actions, arranging or organizing items, rereading, rewriting, tapping, adjusting clothing or body position, or restarting tasks until they feel “right.” Many individuals become trapped in cycles of perfectionism, overcorrection, and mental checking, spending significant amounts of time trying to relieve the uncomfortable feeling of incompleteness or internal imbalance. These symptoms can interfere with daily functioning, productivity, relationships, and overall quality of life.

Inference-Based Cognitive Behavioral Therapy (I-CBT) is an evidence-based treatment developed specifically for OCD that focuses on the obsessional doubt, imagined possibilities, and faulty reasoning processes that fuel the need for certainty, exactness, and things feeling “just right.”

Perfectionism is characterized by persistent pressure to meet unrealistically high standards, avoid mistakes, and maintain a sense of certainty, control, or flawlessness. Individuals struggling with perfectionism often become highly self-critical and may tie their self-worth to performance, achievement, productivity, or the approval of others.

Many people with perfectionism experience intense fear of failure, disappointing others, making the “wrong” decision, or not doing something well enough. Common patterns can include overthinking, procrastination, excessive checking, reassurance seeking, difficulty completing tasks, avoiding situations where mistakes are possible, or repeatedly revising work in an attempt to make it perfect. Over time, perfectionism can contribute to anxiety, burnout, low self-esteem, and difficulty feeling satisfied or present in daily life.

Inference-Based Cognitive Behavioral Therapy (I-CBT) is an evidence-based treatment approach that focuses on the doubt, imagined possibilities, and faulty reasoning processes that can fuel perfectionistic thinking, self-criticism, and chronic fear of making mistakes.

Intrusive thoughts are unwanted, distressing thoughts, images, urges, or mental “what if” scenarios that suddenly enter a person’s mind and create anxiety, fear, guilt, or discomfort. These thoughts are often repetitive and feel difficult to ignore, even when they are completely inconsistent with the person’s actual values, intentions, or character.

Intrusive thoughts can center around many themes, including harm, contamination, sexuality, religion, relationships, morality, health, or losing control. Many individuals become trapped in cycles of overanalyzing the thought, trying to gain certainty, mentally reviewing events, avoiding triggers, or seeking reassurance in an attempt to feel safe or “prove” the thought does not mean something about them. The more attention and importance given to the thought, the more persistent and distressing it can become.

Inference-Based Cognitive Behavioral Therapy (I-CBT) is an evidence-based treatment developed specifically for OCD that focuses on the obsessional doubt, imagined possibilities, and faulty reasoning processes that cause intrusive thoughts to feel dangerous, meaningful, or personally significant.

Body Dysmorphic Disorder (BDD) is a mental health condition characterized by persistent preoccupation with perceived flaws or defects in one’s appearance that are often minor or not noticeable to others. Individuals with BDD may become intensely focused on specific body parts, facial features, skin, hair, weight, or overall appearance, leading to significant anxiety, shame, and self-consciousness.

Many individuals with BDD spend excessive amounts of time checking mirrors, comparing themselves to others, seeking reassurance, hiding perceived flaws, mentally reviewing their appearance, or avoiding social situations due to fear of judgment or rejection. These obsessive thoughts and compulsive behaviors can become emotionally exhausting and significantly interfere with relationships, work, school, and daily functioning.

Inference-Based Cognitive Behavioral Therapy (I-CBT) is an evidence-based treatment approach that focuses on the obsessional doubt, imagined possibilities, and faulty reasoning processes that fuel appearance-related fears, self-doubt, and distorted beliefs about perceived flaws.

Mandy Enstrom profile picture
Mandy Enstrom
6 months ago
Our family is beyond grateful for the Sommer Psychology Group. The staff are incredibly responsive, reliable, and compassionate. Their care for adolescents and college-age adults is unmatched. We have in the past and will continue to recommend them to families looking for resources and guidance.
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Kyle Fouch
6 months ago
As a medical provider of mental health services, Sommer Psychology Group shines as a leader in providing thorough care and support for those struggling with mental illness. We share many patients through referrals, both given and received. Their ability to collaborate is a testament to their care for patient outcomes and support. I recommend Sommer's as a medical professional looking for a supportive practice for your patients.
Linda Lewis profile picture
Linda Lewis
7 months ago
Leslie Sommer was a trusted therapist for my daughter during her teenage years. She helped her achieve her goals and reflect on what kind of choices she wanted to be making with her life. Leslie supported her in navigating the ups and downs of evolving friendships, family tensions, and adolescence in general. My daughter looked forward to her appointments. I couldn't recommend her more.
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Makiya stewart
7 months ago
I worked with Leslie as my therapist for several years addressing concerns such as generalized anxiety, social anxiety, complex trauma, and adhd. I cannot recommend her services enough! Her trauma-informed, supportive approach improved my wellbeing drastically.
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Teryn McGlothlin
7 months ago
I am proud to refer clients to Leslie and her team at Sommer Psychology Group, LLC, as their approach is grounded in real-world resilience and a deep-rooted commitment to healing. Leslie brings a unique perspective to her leadership that can only come from someone who truly understands the journey of growth from the inside out. Her practice is a vital resource, and the quality of care provided here is second to none.
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John Soots
8 months ago
Leslie made a meaningful difference in our daughter’s life at a time when she truly needed support. She was a reassuring presence and helped our daughter navigate difficult moments with more confidence. We are grateful for the work and care she provided!
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Lana Beck-Cruce
8 months ago
I cannot recommend Leslie enough as a therapist, particularly for teenagers and young adults. She has a calm, caring, direct demeanor that worked so well for my child, and her professionalism and communication are excellent. She is goal-oriented and works with her clients to make a plan for success that works for them. I have nothing but wonderful things to say!
Sam Richardson profile picture
Sam Richardson
8 months ago
Leslie and her team are equal parts caring and professional. SPG therapist's are knowledgeable, caring, warm, and helpful. I would recommend Leslie or any member of her team to anyone seeking help with Anxiety, OCD, or ADHD.
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Seja Brumley
10 months ago
Leslie was a nourishing source of support for our teenage daughter. She provided gentle and supportive care to our daughter, while also providing clear tools and methods for her to utilize on her own if going through a hard moment. Leslie would bring my husband and I in regularly to update us on how our daughter was doing and check in with us as well. We are so grateful for Leslie and the care and support that she provided to our whole family.
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Gergana May
10 months ago
I have only praise for Leslie! As my child’s therapist for two years, she distinguished herself in many different ways. I reached out to her in a moment of dire need, and she acted quickly and efficiently. Her steady professionalism, positive attitude, calming approach, patience and enthusiasm were of utmost importance to me as a parent. In addition, there was excellent communication – she goes out of her way to return emails and calls promptly. I loved her constructive and practical attitude. She is a real problem-solver.
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Christopher Enstrom
11 months ago
Leslie has been wonderful to work with. She provided clear guidance, information, and support when our family needed it most, and she always does so with both professionalism and genuine care. She communicates appropriately and respectfully, honoring privacy boundaries while still helping ensure everyone involved feels supported. It’s incredibly reassuring to know she brings such empathy and expertise to her clients.

I-CBT vs ERP Therapy

Exposure and Response Prevention (ERP) is often considered the gold standard treatment for OCD and can be highly effective for many individuals. However, some people feel overwhelmed by exposure-based approaches or find that their OCD is especially rooted in obsessional doubt, overthinking, and imagined possibilities.

I-CBT offers a different pathway by helping you understand how OCD reasoning develops and why certain doubts feel so convincing. Many individuals appreciate the collaborative, insight-oriented nature of I-CBT while still working toward reduced compulsions and greater freedom from OCD.

Our Approach

Our Approach to OCD Treatment

At Sommer Psychology Group, we tailor treatment to your specific symptoms, experiences, and goals. 

Depending on your needs, therapy may integrate:

Our goal is to help you better understand your OCD, reduce compulsive behaviors, and regain confidence in yourself and your daily life.

ABOUT US

Why Work With Sommer Psychology Group

We understand that life can sometimes feel overwhelming—whether it’s managing anxiety, balancing responsibilities, or facing the fear of the unknown. As I-CBT specialists who work with individuals who struggle with anxiety, OCD, and related disorders, we aim to help you find your way forward.

Our approach is solutions-focused and evidence-based, designed to meet your unique needs and help you achieve lasting change. Whether you’re dealing with stress, life transitions, or relationship challenges, we are dedicated to giving you the tools to overcome obstacles and thrive.

At Sommer Psychology Group, we believe in the power of quality care. That means giving you dedicated, thoughtful, and individualized support, with the flexibility of virtual sessions that fit into your life, wherever you are.

Our evidence-based therapy is grounded in three core principles:

Integrity

We believe integrity is the foundation of effective therapy. It fosters trust, respect, and accountability, ensuring our clients receive honest, consistent, and ethical guidance throughout their journey.

Compassion

Compassion is at the heart of our practice. It nurtures emotional healing, creating a safe space where clients can feel heard, valued, and understood while developing a culture of collaboration and respect.

Quality Care

We prioritize quality care to ensure the best outcomes for our clients. By addressing both clinical needs and emotional well-being, we build trust and deliver effective therapy that supports long-term growth and success.

Meet Our I-CBT Therapists

At Sommer Psychology Group, our clinicians provide Inference-Based Cognitive Behavioral Therapy (CBT) to support individuals experiencing anxiety, OCD, and related disorder challenges. We focus on comprehensive, personalized care that includes assessment, treatment, and practical skill-building to help you better understand your thoughts, manage emotions, and change unhelpful patterns. 

Inference-Based Cognitive Behavioral Therapy in indianapolis

Questions About I-CBT

Yes. Inference-Based Cognitive Behavioral Therapy (I-CBT) is an evidence-based treatment developed specifically for OCD. While symptoms may not disappear completely, I-CBT helps individuals understand and change the obsessional doubt, faulty reasoning patterns, and imagined possibilities that maintain OCD. This process helps people gain better control over intrusive thoughts and compulsive behaviors, reduce anxiety and self-doubt, and improve overall quality of life.

Inference-Based Cognitive Behavioral Therapy (I-CBT) helps individuals recognize how anxiety and OCD-related doubt pull them into “what if” thinking and imagined fears. Treatment focuses on changing the faulty reasoning patterns that maintain anxiety, helping individuals reduce overthinking, compulsions, and avoidance while rebuilding trust in themselves and their ability to tolerate uncertainty.

OCD is believed to develop from a combination of biological, psychological, and environmental factors that contribute to intrusive thoughts, intense doubt, and compulsive behaviors. Over time, compulsions like checking, reassurance seeking, and avoidance reinforce the cycle of anxiety and uncertainty.
 

Inference-Based Cognitive Behavioral Therapy (I-CBT) addresses OCD by targeting the obsessional doubt and faulty reasoning processes that fuel fear and compulsions, helping individuals step out of imagined “what if” scenarios and reconnect with reality-based information.

Individuals with OCD often become trapped in cycles of obsessional doubt, overthinking, and “what if” scenarios that feel emotionally convincing and difficult to let go of. Trying to simply “relax” or think your way out of anxiety often leads to more mental reviewing, reassurance seeking, and self-doubt, which can unintentionally reinforce the OCD cycle.

Inference-Based Cognitive Behavioral Therapy (I-CBT) helps individuals understand the faulty reasoning processes that fuel OCD so they can respond differently to intrusive fears and uncertainty rather than getting pulled deeper into them.

Many individuals begin noticing improvements within a few weeks of consistently practicing I-CBT skills. Meaningful progress often develops over several months, depending on symptom severity, treatment consistency, and active participation in therapy. Regular practice outside of sessions can help strengthen long-term progress and reduce OCD-related anxiety and compulsions.

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I-CBT For OCD in indianapolis

Sommer Psychology Group

Freedom from anxiety is possible with the right support.

Licensed Provider in the State of Indiana