Chatbot Intervention Effects on Belief Updating in Anhedonia
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: MI Chatbot Interaction, Active Control Chatbot Interaction.
- Who it may be relevant to
- Registry conditions: Healthy. Basic parameters: 18 years — 40 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- China
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
Unsure about the terms? Read our patient guide →
Official title
Effects of a Chatbot-Based Intervention on Valence-Dependent Belief Updating and Expectancy Bias for Life Events in Individuals With Anhedonia
Overview
The main aim of the present study is to investigate the effects of a Motivational Interviewing-based artificial intelligence chatbot on belief updating in college students with elevated levels of depression and anhedonia by combining a randomized active-control intervention design with pre- and post-intervention behavioral belief updating task assessments.
Detailed description
Anhedonia represents a core characteristic of depression and is characterized by reduced experience of pleasure. It is closely related to decreased motivation, altered reward processing, changes in affective responsiveness, and alterations in intrinsic brain network function. Anhedonia is not specifically targeted by currently available pharmacological interventions. Initial evidence indicates that an increased willingness to change and implementation of change in daily life can alleviate anhedonia.
The present study aims to examine whether a Motivational Interviewing-based AI chatbot can lead to changes in belief updating in college students with elevated anhedonia and depressive symptoms. Belief updating is included because anhedonia and depressive symptoms may be associated with biased or inflexible use of new information, which may influence future expectations, motivation, and engagement in rewarding activities. The belief updating task allows the study to examine how participants revise their expectations after receiving new information. To this end, eligible participants with a total score of 22 or higher on the Snaith-Hamilton Pleasure Scale and a score of 14 or higher on the Beck Depression Inventory will undergo a randomized, between-subjects, active-control intervention study. Participants will be assigned to either a Motivational Interviewing-based chatbot group or an active control chatbot group for 1 week. Pre- and post-intervention assessments will include self-report questionnaires and a behavioral belief updating task to examine psychological and behavioral effects of the intervention.
Interventions
- Behavioral MI Chatbot Interaction
The experimental chatbot is designed to use principles of Motivational Interviewing to support participants in exploring their personal values, motivation for change, and daily behavioral goals related to pleasure, engagement, and reward-seeking. During the intervention period, participants will interact with the chatbot regularly through brief text-based conversations. The chatbot will provide empathic, non-judgmental responses, encourage reflection on current difficulties, and help participant - Behavioral Active Control Chatbot Interaction
Participants will interact with a chatbot matched in format and frequency of use. This chatbot will provide neutral nature-related stories or general natural history content. It will be designed to maintain participant engagement while avoiding therapeutic techniques, motivational interviewing strategies, behavioral activation guidance, or personalized mental health advice. This active control condition will help control for nonspecific effects of chatbot interaction, attention, expectancy, and
Primary outcome measures
- Valence-dependent belief updating bias [Time frame: Baseline before the first chatbot interaction and Week 1 after completion of the chatbot intervention.]
Secondary outcome measures (1)
- Expectancy bias for life events [Time frame: Baseline before the first chatbot interaction and Week 1 after completion of the chatbot intervention]
Eligibility criteria
Inclusion criteria
- 18-40 years
- Right-handed
- Normal or corrected normal visual acuity
- Participants must show elevated anhedonia and depressive symptoms at screening, defined as a total score of 22 or higher on the Snaith-Hamilton Pleasure Scale and a score of 14 or higher on the Beck Depression Inventory
Exclusion criteria
- History of major central nervous system disorders, such as epilepsy, traumatic brain injury, stroke, or brain tumors.
- History of severe mental illness, including schizophrenia spectrum disorders, bipolar disorder, or other psychotic disorders.
- History of substance or alcohol use disorder or substance or alcohol misuse within the past 12 months that may affect study participation or outcome assessment.
- Individuals currently at high risk of suicide, severe self-harm, or experiencing an acute psychiatric crisis.
- Individuals who are currently using psychiatric medications or have undergone psychotherapy within the past 4 weeks that may significantly affect mood, motivation, or reward processing.
- Severe vision or hearing impairments that cannot be corrected and would interfere with task performance.
- Contraindications to MRI scanning, including metallic implants, pacemakers, severe claustrophobia, or other conditions incompatible with MRI.
- Pregnancy or breastfeeding.
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: Yes
Study design
- Allocation
- Randomized
- Model
- Parallel assignment
- Masking
- Double blind
- Primary purpose
- Basic science
Study locations
China · 1 center
- University of Electronic Science and Technology of China — Chengdu
Identifiers
NCT: NCT07663019 · BAM_lab_MI_05