Evaluating PEARL - a Personalized Exercise Assistant Using Reinforcement Learning (Walkmate Study)
Descripción general del estudio
Estado
Condiciones
Descripción detallada
Phase 1 [Model calibration]: Recruit up to 1,000 Fitbit users for a 4 week pilot study. Nudge content and timing will be varied randomly in order to collect training data to prime the RL architecture prior to Phase 2.
Phase 2 [Performance evaluation]: Recruit up to 12,000 Fitbit users for a 60 day study in which they are randomized evenly between the following 4 arms:
[Control] No nudges Randomly selected nudges from the custom nudge library, delivered at constant time and frequency Behavior science (BS)-only nudge agent PEARL agent
Phase 3 [Micro-randomized Trial (MRT) & LLM Feasibility]: Recruit up to 6,000 Fitbit users for a 60 day study in which they are randomized evenly between the following arms:
Behavior science Micro-randomized Trial (BS-MRT): Once per day users will be randomized across the below factors, and receive a message written by a behavior scientist (the same messages from Phase 1 & 2).
COM-B Theme: 6 themes, and 1 control (no nudge) Time of day: 3 timeframes, and 1 control (no nudge) Large Language Model Micro-randomized Trial (LLM-MRT): Once per day users will be randomized across the below factors, and receive a message written by a large language model.
COM-B Theme: 6 themes, and 1 control (no nudge) Time of day: 3 timeframes, and 1 control (no nudge) Large Language Model + Reinforcement Learning (LLM-RL): Once per day, a reinforcement learning model will run to select the optimal COM-B theme and time of day (the same RL model from Phase 2 Arm 4). The nudges will be selected from a repository that is written by a large language model (LLM).
Primary Purpose:
Phase 1: Model calibration Phase 2: Evaluate performance on step count Phase 3: Micro-randomized Trial (MRT) & LLM feasibility
Tipo de estudio
Inscripción (Actual)
Fase
- No aplica
Contactos y Ubicaciones
Ubicaciones de estudio
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California
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Mountain View, California, Estados Unidos, 94043
- Google Office (Digital Study)
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Criterios de participación
Criterio de elegibilidad
Edades elegibles para estudiar
- Adulto
Acepta Voluntarios Saludables
Descripción
Inclusion Criteria:
- Age 22-60 years
- [For Phase 2 & 3] Daily average steps 1 month prior to recruitment is less than 8000
- Owns a Fitbit device & smartphone with Fitbit app
- Willing to share a month of step count data prior to enrollment data
- Wear a Fitbit device regularly (user-reported)
Exclusion Criteria:
- Advised by a doctor to avoid exercising or limit physical activity
- Current employees of Alphabet
- [For phase 2] Have participated in Phase 1 of the study
- [For phase 3] Have participated in Phase 1 or 2 of the study
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Otro
- Asignación: Aleatorizado
- Modelo Intervencionista: Asignación paralela
- Enmascaramiento: Único
Armas e Intervenciones
Grupo de participantes/brazo |
Intervención / Tratamiento |
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Sin intervención: Control
Participants use Fitbit devices, without the addition of the nudge intervention.
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Comparador activo: Random
Participants use Fitbit devices, with the addition of randomly deployed nudge interventions (random timing and theme).
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Participants use Fitbit devices, with the addition of randomly deployed nudge interventions (random timing and theme).
Otros nombres:
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Comparador activo: Behavior Science
Participants use Fitbit devices, with the addition of nudges deployed based on behavior science heuristics.
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Participants use Fitbit devices, with the addition of nudges deployed based on behavior science heuristics.
Otros nombres:
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Experimental: Reinforcement Learning
Participants use Fitbit devices, with the addition of nudges deployed based on a reinforcement learning algorithm.
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Participants use Fitbit devices, with the addition of nudges deployed based on a reinforcement learning algorithm.
Otros nombres:
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¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
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Change in step count from baseline.
Periodo de tiempo: One month prior to enrollment (Baseline) to the second month post-enrollment (60 days total enrollment).
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The average daily step count during the final month minus baseline daily step count during one month before enrollment.
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One month prior to enrollment (Baseline) to the second month post-enrollment (60 days total enrollment).
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Colaboradores e Investigadores
Patrocinador
Colaboradores
Investigadores
- Investigador principal: James A Taylor, MD, Google LLC.
Publicaciones y enlaces útiles
Enlaces Útiles
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio (Actual)
Finalización primaria (Actual)
Finalización del estudio (Actual)
Fechas de registro del estudio
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Actual)
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Más información
Términos relacionados con este estudio
Palabras clave
Términos MeSH relevantes adicionales
Otros números de identificación del estudio
- PEARL-001
Plan de datos de participantes individuales (IPD)
¿Planea compartir datos de participantes individuales (IPD)?
Información sobre medicamentos y dispositivos, documentos del estudio
Estudia un producto farmacéutico regulado por la FDA de EE. UU.
Estudia un producto de dispositivo regulado por la FDA de EE. UU.
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