Cognitive Enhancement Therapy (CET) is a structured rehabilitation program designed to improve thinking skills and social functioning in adults with schizophrenia and related disorders. It combines computer-based brain training with group sessions focused on real-world social skills, typically over an 18-month course of treatment. Unlike therapies that focus on managing symptoms, CET targets the underlying cognitive difficulties that make everyday social life and work so challenging for people living with these conditions.
How CET Works
CET is built on a specific idea: that many people with schizophrenia rely on slow, effortful, step-by-step thinking to navigate situations that most adults process quickly and intuitively. Reading a room, picking up on social cues, understanding what someone means versus what they literally said. CET aims to shift thinking toward faster, more automatic processing of these social “big picture” patterns, rather than trying to consciously analyze every detail of an interaction.
The program has two distinct components that run in sequence and then overlap. The first is computer-based neurocognitive training, which targets foundational skills like attention, memory, and problem-solving. The second is a social cognition group, where participants practice real-life interpersonal skills like perspective-taking and reading social context. The logic is developmental: you build the cognitive foundation first, then layer social skills on top of it.
What the Program Looks Like
CET follows a fairly rigid structure. It begins with roughly three months of weekly one-hour computer training sessions focused on attention. During this phase, participants work individually with interactive software designed to sharpen concentration and processing speed. After that initial period, they begin attending weekly 90-minute social cognition group sessions while continuing their computer training. The two components then run side by side for the remainder of the program.
Over the full course of treatment, participants complete approximately 60 hours of computer-assisted neurocognitive training and 45 group sessions. The groups use structured exercises and in-the-moment learning experiences to build what the program’s developers call “social wisdom,” meaning the ability to understand and respond appropriately in interpersonal situations. Participants might practice appraising social contexts, taking another person’s perspective, or working through real scenarios they’ve encountered in their daily lives.
Who CET Is Designed For
CET was developed specifically for adults with schizophrenia or schizoaffective disorder who have moved past the acute phase of their illness. These are people whose major symptoms (like hallucinations or delusions) are relatively stable with treatment, but who still struggle significantly with social relationships, holding a job, or functioning independently in their communities. Symptom control alone doesn’t resolve these difficulties for many people, because the cognitive deficits that drive them are a separate dimension of the illness.
The program is considered appropriate for people who would benefit from improvements in everyday social cognition, general cognitive abilities, and community functioning. It’s not designed for people in active crisis or those who haven’t yet achieved basic symptom stability.
Evidence for Effectiveness
CET has been tested in several randomized controlled trials, and the results are notably strong for a cognitive intervention. In a major two-year trial with 121 outpatients who had been ill for an average of nearly 16 years, participants receiving CET showed large, statistically significant improvements in neurocognition, social cognition, and social adjustment compared to those receiving a supportive therapy control.
The numbers are striking. In that trial, the effect size for social cognition improvement was 1.55, and the effect size for social adjustment was 1.53. In clinical research, anything above 0.8 is considered a large effect, so these results represent substantial, meaningful change in participants’ ability to understand social situations and function in their relationships and communities. Psychiatric symptoms also improved, with a moderate effect size of 0.77.
A more recent multi-site confirmatory trial found significant effects on social cognition (effect size of 0.52) and attention (effect size of 0.46) at 18 months. These are moderate effects, smaller than the earlier trial but still meaningful, and importantly, they held up across multiple treatment sites, which strengthens confidence that the results weren’t a fluke of one particularly skilled team.
How CET Differs From Other Cognitive Therapies
Several cognitive rehabilitation approaches exist for schizophrenia, and they differ in important ways. Standard Cognitive Remediation Therapy (CRT) is typically done one-on-one, often uses paper-and-pencil tasks, and focuses on executive functions like mental flexibility, working memory, and planning. It emphasizes learning strategies and techniques for thinking more effectively, but it generally doesn’t include a social component.
CET’s distinguishing feature is that it treats cognitive training as a means to an end, not the end itself. The computer exercises build the cognitive infrastructure, but the real goal is the social cognition group work. This dual-component design sets it apart from programs that train brain function in isolation and hope the benefits transfer to real life on their own. Another approach, Integrated Psychological Therapy (IPT), also combines cognitive and social training but does so entirely in group settings and incorporates social skills training more directly. CET takes a more developmental approach, building cognitive foundations individually before transitioning to group-based social learning.
What Improvement Looks Like
The changes CET produces aren’t abstract test-score improvements. Social cognition gains translate to practical abilities: better understanding what a coworker means by a sarcastic comment, recognizing when someone is uncomfortable in a conversation, or grasping the unspoken dynamics in a family gathering. Social adjustment improvements show up as more engagement with other people, better performance in work or volunteer roles, and greater independence in daily life.
These gains take time. The program is intentionally long because the skills it targets develop gradually, much the way they develop in adolescence and early adulthood for people without these disorders. Participants typically don’t see dramatic changes in the first few months of computer training alone. The more noticeable shifts tend to emerge once the social cognition groups are well underway and participants are actively practicing new ways of engaging with the world around them.