The PROMIS Sleep Disturbance scale is a computer-adaptive measure where participants report how often in the past 7 days they had various sleep-related experiences (e.g., "my sleep was restful"). It is scored on a 5-point Likert scale where 1 = not at all to 5 = very much. It provides total scores as T-scores (mean = 50, standard deviation (SD) = 10) where higher scores indicate more sleep disturbance.

The Flourishing Index is a 10-item questionnaire where participants report their general level of flourishing (e.g., well-being, health, etc.). It is scored on a 0 to 10-point scale, with anchors varying across items. The total score ranges from 0 to 100 with higher scores indicating higher flourishing.

The Five Facet Mindfulness Questionnaire Acting with Awareness Subscale is a 8-item subscale where participants report on their general ability to focus. It is scored on a 5-point Likert scale where 1 = never or very rarely true to 5 = very often or always true. The total possible range of scores is 8-40 where higher scores indicate a greater ability to focus.

The NIH Toolbox Loneliness is a 5-item questionnaire where participants report how often in the past week they have felt loneliness. It is scored on a 5-point Likert scale where 1 = never to 5 = always. The total possible range of scores is 5-25 where higher scores indicate a greater sense of loneliness.

The Decentering subscale of the Experience Questionnaire is an 11-item questionnaire where participants report on their ability to decenter from their experience. It is scored on a 5-point Likert scale where 1 = never to 5 = all the time. The total possible range of scores is 11-55 where higher scores indicate a greater ability to decenter from experience.

The PROMIS / NIH Toolbox Meaning and Purpose is a computer-adaptive measure where participants report how much meaning and purpose they experience in life (e.g., "I understand my life's meaning"). It is scored on a 5-point Likert scale where 1 = strongly disagree to 5 = strongly agree. It provides total scores as T-scores (mean = 50, SD = 10) where higher scores indicate more meaning and purpose in life.

The single-item PROMIS Pain Intensity scale is a 1-item scale where participants report on their pain intensity in the past 7 days. It is scored on an 11-point Likert-scale where 0 = no pain and 10 = worst pain imaginable. Scores range from 0 to 10, with higher scores indicating higher pain intensity

The PROMIS Pain Interference scale is a computer-adaptive measure where participants report how often in the past 7 days they had pain-related interference in their life (e.g., "how much did pain interfere with your enjoyment of life"). It is scored on a 5-point Likert scale where 1 = not at all to 5 = very much. It provides total scores as T-scores (mean = 50, SD = 10) where higher scores indicate more pain interference.

The Five Facet Mindfulness Questionnaire Nonjudgment Subscale is a 8-item subscale where participants report on their nonjudgment of experience in daily life. It is scored on a 5-point Likert scale where 1 = never or very rarely true to 5 = very often or always true. The total possible range of scores is 8-40 where higher scores indicate a greater nonjudgment of experience.

The Climate Change Anxiety Scale is a 13-item scale where participants report their anxiety regarding climate change (e.g., "I have nightmares about climate change"). It is scored on a 5-point Likert scale where 1 = "never" to 5 = "almost always." Total scores range from 13 to 65 where higher scores indicate greater climate change anxiety.

The Wellbeing Growth Mindset scale is a 3-item scale where participants report whether they believe wellbeing is malleable (e.g., "Your well-being is something about you that you can't change very much."). It is scored on a 6-point Likert scale where 1 = "strongly disagree" to 6 = "strongly agree." Total scores range from 3 to 18 where higher scores indicate greater wellbeing growth mindset.

The HM Index is a 17-item questionnaire assessing qualities trained in the HMP app (awareness, connection, insight, purpose). It is scored on a 0- to 4-point Likert scale where 0 = a low amount (e.g., never, not at all, none of the time) and 4 = a higher amount (e.g., always, to the highest degree, all of the time) of a particular quality. Total scores for the Awareness subscale is 0 to 16 where higher scores indicate more awareness.

The HM Index is a 17-item questionnaire assessing qualities trained in the HMP app (awareness, connection, insight, purpose). It is scored on a 0- to 4-point Likert scale where 0 = a low amount (e.g., never, not at all, none of the time) and 4 = a higher amount (e.g., always, to the highest degree, all of the time) of a particular quality. Total scores for the Connection subscale range from 0 to 24, where higher scores indicate more connection.

The HM Index is a 17-item questionnaire assessing qualities trained in the HMP app (awareness, connection, insight, purpose). It is scored on a 0- to 4-point Likert scale where 0 = a low amount (e.g., never, not at all, none of the time) and 4 = a higher amount (e.g., always, to the highest degree, all of the time) of a particular quality. Total scores for the Insight subscale range from 0 to 12, where higher scores indicate more insight.

The HM Index is a 17-item questionnaire assessing qualities trained in the HMP app (awareness, connection, insight, purpose). It is scored on a 0- to 4-point Likert scale where 0 = a low amount (e.g., never, not at all, none of the time) and 4 = a higher amount (e.g., always, to the highest degree, all of the time) of a particular quality. Total scores for the Purpose subscale range from 0 to 16, where higher scores indicate more purpose.

The Life Orientation Test - Revised is a 6-item scale where participants report their level of optimism (e.g., "In uncertain times, I usually expect the best"). It is scored on a 5-point Likert scale where 0 = "strongly disagree" to 4 = "strongly agree." Total scores range from 0 to 24 where higher scores indicate greater optimism.

The Perceived Stress Scale is a 10-item scale where participants report their level of perceived stress (e.g., "In the last month, how often have you felt nervous and 'stressed'?"). It is scored on a 5-point Likert scale where 0 = "never" to 4 = "very often." Total scores range from 0 to 40 where higher scores indicate greater perceived stress.

The Perseverative Thinking Questionnaire is a 15-item scale where participants report their level of repetitive negative thinking (e.g., "My thoughts repeat themselves"). It is scored on a 5-point Likert scale where 0 = "never" to 4 = "almost always." Total scores range from 0 to 60 where higher scores indicate greater perseverative thinking.

The Satisfaction with Life Scale is a 5-item scale where participants report their level of satisfaction with life (e.g., "In most ways my life is close to ideal"). It is scored on a 7-point Likert scale where 1 = "strongly disagree" to 7 = "strongly agree." Total scores range from 5 to 35 where higher scores indicate greater satisfaction with life.

The Subjective Happiness Scale is a 4-item scale where participants report their level of subjective happiness (e.g., "In general, I consider myself [not a very happy person, a very happy person]"). It is scored on a 7-point Likert scale where 1 = less happy to 7 = more happy. Total scores range from 4 to 28 where higher scores indicate greater subjective happiness.

The PRIUSS-3 is a 3-item scale where participants report their level of problematic internet use. It is scored on a 4-point Likert scale where 0 = never to 4 = very often. Total scores range from 0 to 12, where higher scores indicate more problematic internet use.

Dried blood spot samples will be used to measure two inflammatory cytokines (C-reactive protein (CRP) and interleukin-6 (IL-6)). Additionally mRNA assays will be used to detect and quantify inflammatory gene expression detect and monitor cellular immune responses. Analyses will focus on transcripts from ~200 genes known to be involved in the regulation of inflammation, and will consider key transcripts (e.g., IL-1beta, TNF-alpha) as well as summary measures reflecting the activity of transcriptional networks that coordinate inflammation (NF-kB, AP-1).

Genetic analyses of the microbiome of the fecal sample (microorganism DNA, not that of the person) will be performed. Reported here are the observed (total number of distinct taxa) and calculated (Chao1 = N + S2 / (2 D), where N is the number of observed OTUs (Operational Taxonomic Units), S is the number of singleton OTUs, and D is the number of doublet OTUs) number of species represented in the sample. Chao1 is a species richness calculator that accounts for rare species.

Genetic analyses of the microbiome of the fecal sample (microorganism DNA, not that of the person) will be performed. Shannon Diversity Index quantifies both the richness and the evenness of a community. It takes into account the number of taxa (richness) and their relative abundances (evenness). A higher Shannon index value indicates greater diversity, with both a high number of taxa and more even distribution of abundances among them. It is often used to assess the balance between species in a community. Typically ranges from 0-5 with higher numbers indicating increasing species diversity.

Genetic analyses of the microbiome of the fecal sample (microorganism DNA, not that of the person) will be performed. Simpson is the probability that any two microbes are the same species, ranging from 0-1. Inverse Simpson (1 / Simpson) considers both richness and evenness. It places greater weight on the more abundant taxa. A higher inverse Simpson index suggests a more even distribution of taxa, with fewer dominant species. The inverse Simpson index is sensitive to the presence of dominant species and may emphasize diversity loss when one or a few species dominate the community.

Genetic analyses of the microbiome of the fecal sample (microorganism DNA, not that of the person) will be performed. Pielou Evenness Index measures how evenly the individuals are distributed across the taxa in a sample. It is calculated by dividing the Shannon diversity index by the maximum possible value of the Shannon index (which occurs when all taxa are equally abundant). The Pielou index ranges from 0 (no evenness, where one species dominates) to 1 (perfect evenness, where all species are equally abundant).

Genetic analyses of the microbiome of the fecal sample (microorganism DNA, not that of the person) will be performed. Simpson's Dominance Index measures the probability that two randomly selected individuals from a community belong to the same species (or taxon). It ranges from 0 to 1, where 0 indicates perfect diversity (no dominance of a single species) and values closer to 1 indicate that one or a few species dominate the community. A lower Simpson's dominance score suggests a more diverse community, while a higher score indicates a community dominated by a few taxa.

Participants provide video recordings of their face while responding to a prompt watching brief videos of positive valence (e.g., baby giggling). Data are reported in Action Unit 6 (AU6) of Facial Action Coding System (FACS). FACS is an anatomically-based system for describing facial movement, breaking facial expressions into individual muscle movements called Action Units (AUs). The scores indicate the intensity of cheek movement (0-100), higher movements indicate more intense movement.

Meditation training has the capacity to normalize the overgeneralized inflexible cognition endemic to depression, which is hypothesized to relate to alterations in the hippocampal-dependent process of pattern separation. The investigators will use a pattern separation task to evaluate hippocampal function. The Lure Discrimination Task (LDI) is the difference between the probability of giving a "Similar" response to the lure items (similar to target items) minus the probability of giving a "Similar" response to the foils (unrelated to target items). Larger differences indicate increased discrimination.

Participants provide recordings of their voice while responding to a prompt that asks to share information about their day. These recordings provide the opportunity to explore indicators of self-referent, inflexible, & over-generalized thinking within natural language. Reported here is the "I" self-referential word frequency.

Participants provide recordings of their voice while responding to a prompt that asks to share information about their day. These recordings provide the opportunity to explore negative affect word use. Data are reported in percentage (0-100) where higher numbers indicate more intense negative sentiment.

Participants provide recordings of their voice while responding to a prompt that asks to share information about their day. These recordings provide the opportunity to explore negative affect word use. Data are reported in percentage (0-100) where higher numbers indicate greater positive sentiment.

The Treatment Expectancies is a 6-item scale assessing how much participants believed the training program was helpful to them. Items assess how participants think (e.g., "At this point, how logical does the program offered to you seem?") and feel (e.g., "At this point, how much do you really feel that the program helped you to reduce your stress symptoms?"). Items are scored on either a 9-point Likert scale (e.g., 1 = "not at all logical" to 9 = "very logical") or on a percentage ("At the end of the program, how much improvement in your symptoms do you really feel occurred?", 0% to 100%). Higher scores reflect higher treatment expectancies.

The PHQ-8 is an 8-item questionnaire where participants report how often in the past 2 weeks they were bothered by specific problems. Increase in scores indicates increase is depression symptoms.

The Digital Working Alliance Inventory is a 6-item scale where participants report their working alliance with the HMP app (e.g., "The HMP app supports me to overcome challenges"). It is scored on a 7-point Likert scale where 1 = "strongly disagree" to 7 = "strongly agree." Total scores range from 6 to 42 where higher scores indicate greater working alliance.

The Inclusion of Nature in Self is a single item measure assessing the degree to which someone views nature as a part of their sense of self. Participants indicate which of a series of overlapping circles most closely resembles nature and their self. More overlapping circles indicate greater inclusion of nature in self.

The Mindfulness Adherence Questionnaire informal practice items are 6-items assessing the application of mindfulness during daily life (e.g., "In your daily life, how much of the time were you practicing being gentle and compassionate toward yourself?"). It is scored on a 7-point Likert scale where 0 = "never" to 6 = "always." Total scores range from 0 to 42 where higher scores indicate greater informal mindfulness practice.

Two items assessing positive affect are scored on a 1- to 7-point Likert scale where 1 = not at all and 7 = very much. Data comes from multiple surveys.

Two items assessing negative affect are scored on a 1- to 7-point Likert scale where 1 = not at all and 7 = very much. Data comes from multiple surveys.

A single item assessing focus during HMP activities is scored on a 1- to 7-point Likert scale where 1 = not at all and 7 = most of the time. Data comes from multiple surveys.

Participants will receive access to the 4-week HMP Foundations module with guided meditation practices removed. The active control will include only the didactic content included in HMP without the guided meditation practices.

Healthy Minds Program: HMP is a 4-week mobile health (mHealth) meditation training program.

Participants will receive access to HMP at the end of the study and will be encouraged to continue with their usual care.

Total of all reporting groups

Participants will receive access to the 4-week HMP Foundations module with guided meditation practices removed. The active control will include only the didactic content included in HMP without the guided meditation practices.

Healthy Minds Program: HMP is a 4-week mobile health (mHealth) meditation training program.

Participants will receive access to HMP at the end of the study and will be encouraged to continue with their usual care.

The GAD-7 is a 7-item questionnaire where participants report how often in the past 2 weeks they were bothered by specific problems. It is scored on a 4-point Likert scale where 0 = not at all to 3 = nearly every day. The total possible range of scores is 0-21 where higher scores indicate more anxious symptoms.

Some participants did not provide data at all time points.

The PROMIS Sleep Disturbance scale is a computer-adaptive measure where participants report how often in the past 7 days they had various sleep-related experiences (e.g., "my sleep was restful"). It is scored on a 5-point Likert scale where 1 = not at all to 5 = very much. It provides total scores as T-scores (mean = 50, standard deviation (SD) = 10) where higher scores indicate more sleep disturbance.

Some participants did not provide data at all time points.

The Flourishing Index is a 10-item questionnaire where participants report their general level of flourishing (e.g., well-being, health, etc.). It is scored on a 0 to 10-point scale, with anchors varying across items. The total score ranges from 0 to 100 with higher scores indicating higher flourishing.

Some participants did not provide data at all time-points

The Five Facet Mindfulness Questionnaire Acting with Awareness Subscale is a 8-item subscale where participants report on their general ability to focus. It is scored on a 5-point Likert scale where 1 = never or very rarely true to 5 = very often or always true. The total possible range of scores is 8-40 where higher scores indicate a greater ability to focus.

Some participants did not provide data at all time points.

The NIH Toolbox Loneliness is a 5-item questionnaire where participants report how often in the past week they have felt loneliness. It is scored on a 5-point Likert scale where 1 = never to 5 = always. The total possible range of scores is 5-25 where higher scores indicate a greater sense of loneliness.

Some participants did not provide data at all time points.

The Decentering subscale of the Experience Questionnaire is an 11-item questionnaire where participants report on their ability to decenter from their experience. It is scored on a 5-point Likert scale where 1 = never to 5 = all the time. The total possible range of scores is 11-55 where higher scores indicate a greater ability to decenter from experience.

Some participants did not provide data at all time points.

The PROMIS / NIH Toolbox Meaning and Purpose is a computer-adaptive measure where participants report how much meaning and purpose they experience in life (e.g., "I understand my life's meaning"). It is scored on a 5-point Likert scale where 1 = strongly disagree to 5 = strongly agree. It provides total scores as T-scores (mean = 50, SD = 10) where higher scores indicate more meaning and purpose in life.

Some participants did not provide data at all time points.

The single-item PROMIS Pain Intensity scale is a 1-item scale where participants report on their pain intensity in the past 7 days. It is scored on an 11-point Likert-scale where 0 = no pain and 10 = worst pain imaginable. Scores range from 0 to 10, with higher scores indicating higher pain intensity

Some participants did not provide data at all time points.

The PROMIS Pain Interference scale is a computer-adaptive measure where participants report how often in the past 7 days they had pain-related interference in their life (e.g., "how much did pain interfere with your enjoyment of life"). It is scored on a 5-point Likert scale where 1 = not at all to 5 = very much. It provides total scores as T-scores (mean = 50, SD = 10) where higher scores indicate more pain interference.

Some participants did not provide data at all time points.

The Five Facet Mindfulness Questionnaire Nonjudgment Subscale is a 8-item subscale where participants report on their nonjudgment of experience in daily life. It is scored on a 5-point Likert scale where 1 = never or very rarely true to 5 = very often or always true. The total possible range of scores is 8-40 where higher scores indicate a greater nonjudgment of experience.

Some participants did not provide data at all time points.

The Climate Change Anxiety Scale is a 13-item scale where participants report their anxiety regarding climate change (e.g., "I have nightmares about climate change"). It is scored on a 5-point Likert scale where 1 = "never" to 5 = "almost always." Total scores range from 13 to 65 where higher scores indicate greater climate change anxiety.

Some participants did not provide data at all time points.

The Wellbeing Growth Mindset scale is a 3-item scale where participants report whether they believe wellbeing is malleable (e.g., "Your well-being is something about you that you can't change very much."). It is scored on a 6-point Likert scale where 1 = "strongly disagree" to 6 = "strongly agree." Total scores range from 3 to 18 where higher scores indicate greater wellbeing growth mindset.

Some participants did not provide data at all time points.

The HM Index is a 17-item questionnaire assessing qualities trained in the HMP app (awareness, connection, insight, purpose). It is scored on a 0- to 4-point Likert scale where 0 = a low amount (e.g., never, not at all, none of the time) and 4 = a higher amount (e.g., always, to the highest degree, all of the time) of a particular quality. Total scores for the Awareness subscale is 0 to 16 where higher scores indicate more awareness.

Some participants did not provide data at all time points.

The HM Index is a 17-item questionnaire assessing qualities trained in the HMP app (awareness, connection, insight, purpose). It is scored on a 0- to 4-point Likert scale where 0 = a low amount (e.g., never, not at all, none of the time) and 4 = a higher amount (e.g., always, to the highest degree, all of the time) of a particular quality. Total scores for the Connection subscale range from 0 to 24, where higher scores indicate more connection.

Some participants did not provide data at all time points.

The HM Index is a 17-item questionnaire assessing qualities trained in the HMP app (awareness, connection, insight, purpose). It is scored on a 0- to 4-point Likert scale where 0 = a low amount (e.g., never, not at all, none of the time) and 4 = a higher amount (e.g., always, to the highest degree, all of the time) of a particular quality. Total scores for the Insight subscale range from 0 to 12, where higher scores indicate more insight.

Some participants did not provide data at all time points.

The HM Index is a 17-item questionnaire assessing qualities trained in the HMP app (awareness, connection, insight, purpose). It is scored on a 0- to 4-point Likert scale where 0 = a low amount (e.g., never, not at all, none of the time) and 4 = a higher amount (e.g., always, to the highest degree, all of the time) of a particular quality. Total scores for the Purpose subscale range from 0 to 16, where higher scores indicate more purpose.

Some participants did not provide data at all time points.

The Life Orientation Test - Revised is a 6-item scale where participants report their level of optimism (e.g., "In uncertain times, I usually expect the best"). It is scored on a 5-point Likert scale where 0 = "strongly disagree" to 4 = "strongly agree." Total scores range from 0 to 24 where higher scores indicate greater optimism.

Some participants did not provide data at all time points.

The Perceived Stress Scale is a 10-item scale where participants report their level of perceived stress (e.g., "In the last month, how often have you felt nervous and 'stressed'?"). It is scored on a 5-point Likert scale where 0 = "never" to 4 = "very often." Total scores range from 0 to 40 where higher scores indicate greater perceived stress.

Some participants did not provide data at all time points.

The Perseverative Thinking Questionnaire is a 15-item scale where participants report their level of repetitive negative thinking (e.g., "My thoughts repeat themselves"). It is scored on a 5-point Likert scale where 0 = "never" to 4 = "almost always." Total scores range from 0 to 60 where higher scores indicate greater perseverative thinking.

Some participants did not provide data at all time points.

The Satisfaction with Life Scale is a 5-item scale where participants report their level of satisfaction with life (e.g., "In most ways my life is close to ideal"). It is scored on a 7-point Likert scale where 1 = "strongly disagree" to 7 = "strongly agree." Total scores range from 5 to 35 where higher scores indicate greater satisfaction with life.

Some participants did not provide data at all time points.

The Subjective Happiness Scale is a 4-item scale where participants report their level of subjective happiness (e.g., "In general, I consider myself [not a very happy person, a very happy person]"). It is scored on a 7-point Likert scale where 1 = less happy to 7 = more happy. Total scores range from 4 to 28 where higher scores indicate greater subjective happiness.

Some participants did not provide data at all time points.

The PRIUSS-3 is a 3-item scale where participants report their level of problematic internet use. It is scored on a 4-point Likert scale where 0 = never to 4 = very often. Total scores range from 0 to 12, where higher scores indicate more problematic internet use.

Some participants did not provide data at all time points.

Dried blood spot samples will be used to measure two inflammatory cytokines (C-reactive protein (CRP) and interleukin-6 (IL-6)). Additionally mRNA assays will be used to detect and quantify inflammatory gene expression detect and monitor cellular immune responses. Analyses will focus on transcripts from ~200 genes known to be involved in the regulation of inflammation, and will consider key transcripts (e.g., IL-1beta, TNF-alpha) as well as summary measures reflecting the activity of transcriptional networks that coordinate inflammation (NF-kB, AP-1).

Data not provided or evaluable from all participants at all time points

Dried blood spot samples will be used to measure two inflammatory cytokines (C-reactive protein (CRP) and interleukin-6 (IL-6)). Additionally mRNA assays will be used to detect and quantify inflammatory gene expression detect and monitor cellular immune responses. Analyses will focus on transcripts from ~200 genes known to be involved in the regulation of inflammation, and will consider key transcripts (e.g., IL-1beta, TNF-alpha) as well as summary measures reflecting the activity of transcriptional networks that coordinate inflammation (NF-kB, AP-1).

Data not provided or evaluable from all participants at all time points

Genetic analyses of the microbiome of the fecal sample (microorganism DNA, not that of the person) will be performed. Reported here are the observed (total number of distinct taxa) and calculated (Chao1 = N + S2 / (2 D), where N is the number of observed OTUs (Operational Taxonomic Units), S is the number of singleton OTUs, and D is the number of doublet OTUs) number of species represented in the sample. Chao1 is a species richness calculator that accounts for rare species.

Some participants did not provide data at all time-points.

Genetic analyses of the microbiome of the fecal sample (microorganism DNA, not that of the person) will be performed. Shannon Diversity Index quantifies both the richness and the evenness of a community. It takes into account the number of taxa (richness) and their relative abundances (evenness). A higher Shannon index value indicates greater diversity, with both a high number of taxa and more even distribution of abundances among them. It is often used to assess the balance between species in a community. Typically ranges from 0-5 with higher numbers indicating increasing species diversity.

Some participants did not provide data at all time-points.

Genetic analyses of the microbiome of the fecal sample (microorganism DNA, not that of the person) will be performed. Simpson is the probability that any two microbes are the same species, ranging from 0-1. Inverse Simpson (1 / Simpson) considers both richness and evenness. It places greater weight on the more abundant taxa. A higher inverse Simpson index suggests a more even distribution of taxa, with fewer dominant species. The inverse Simpson index is sensitive to the presence of dominant species and may emphasize diversity loss when one or a few species dominate the community.

Some participants did not provide data at all time-points.

Genetic analyses of the microbiome of the fecal sample (microorganism DNA, not that of the person) will be performed. Pielou Evenness Index measures how evenly the individuals are distributed across the taxa in a sample. It is calculated by dividing the Shannon diversity index by the maximum possible value of the Shannon index (which occurs when all taxa are equally abundant). The Pielou index ranges from 0 (no evenness, where one species dominates) to 1 (perfect evenness, where all species are equally abundant).

Some participants did not provide data at all time-points.

Genetic analyses of the microbiome of the fecal sample (microorganism DNA, not that of the person) will be performed. Simpson's Dominance Index measures the probability that two randomly selected individuals from a community belong to the same species (or taxon). It ranges from 0 to 1, where 0 indicates perfect diversity (no dominance of a single species) and values closer to 1 indicate that one or a few species dominate the community. A lower Simpson's dominance score suggests a more diverse community, while a higher score indicates a community dominated by a few taxa.

Some participants did not provide data at all time-points.

Participants provide video recordings of their face while responding to a prompt watching brief videos of positive valence (e.g., baby giggling). Data are reported in Action Unit 6 (AU6) of Facial Action Coding System (FACS). FACS is an anatomically-based system for describing facial movement, breaking facial expressions into individual muscle movements called Action Units (AUs). The scores indicate the intensity of cheek movement (0-100), higher movements indicate more intense movement.

Some participants did not provide data at all time-points.

Meditation training has the capacity to normalize the overgeneralized inflexible cognition endemic to depression, which is hypothesized to relate to alterations in the hippocampal-dependent process of pattern separation. The investigators will use a pattern separation task to evaluate hippocampal function. The Lure Discrimination Task (LDI) is the difference between the probability of giving a "Similar" response to the lure items (similar to target items) minus the probability of giving a "Similar" response to the foils (unrelated to target items). Larger differences indicate increased discrimination.

Some participants did not provide data at all time-points.

Participants provide recordings of their voice while responding to a prompt that asks to share information about their day. These recordings provide the opportunity to explore indicators of self-referent, inflexible, & over-generalized thinking within natural language. Reported here is the "I" self-referential word frequency.

Some participants did not provide data at all time-points.

Participants provide recordings of their voice while responding to a prompt that asks to share information about their day. These recordings provide the opportunity to explore negative affect word use. Data are reported in percentage (0-100) where higher numbers indicate more intense negative sentiment.

Some participants did not provide data at all time points.

Participants provide recordings of their voice while responding to a prompt that asks to share information about their day. These recordings provide the opportunity to explore negative affect word use. Data are reported in percentage (0-100) where higher numbers indicate greater positive sentiment.

Some participants did not provide data at all time points.

The Treatment Expectancies is a 6-item scale assessing how much participants believed the training program was helpful to them. Items assess how participants think (e.g., "At this point, how logical does the program offered to you seem?") and feel (e.g., "At this point, how much do you really feel that the program helped you to reduce your stress symptoms?"). Items are scored on either a 9-point Likert scale (e.g., 1 = "not at all logical" to 9 = "very logical") or on a percentage ("At the end of the program, how much improvement in your symptoms do you really feel occurred?", 0% to 100%). Higher scores reflect higher treatment expectancies.

The usual care arm was not surveyed for this measure per protocol.

The PHQ-8 is an 8-item questionnaire where participants report how often in the past 2 weeks they were bothered by specific problems. Increase in scores indicates increase is depression symptoms.

Some participants did not provide data at all time-points.

The Digital Working Alliance Inventory is a 6-item scale where participants report their working alliance with the HMP app (e.g., "The HMP app supports me to overcome challenges"). It is scored on a 7-point Likert scale where 1 = "strongly disagree" to 7 = "strongly agree." Total scores range from 6 to 42 where higher scores indicate greater working alliance.

Some participants did not provide data at all time points. The usual care arm was not surveyed for this measure per protocol.