Massive youth mental health study aims to unravel why disorders cluster

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: The participant must meet all of the inclusion criteria to be eligible for this research study: * Light Phenotype Eligibility Must sign and date the informed consent form, or provide assent and have a Substitute Decision Maker provide informed consent; Aged 11-24 years old at the time of screening; Any person within age criteria who has previously sought, is seeking, or is accessing mental health services; Are able to complete assessments in English. Deep Phenotype Eligibility Must be part of the CALM light phenotype cohort; Must sign and date the deep phenotyping informed consent form, or provide assent and have a Substitute Decision Maker provide informed consent. Light Phenotype Caregiver Participant Eligibility: Any caregiver of a CALM child/youth participant is eligible to participate in the study, insofar as the child/youth participant has consented to the light phenotype cohort and has agreed for their caregiver to be contacted to participate in the study; Must sign and date the informed consent form. Deep Phenotype Caregiver Participant Eligibility: Any caregiver of a CALM child/youth participant is eligible to participate in the study, insofar as the child/youth participant has consented to the deep phenotype cohort and has agreed for their caregiver to be contacted to participate in the study; Must sign and date the informed consent form. Exclusion Criteria: An individual who meets any of the following criteria will be excluded from participation in this research study: Light Phenotype Does not provide informed consent (for those with the capacity to consent) or assent (for those who lack the capacity to consent); For those individuals who lack the capacity to consent, the inability of the parent/legal guardian to provide informed consent for the youth is also an exclusion criterion; Those who lack capacity to consent include individuals who are non-verbal or unable to speak any English. Deep Phenotype Unable to participate in deep phenotyping protocol (e.g., MRI contraindication, uncorrected vision or hearing impairments that would interfere with data collection, unwillingness to complete assessments); No exclusion criteria are based on race, ethnicity, sex or gender. Light Phenotype Caregiver Participant Ineligibility: Caregivers of CALM child/youth participants are ineligible to participate in the study if: The child/youth participant does not agree for their caregiver to be contacted to participate in the study; The child/youth participant is not participating in the light phenotype cohort; Does not provide informed consent (for those with the capacity to consent). Those who lack capacity to consent include individuals who are non-verbal or unable to speak any English. Deep Phenotype Caregiver Participant Ineligibility: Caregivers of CALM child/youth participants are ineligible to participate in the study if: The child/youth participant does not agree for their caregiver to be contacted to participate in the study; The child/youth participant is not participating in the deep phenotype cohort (i.e., is only participating in the light phenotyping cohort); Does not provide informed consent (for those with the capacity to consent). Those who lack capacity to consent include individuals who are non-verbal or unable to speak any English.