NCT05731414

Brief Summary

It is currently unknown what factors predict response to Cognitive Behavioural Therapy for Psychosis (CBTp) or Cognitive Remediation Therapy (CR) among individuals with schizophrenia-spectrum disorders, thus the current trial will examine predictors of response to determine who requires the combined intervention and who might respond sufficiently to either monotherapy.

Trial Health

77
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
360

participants targeted

Target at P75+ for not_applicable schizophrenia

Timeline
9mo left

Started Mar 2023

Typical duration for not_applicable schizophrenia

Geographic Reach
1 country

2 active sites

Status
recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Progress81%
Mar 2023Jan 2027

First Submitted

Initial submission to the registry

January 19, 2023

Completed
28 days until next milestone

First Posted

Study publicly available on registry

February 16, 2023

Completed
13 days until next milestone

Study Start

First participant enrolled

March 1, 2023

Completed
3.9 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

January 31, 2027

Expected
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

January 31, 2027

Last Updated

August 19, 2025

Status Verified

August 1, 2024

Enrollment Period

3.9 years

First QC Date

January 19, 2023

Last Update Submit

August 13, 2025

Conditions

Outcome Measures

Primary Outcomes (1)

  • Social Functioning Scale (SFS)

    The Social Functioning Scale (SFS) is an interview-based measure assessing basic social adjustment skills. It can be administered to both the participant and informants. Seven aspects are evaluated: (1) social engagement/withdrawal (with raw scores ranging from 0-15); (2) interpersonal behavior (with raw scores ranging from 0-9); (3) pro-social activities (with scores ranging from 0-66); (4) recreation (with scores ranging from 0-45); (5) independence-competence (with scores ranging from 0-39); (6) independence-performance (scores ranging from 0-39); and (7) employment/occupation (with scores ranging from 0-10). The lowest total score would be a 0 while the highest would be a 223. Higher scores are indicative of better social functioning.

    Change between baseline assessment and 18-month assessment

Secondary Outcomes (12)

  • World Health Organization Quality of Life Scale Brief Version (WHOQOL-BREF)

    Change between baseline assessment and 18-month assessment

  • Questionnaire About the Process of Recovery (QPR)

    Change between baseline assessment and 18-month assessment

  • Positive and Negative Syndrome Scale (PANSS)

    Change between baseline assessment and 18-month assessment

  • Psychotic Symptom Rating Scale (PSYRATS)

    Change between baseline assessment and 18-month assessment

  • Neurocognitive Assessment

    Change between baseline assessment and 18-month assessment

  • +7 more secondary outcomes

Study Arms (3)

Individual CBTp + Group Sham CR

EXPERIMENTAL

Individual formulation-based CBT will be delivered for one hour per week using a manual that has been validated in over 1000 individuals with schizophrenia-spectrum disorders across all stages of illness. Sham CR was developed by Dr. Best and Dr. Bowie (CI) to control for the non-specific effects of CR such as computer practice and group discussion.

Behavioral: Cognitive Behavioural Therapy for Psychosis (CBTp)Behavioral: Sham Cognitive Remediation

Group CR + Individual Befriending (Sham CBTp)

EXPERIMENTAL

Action-based cognitive remediation (ABCR) will be delivered in group sessions one hour per week. ABCR was developed by Dr. Bowie (CI) and Dr. Best (PI) and has been found efficacious for schizophrenia-spectrum disorders in three clinical trials. Befriending will be delivered according to a manual validated to control for the non-specific effects of CBT, such as duration of therapeutic contact, client expectancy effects, therapeutic alliance, and therapist warmth.

Behavioral: Cognitive Remediation Therapy (CR)Behavioral: Befriending

Individual CBTp + Group CR

EXPERIMENTAL

Individual formulation-based CBT will be delivered for one hour per week using a manual that has been validated in over 1000 individuals with schizophrenia-spectrum disorders across all stages of illness. Action-based cognitive remediation (ABCR) will be delivered in group sessions one hour per week. ABCR was developed by Dr. Bowie (CI) and Dr. Best (PI) and has been found efficacious for schizophrenia-spectrum disorders in three clinical trials.

Behavioral: Cognitive Behavioural Therapy for Psychosis (CBTp)Behavioral: Cognitive Remediation Therapy (CR)

Interventions

Individual formulation-based CBT will be delivered for one hour per week using a manual that has been validated in over 1000 individuals with schizophrenia-spectrum disorders across all stages of illness. This approach has demonstrated moderate to large improvements on symptoms and small to moderate effects on functioning. The first four sessions are devoted to building therapeutic rapport and developing collaborative treatment goals. The following phase focuses on developing formulations of why difficulties persist and using cognitive and behavioural change strategies. A longitudinal formulation is then offered to better understand how their difficulties developed. The final 2-4 sessions focus on consolidating the learning that occurred during treatment so that participants can maintain their improvement. Therapy homework is collaboratively assigned at the end of sessions to promote new learning in between sessions.

Individual CBTp + Group CRIndividual CBTp + Group Sham CR

Action-based cognitive remediation (ABCR) will be delivered in group sessions one hour per week. ABCR was developed by Dr. Bowie (CI) and Dr. Best (PI) and has been found efficacious for schizophrenia-spectrum disorders in three clinical trials. ABCR involves practicing computerized training exercises with difficulty level dynamically titrated to improve neurocognitive abilities. Then participants engage in strategy discussions with other group members to develop new cognitive strategies. Finally, participants complete role-play simulations of real-world activities to practice their cognitive strategies in simulations of everyday life. ABCR is more effective for improving functioning than traditional approaches to CR. Homework consists of additional cognitive training and practicing cognitive strategies in everyday life.

Group CR + Individual Befriending (Sham CBTp)Individual CBTp + Group CR
BefriendingBEHAVIORAL

Befriending will be delivered according to a manual validated to control for the non-specific effects of CBT, such as duration of therapeutic contact, client expectancy effects, therapeutic alliance, and therapist warmth. Befriending consists of 1-hour individual sessions once per week and involves a series of conversations similar to those one might have with a social acquaintance. These conversations involve discussion of neutral topics without problem-solving, coping strategies, or exploration of emotion. If emotional or mental health-related topics are brought up therapists redirect back to a neutral topic.

Group CR + Individual Befriending (Sham CBTp)

Sham CR was developed by Dr. Best and Dr. Bowie (CI) to control for the non-specific effects of CR such as computer practice and group discussion. Participants practice similar computerized exercises to ABCR, however, the exercises do not increase in difficulty. Participants then discuss enjoyment of the exercises but any discussion of cognitive strategies is redirected back to a neutral topic. We have previously found this condition to be an effective control for CR, with similar engagement to the active training group.

Individual CBTp + Group Sham CR

Eligibility Criteria

Age18 Years - 65 Years
Sexall
Healthy VolunteersNo
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • Aged 18-65 years
  • Diagnosed with schizophrenia-spectrum disorders
  • Can read, write, and speak English

You may not qualify if:

  • Neurodevelopmental disability or neurocognitive disorder
  • CBT or CR in the past 6 months

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (2)

University of Toronto Scarborough

Scarborough Village, Ontario, M1C 1A4, Canada

RECRUITING

Ontario Shores Centre for Mental Health Sciences (Ontario Shores)

Whitby, Ontario, L1N 5S9, Canada

RECRUITING

MeSH Terms

Conditions

SchizophreniaPsychotic Disorders

Interventions

Cognitive Behavioral Therapy

Condition Hierarchy (Ancestors)

Schizophrenia Spectrum and Other Psychotic DisordersMental Disorders

Intervention Hierarchy (Ancestors)

Behavior TherapyPsychotherapyBehavioral Disciplines and Activities

Study Officials

  • Michael W Best, PhD, C.Psych

    University of Toronto Scarborough

    PRINCIPAL INVESTIGATOR

Central Study Contacts

Mike W Best, PhD, C.Psych

CONTACT

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
TRIPLE
Who Masked
PARTICIPANT, INVESTIGATOR, OUTCOMES ASSESSOR
Masking Details
This will be a double-blind (participant, assessor) trial. Participants will be informed that they will receive one individual session and one group session of treatment per week but will not be told which group they are assigned to. Participants will be instructed not to talk about their therapy to the assessor but if the assessor becomes aware of group allocation, then a new assessor will be assigned for all follow-up assessments. Due to the nature of the interventions, it is not possible for therapists to be blind to treatment condition, however, therapist fidelity to each intervention will be monitored through ratings on established fidelity measures. To protect against contamination separate therapists will deliver the active and control therapies. The Principal Investigator also remains blind to randomization, as the trial manager is the only one who has access to this.
Purpose
TREATMENT
Intervention Model
PARALLEL
Model Details: Participants will be randomized to receive a) individual CBT + group sham CR, b) group CR + individual Befriending, or c) individual CBT + group CR. Block, cohort randomization will be coordinated by the trial manager at the central site (UTSC), with stratification by treatment site. Cohorts of 5 participants will be randomized to one of the 3 treatment conditions in randomized block sizes of 4, 8, or 12 using a pre-specified randomization list.
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Assistant Professor, Principal Investigator

Study Record Dates

First Submitted

January 19, 2023

First Posted

February 16, 2023

Study Start

March 1, 2023

Primary Completion (Estimated)

January 31, 2027

Study Completion (Estimated)

January 31, 2027

Last Updated

August 19, 2025

Record last verified: 2024-08

Data Sharing

IPD Sharing
Will not share

Locations