Dynamic Learning in Depression
15 de junio de 2020 actualizado por: University of Oxford
This study will assess learning bias (the tendency to learn more from negative relative to positive outcomes) at baseline in 3 groups of participants (currently depressed, previously depressed and never depressed).
It will then try to modify this bias using a simple computerised training task completed at home daily for 2 weeks.
Outcome measures include symptoms of depression, cognitive measures (i.e.
accuracy and reaction time during completion of tasks), pupillometry measures and salivary cortisol.
Descripción general del estudio
Estado
Terminado
Condiciones
Intervención / Tratamiento
Descripción detallada
Depressed patients tend to focus on negative, at the expense of positive, events.
This bias of attention is thought to be one factor which causes some people to be at higher risk of developing depression.
One reason depressed people might pay more attention to negative events is that they think those events are more useful to them when they learn about the future.
In this study the investigators will compare the learning styles (i.e.
whether participants focus more on negative or positive information when learning about the future), cognitive biases and salivary cortisol levels (the levels of the hormone cortisol can be measured in the saliva and is known to be raised in those at risk of depression) of currently depressed (N=40), previously depressed (N=40) and never depressed (N=40) participants.
The study will then randomly assign participants to complete one of two version of a learning task daily over two weeks.
One version of the task will be designed to encourage an optimistic learning style, whereas the other will encourage neither an optimistic nor pessimistic learning style.
The study will then retest participants' learning styles, cognitive biases, salivary cortisol and mood (using questionnaire measures) after completion of the task and again after 1 month.
Study activities for participants will be: Screening visit (1 hours), baseline test visit (2 hours), task completion at home (10 mins per day for 2 weeks), test visit 2 (2 hours, completed 2 weeks after baseline visit) and test visit 3 (2 hours, completed 1 month after test visit 2).
Participants will be asked to collect saliva samples, to measure cortisol, immediately after they wake up on the 3 testing days.
Note that testing sessions involve pupillometry (measurement of area of pupil of the eye).
This is done using a specialised camera pointed at the eye and is not invasive.
Tipo de estudio
Intervencionista
Inscripción (Actual)
120
Fase
- No aplica
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.
Ubicaciones de estudio
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Oxfordshire
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Oxford, Oxfordshire, Reino Unido, OX3 7JX
- Dept of Psychiatry, University of Oxford
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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
18 años a 60 años (Adulto)
Acepta Voluntarios Saludables
Sí
Géneros elegibles para el estudio
Todos
Descripción
Inclusion Criteria:
- Participant is willing and able to give informed consent for participation in the study.
- Male or Female, aged 18 to 60 years.
- Fluent in English.
- Not currently taking any psychoactive medications (except hormone contraceptives).
- Currently meets SCID (Structured Clinical Interview for Diagnosis:DSMV) criteria for MDD--Major Depressive Disorder-- (currently depressed group only).
- Meets SCID criteria for 2 or more previous episodes of MDD, has been in remission for at least 3 months (previously depressed group only).
- No previous or current axis I diagnosis (control group only).
Exclusion Criteria:
- Previous or current diagnosis of bipolar disorder or psychotic illness.
- Previous or current anxiety disorder (control group only, anxiety disorder is permitted in current and previously depressed group as long as primary diagnosis of MDD (current or previous) is present).
- Significant suicidal ideation.
- Use of drug of abuse within the last 3 months.
- Receiving treatment (either pharmacological or psychological) for psychiatric condition.
- Medical or surgical treatment which prevents dilation/constriction of pupil.
- Prior experience of the tasks used in the study.
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
- Propósito principal: Tratamiento
- Asignación: Aleatorizado
- Modelo Intervencionista: Asignación paralela
- Enmascaramiento: Cuadruplicar
Armas e Intervenciones
Grupo de participantes/brazo |
Intervención / Tratamiento |
|---|---|
|
Experimental: IBLT (information bias learning task)
Computerised task in which most information is provided by positive outcomes.
Completed for 10 mins per day every day for 2 weeks.
|
Information bias learning task-- a computer based task in which positive information is more useful when learning how best to complete it
|
|
Comparador de placebos: IBLT control
Computerised task in which information is provided by both positive and negative outcomes.
Completed 10 mins per day every day for 2 weeks
|
A control version of the IBLT task-- a computer based task in which both positive and negative information is useful when learning how to complete it
|
¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
|
Quick Inventory of Depressive Symptoms (self report, 16 item)
Periodo de tiempo: change between baseline and week 6
|
Standard questionnaire measure of depressive symptoms
|
change between baseline and week 6
|
Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
|
Quick Inventory of Depressive Symptoms (self report, 16 item)
Periodo de tiempo: change between baseline and week 2
|
standard questionnaire measure of depressive symptoms
|
change between baseline and week 2
|
|
Montgomery Asberg Depression Rating Scale
Periodo de tiempo: change from baseline to week 2 and 6
|
Standard clinical rating scale for depression
|
change from baseline to week 2 and 6
|
|
Learning parameters from information bias assessment task
Periodo de tiempo: baseline to weeks 2 and 6
|
Derived parameters from a computer based learning task (tests process presumed to be altered by IBLT-- information bias learning task-- intervention)
|
baseline to weeks 2 and 6
|
|
Salivary cortisol concentration
Periodo de tiempo: baseline to weeks 2 and 6
|
Samples collected on waking
|
baseline to weeks 2 and 6
|
|
Learning parameters derived from pupillometry data
Periodo de tiempo: baseline to weeks 2 and 6
|
Parameters are derived from regression of pupil size data collected during the information bias assessment task
|
baseline to weeks 2 and 6
|
Otras medidas de resultado
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
|
Speilberger State and Trait Anxiety Inventory
Periodo de tiempo: Baseline to weeks 2 and 6
|
standard questionnaire measure of state and trait anxiety
|
Baseline to weeks 2 and 6
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Depressive Attributes Questionnaire
Periodo de tiempo: baseline to weeks 2 and 6
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Questionnaire assessing attribution bias in depression
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baseline to weeks 2 and 6
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Rumination Response Scale
Periodo de tiempo: baseline to weeks 2 and 6
|
Questionnaire assessing tendency to ruminate
|
baseline to weeks 2 and 6
|
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Snaith-Hamilton Pleasures Scale
Periodo de tiempo: Baseline to weeks 2 and 6
|
Questionnaire assessing anhedonia
|
Baseline to weeks 2 and 6
|
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Accuracy and reaction time during computerised cognitive tasks
Periodo de tiempo: baseline to weeks 2 and 6
|
Scores are derived from computer based tasks assessing emotional perception and learning
|
baseline to weeks 2 and 6
|
Colaboradores e Investigadores
Aquí es donde encontrará personas y organizaciones involucradas en este estudio.
Patrocinador
Investigadores
- Investigador principal: Michael Browning, MB.BS, University of Oxford
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 noviembre de 2016
Finalización primaria (Actual)
3 de junio de 2020
Finalización del estudio (Actual)
3 de junio de 2020
Fechas de registro del estudio
Enviado por primera vez
22 de septiembre de 2016
Primero enviado que cumplió con los criterios de control de calidad
22 de septiembre de 2016
Publicado por primera vez (Estimar)
26 de septiembre de 2016
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
16 de junio de 2020
Última actualización enviada que cumplió con los criterios de control de calidad
15 de junio de 2020
Última verificación
1 de abril de 2019
Más información
Términos relacionados con este estudio
Palabras clave
Términos MeSH relevantes adicionales
Otros números de identificación del estudio
- Dynamic Learning in Depression
Plan de datos de participantes individuales (IPD)
¿Planea compartir datos de participantes individuales (IPD)?
SÍ
Descripción del plan IPD
Anonymised data will be shared with researchers who contact the PI after study completion.
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. .