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Sleep, Chronotype, and Prosocial Allocation Decisions (SCPAD)

14 de septiembre de 2026 actualizado por: Dr YU Cehao, The Hong Kong Polytechnic University

Associations Between Sleep Quality, Circadian Timing, and Prosocial Allocation Decisions in Adults

This observational behavioural study examines whether individual differences in sleep quality, sleep timing, and chronotype are associated with prosocial allocation decisions in adults. Participants will complete self-report sleep and circadian questionnaires, including the Pittsburgh Sleep Quality Index and the Munich Chronotype Questionnaire, a 7-day sleep diary, and a brief computer-based Dictator Game allocation task.

The study does not involve sleep deprivation, sleep restriction, treatment, clinical diagnosis, medication, or medical devices. Participants will not be asked to change their sleep schedule. The Dictator Game decisions are hypothetical and do not affect participants' compensation. The study is intended to describe associations between naturally occurring sleep-related individual differences and behavioural allocation choices, not to diagnose or treat sleep or mental health conditions.

Descripción general del estudio

Estado

Reclutamiento

Condiciones

Intervención / Tratamiento

Descripción detallada

This is a non-clinical observational behavioural study of adults aged 18 years or above. The study investigates whether naturally occurring differences in subjective sleep quality, sleep timing, and circadian preference are associated with prosocial decision-making in a computer-based allocation task.

Participants will first provide informed consent and will be assigned a participant code so that research data can be pseudonymised. They will complete demographic questions and sleep-related self-report measures. These measures include the Pittsburgh Sleep Quality Index, which assesses subjective sleep quality over the previous month, and the Munich Chronotype Questionnaire, which assesses sleep timing on workdays and free days and provides chronotype-related variables. Participants will also complete a 7-day sleep diary recording daily sleep-related information such as bedtime, estimated sleep onset, wake time, rise time, naps, subjective sleep quality, and schedule-related information.

Prosocial allocation behaviour will be assessed using a brief computer-based Dictator Game task. In this task, participants make hypothetical allocation choices involving distributions of money between themselves and another party. No deception cover story will be used. Participants will not be falsely told that they are interacting with a real paired participant if no real allocation exists. Dictator Game choices are hypothetical and do not affect actual compensation.

The primary aim is to examine associations between sleep quality, sleep timing, chronotype-related measures, and prosocial allocation behaviour. Secondary analyses may explore whether 7-day sleep diary measures provide additional information beyond retrospective questionnaire measures. Exploratory analyses may examine whether chronotype, sleep timing, or time of day moderates associations between sleep-related measures and Dictator Game behaviour. These analyses will be interpreted cautiously and will not be used to make clinical claims.

The study is not designed to diagnose, treat, or induce any sleep disorder, mental health condition, or other clinical condition. The PSQI, MCTQ, and sleep diary are used as non-diagnostic research measures. No clinical diagnosis, treatment recommendation, or personalised sleep advice will be provided. The expected risks are minimal and may include mild boredom or tiredness, mild discomfort when reflecting on sleep habits or making self-other allocation decisions, minor inconvenience from completing the 7-day diary, and privacy concerns about sleep schedule information. Risk will be minimised through informed consent, voluntary participation, the right to withdraw, non-clinical wording, pseudonymisation, separate storage of identifiable records, and restricted access to research data.

Tipo de estudio

De observación

Inscripción (Estimado)

128

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Estudio Contacto

Copia de seguridad de contactos de estudio

Ubicaciones de estudio

    • Hung Hom
      • Kowloon, Hung Hom, Hong Kong
        • Reclutamiento
        • Child Development Centre
        • Investigador principal:
          • Cehao Yu, PhD
        • Contacto:
    • Kowloon
      • Hung Hom, Kowloon, Hong Kong
        • Aún no reclutando
        • The Hong Kong Polytechnic University
        • Contacto:
        • Contacto:
        • Sub-Investigador:
          • Bryant HUI, PhD

Criterios de participación

Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.

Criterio de elegibilidad

Edades elegibles para estudiar

  • Adulto
  • Adulto Mayor

Acepta Voluntarios Saludables

Sí

Método de muestreo

Muestra no probabilística

Población de estudio

Adults aged 18 years or above will be recruited as healthy volunteers from university and community settings. Eligible participants may include university students, university staff, and community adults who can understand English or Chinese study materials and complete computer-based behavioural tasks, sleep-related questionnaires, and a 7-day sleep diary. The study is not limited to PolyU students and is not designed to recruit participants with any specific sleep disorder, mental health condition, or clinical diagnosis.

Descripción

Inclusion Criteria:

  • Aged 18 years or above.
  • Able to provide informed consent.
  • Able to understand English or Chinese study materials.
  • Able to complete computer-based behavioural tasks and self-report questionnaires.
  • Willing to complete a 7-day sleep diary.

Exclusion Criteria:

  • Aged under 18 years.
  • Unable to provide informed consent.
  • Unable to complete study materials in English or Chinese.
  • Prior participation in the same study.
  • Self-reported condition or circumstance that would make participation in a brief computer-based decision-making task or sleep-related questionnaires inappropriate or distressing.

Plan de estudios

Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.

¿Cómo está diseñado el estudio?

Detalles de diseño

Cohortes e Intervenciones

Grupo / Cohorte
Intervención / Tratamiento
Adult Participants
Adults aged 18 years or above who provide informed consent and complete sleep-related self-report measures, a 7-day sleep diary, and a computer-based prosocial allocation task. Participants are not assigned to any sleep manipulation, treatment, or intervention. Sleep quality, sleep timing, chronotype, and prosocial allocation behaviour are measured as naturally occurring individual differences.
Participants complete non-diagnostic sleep and circadian self-report measures, including the Pittsburgh Sleep Quality Index, the Munich Chronotype Questionnaire, and a 7-day sleep diary, followed by a brief computer-based Dictator Game allocation task. This is an observational assessment procedure only. Participants are not assigned to a treatment, sleep manipulation, sleep deprivation, sleep restriction, or behaviour-change intervention.

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Dictator Game Prosocial Allocation Score
Periodo de tiempo: Day 1 (single study session)
Prosocial allocation behaviour will be measured using a brief computer-based Dictator Game task. The primary behavioural score will be the number or proportion of trials in which the participant selects the more prosocial allocation option across the task, with higher scores indicating more prosocial allocation choices.
Day 1 (single study session)

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Pittsburgh Sleep Quality Index Global Score
Periodo de tiempo: Day 1 (single study session)
Subjective sleep quality over the previous month will be assessed using the Pittsburgh Sleep Quality Index (PSQI). The PSQI global score is calculated according to standard scoring procedures and ranges from 0 to 21, with higher scores indicating poorer subjective sleep quality. The PSQI is used as a non-diagnostic research measure.
Day 1 (single study session)
Chronotype (Sleep-Corrected Mid-Sleep on Free Days, MSFsc) From the Munich Chronotype Questionnaire
Periodo de tiempo: Day 1 (single study session)
Circadian preference (chronotype) will be assessed using the Munich Chronotype Questionnaire (MCTQ). The chronotype variable reported is the sleep-corrected mid-sleep time on free days (MSFsc), expressed as clock time in decimal hours, with later values indicating a later (more evening) chronotype. The MCTQ is used as a non-diagnostic research measure.
Day 1 (single study session)
Mean Sleep Duration From the 7-Day Sleep Diary
Periodo de tiempo: Daily for the 7 days before the study session (Days -7 to -1)
Nightly sleep duration will be recorded in a 7-day sleep diary and averaged across the diary days to yield mean sleep duration, reported in hours per night.
Daily for the 7 days before the study session (Days -7 to -1)

Otras medidas de resultado

Medida de resultado
Medida Descripción
Periodo de tiempo
Dictator Game Response Time
Periodo de tiempo: Day 1 (single study session)
Response time for Dictator Game allocation choices may be recorded as an exploratory behavioural measure, where available. Response time will not be interpreted as a clinical measure.
Day 1 (single study session)

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Patrocinador

Publicaciones y enlaces útiles

La persona responsable de ingresar información sobre el estudio proporciona voluntariamente estas publicaciones. Estos pueden ser sobre cualquier cosa relacionada con el estudio.

Fechas de registro del estudio

Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados ​​por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.

Fechas importantes del estudio

Inicio del estudio (Actual)

1 de julio de 2026

Finalización primaria (Estimado)

30 de junio de 2028

Finalización del estudio (Estimado)

30 de junio de 2028

Fechas de registro del estudio

Enviado por primera vez

30 de junio de 2026

Primero enviado que cumplió con los criterios de control de calidad

6 de julio de 2026

Publicado por primera vez (Actual)

13 de julio de 2026

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

17 de septiembre de 2026

Última actualización enviada que cumplió con los criterios de control de calidad

14 de septiembre de 2026

Última verificación

1 de junio de 2026

Más información

Términos relacionados con este estudio

Otros números de identificación del estudio

  • HSEARS20260629007

Plan de datos de participantes individuales (IPD)

¿Planea compartir datos de participantes individuales (IPD)?

NO

Descripción del plan IPD

Individual participant data will not be shared outside the approved research team. Study findings will be reported in aggregate form only. Pseudonymised or anonymised data may be retained for future ethically approved research only if permitted by participant consent and institutional ethics approval.

Información sobre medicamentos y dispositivos, documentos del estudio

Estudia un producto farmacéutico regulado por la FDA de EE. UU.

No

Estudia un producto de dispositivo regulado por la FDA de EE. UU.

No

Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .