Feasibility of Intervention Measure - 4 item scale evaluating program feasibility; The measure includes four statements about the feasibility of intervention implementation (ex. the intervention seems implementable; the intervention seems doable; the intervention seems possible; the intervention seems easy to use). Items are rated on a five-point scale (completely disagree, disagree, neither agree or disagree, agree, completely agree). Scores range from 4-20. Higher scores indicate greater feasibility.

Feasibility of Intervention Measure - 4 item scale evaluating program feasibility; The measure includes four statements about the feasibility of intervention implementation (ex. the intervention seems implementable; the intervention seems doable; the intervention seems possible; the intervention seems easy to use). Items are rated on a five-point scale (completely disagree, disagree, neither agree or disagree, agree, completely agree). Scores range from 4-20. Higher scores indicate greater feasibility.

Feasibility of Intervention Measure - 4 item scale evaluating program feasibility; The measure includes four statements about the feasibility of intervention implementation (ex. the intervention seems implementable; the intervention seems doable; the intervention seems possible; the intervention seems easy to use). Items are rated on a five-point scale (completely disagree, disagree, neither agree or disagree, agree, completely agree). Scores range from 4-20. Higher scores indicate greater feasibility.

Feasibility of Intervention Measure - 4 item scale evaluating program feasibility; The measure includes four statements about the feasibility of intervention implementation (ex. the intervention seems implementable; the intervention seems doable; the intervention seems possible; the intervention seems easy to use). Items are rated on a five-point scale (completely disagree, disagree, neither agree or disagree, agree, completely agree). Scores range from 4-20. Higher scores indicate greater feasibility.

Intervention Appropriateness Measure - 4 item scale evaluating program appropriateness; The measure includes four statements about the feasibility of intervention implementation (ex. the intervention seems fitting; the intervention seems suitable; the intervention seems applicable; the intervention seems liked a good match). Items are rated on a five-point scale (completely disagree, disagree, neither agree or disagree, agree, completely agree). Scores range from 4-20. Higher scores indicate greater appropriateness.

Intervention Appropriateness Measure - 4 item scale evaluating program appropriateness; The measure includes four statements about the feasibility of intervention implementation (ex. the intervention seems fitting; the intervention seems suitable; the intervention seems applicable; the intervention seems liked a good match). Items are rated on a five-point scale (completely disagree, disagree, neither agree or disagree, agree, completely agree). Scores range from 4-20. Higher scores indicate greater appropriateness.

Intervention Appropriateness Measure - 4 item scale evaluating program appropriateness; The measure includes four statements about the feasibility of intervention implementation (ex. the intervention seems fitting; the intervention seems suitable; the intervention seems applicable; the intervention seems liked a good match). Items are rated on a five-point scale (completely disagree, disagree, neither agree or disagree, agree, completely agree). Scores range from 4-20. Higher scores indicate greater appropriateness.

Intervention Appropriateness Measure - 4 item scale evaluating program appropriateness; The measure includes four statements about the feasibility of intervention implementation (ex. the intervention seems fitting; the intervention seems suitable; the intervention seems applicable; the intervention seems liked a good match). Items are rated on a five-point scale (completely disagree, disagree, neither agree or disagree, agree, completely agree). Scores range from 4-20. Higher scores indicate greater appropriateness.

Intervention Treatment Receipt Checklist Measure - Eleven item checklist designed for study, measuring whether the coach delivered key aspects of the intervention. The measure includes 10 Likert scale items and one open-ended question on the appropriateness and acceptability of Home Alone and the extent to which Home Alone helps participants with CI modify their environment, engage in pleasant activities, and access social and other resources. The 10 items are scored on a 5 point Likert scale with a total score ranging from 0-50, where higher scores indicate greater treatment fidelity and acceptability of the intervention.

Intervention Treatment Receipt Checklist Measure - Eleven item checklist designed for study, measuring whether the coach delivered key aspects of the intervention. The measure includes 10 Likert scale items and one open-ended question on the appropriateness and acceptability of Home Alone and the extent to which Home Alone helps participants with CI modify their environment, engage in pleasant activities, and access social and other resources. The 10 items are scored on a 5 point Likert scale with a total score ranging from 0-50, where higher scores indicate greater treatment fidelity and acceptability of the intervention.

Intervention Treatment Receipt Checklist Measure - Eleven item checklist designed for study, measuring whether the coach delivered key aspects of the intervention. The measure includes 10 Likert scale items and one open-ended question on the appropriateness and acceptability of Home Alone and the extent to which Home Alone helps participants with CI modify their environment, engage in pleasant activities, and access social and other resources. The 10 items are scored on a 5 point Likert scale with a total score ranging from 0-50, where higher scores indicate greater treatment fidelity and acceptability of the intervention.

Intervention Treatment Receipt Checklist Measure - Eleven item checklist designed for study, measuring whether the coach delivered key aspects of the intervention. The measure includes 10 Likert scale items and one open-ended question on the appropriateness and acceptability of Home Alone and the extent to which Home Alone helps participants with CI modify their environment, engage in pleasant activities, and access social and other resources. The 10 items are scored on a 5 point Likert scale with a total score ranging from 0-50, where higher scores indicate greater treatment fidelity and acceptability of the intervention.

Lubben Social Network Scale-6 6 item scale evaluating social engagement; Items assess social contact and support including family and friends; Scores range from 0 to 30, with higher scores representing more social engagement.

Lubben Social Network Scale-6 6 item scale evaluating social engagement; Items assess social contact and support including family and friends; Scores range from 0 to 30, with higher scores representing more social engagement.

Lubben Social Network Scale-6 6 item scale evaluating social engagement; Items assess social contact and support including family and friends; Scores range from 0 to 30, with higher scores representing more social engagement.

Lubben Social Network Scale-6 6 item scale evaluating social engagement; Items assess social contact and support including family and friends; Scores range from 0 to 30, with higher scores representing more social engagement.

De Jong Gierveld Loneliness Scale (Short - 6 items) will measure emotional and social loneliness; Scores range from 1-6. Higher scores indicate greater levels of loneliness.

De Jong Gierveld Loneliness Scale (Short - 6 items) will measure emotional and social loneliness; Scores range from 1-6. Higher scores indicate greater levels of loneliness.

De Jong Gierveld Loneliness Scale (Short - 6 items) will measure emotional and social loneliness; Scores range from 1-6. Higher scores indicate greater levels of loneliness.

De Jong Gierveld Loneliness Scale (Short - 6 items) will measure emotional and social loneliness; Scores range from 1-6. Higher scores indicate greater levels of loneliness.

De Jong Gierveld Loneliness Scale (Short - 6 items) will measure emotional and social loneliness; Scores range from 1-6. Higher scores indicate greater levels of loneliness.

De Jong Gierveld Loneliness Scale (Short - 6 items) will measure emotional and social loneliness; Scores range from 1-6. Higher scores indicate greater levels of loneliness.

Geriatric Depression Scale-Short Form -15 items measuring emotional well-being; scores range from 0-15; Scores under 5 indicate that depression is unlikely, scores of 5 or more suggest depression.

Geriatric Depression Scale-Short Form -15 items measuring emotional well-being; scores range from 0-15; Scores under 5 indicate that depression is unlikely, scores of 5 or more suggest depression.

Geriatric Depression Scale-Short Form -15 items measuring emotional well-being; scores range from 0-15; Scores under 5 indicate that depression is unlikely, scores of 5 or more suggest depression.

Geriatric Depression Scale-Short Form -15 items measuring emotional well-being; scores range from 0-15; Scores under 5 indicate that depression is unlikely, scores of 5 or more suggest depression.

Geriatric Depression Scale-Short Form -15 items measuring emotional well-being; scores range from 0-15; Scores under 5 indicate that depression is unlikely, scores of 5 or more suggest depression.

Geriatric Depression Scale-Short Form -15 items measuring emotional well-being; scores range from 0-15; Scores under 5 indicate that depression is unlikely, scores of 5 or more suggest depression.

Pleasant Events Schedule: Alzheimer's Disease (AD) short form - 20 activity items measured on a scale divided into two parts. The first part of the scale measures frequency of participation and availability of the event (ltems are rated from 0 to 2; total scores can range from 0 to 40). The second part of the scale assesses current and/or past enjoyment of those activities (ltems are rated from 0 to 1; total scores can range from 0 to 20). Higher scores indicate higher levels of activity on both subscales.

Pleasant Events Schedule: Alzheimer's Disease (AD) short form - 20 activity items measured on a scale divided into two parts. The first part of the scale measures frequency of participation and availability of the event (ltems are rated from 0 to 2; total scores can range from 0 to 40). The second part of the scale assesses current and/or past enjoyment of those activities (ltems are rated from 0 to 1; total scores can range from 0 to 20). Higher scores indicate higher levels of activity on both subscales.

Pleasant Events Schedule: Alzheimer's Disease (AD) short form - 20 activity items measured on a scale divided into two parts. The first part of the scale measures frequency of participation and availability of the event (ltems are rated from 0 to 2; total scores can range from 0 to 40). The second part of the scale assesses current and/or past enjoyment of those activities (ltems are rated from 0 to 1; total scores can range from 0 to 20). Higher scores indicate higher levels of activity on both subscales.

Pleasant Events Schedule: Alzheimer's Disease (AD) short form - 20 activity items measured on a scale divided into two parts. The first part of the scale measures frequency of participation and availability of the event (ltems are rated from 0 to 2; total scores can range from 0 to 40). The second part of the scale assesses current and/or past enjoyment of those activities (ltems are rated from 0 to 1; total scores can range from 0 to 20). Higher scores indicate higher levels of activity on both subscales.

Pleasant Events Schedule: Alzheimer's Disease (AD) short form - 20 activity items measured on a scale divided into two parts. The first part of the scale measures frequency of participation and availability of the event (ltems are rated from 0 to 2; total scores can range from 0 to 40). The second part of the scale assesses current and/or past enjoyment of those activities (ltems are rated from 0 to 1; total scores can range from 0 to 20). Higher scores indicate higher levels of activity on both subscales.

Pleasant Events Schedule: Alzheimer's Disease (AD) short form - 20 activity items measured on a scale divided into two parts. The first part of the scale measures frequency of participation and availability of the event (ltems are rated from 0 to 2; total scores can range from 0 to 40). The second part of the scale assesses current and/or past enjoyment of those activities (ltems are rated from 0 to 1; total scores can range from 0 to 20). Higher scores indicate higher levels of activity on both subscales.

Telephone Montreal Cognitive Assessment (T-MoCA) - measure assessing 8 areas of cognition used over the phone to screen for Mild Cognitive Impairment; scores range from 0-22; with higher scores indicating better cognitive functioning. Scores 18 or below suggest mild cognitive dysfunction.

Telephone Montreal Cognitive Assessment (T-MoCA) - measure assessing 8 areas of cognition used over the phone to screen for Mild Cognitive Impairment; scores range from 0-22; with higher scores indicating better cognitive functioning. Scores 18 or below suggest cognitive dysfunction.

Telephone Montreal Cognitive Assessment (T-MoCA) - measure assessing 8 areas of cognition used over the phone to screen for Mild Cognitive Impairment; scores range from 0-22; with higher scores indicating better cognitive functioning. Scores 18 or below suggest mild cognitive dysfunction.

Telephone Montreal Cognitive Assessment (T-MoCA) - measure assessing 8 areas of cognition used over the phone to screen for Mild Cognitive Impairment; scores range from 0-22; with higher scores indicating better cognitive functioning. Scores 18 or below suggest mild cognitive dysfunction.

Telephone Montreal Cognitive Assessment (T-MoCA) - measure assessing 8 areas of cognition used over the phone to screen for Mild Cognitive Impairment; scores range from 0-22; with higher scores indicating better cognitive functioning. Scores 18 or below suggest mild cognitive dysfunction.

Telephone Montreal Cognitive Assessment (T-MoCA) - measure assessing 8 areas of cognition used over the phone to screen for Mild Cognitive Impairment; scores range from 0-22; with higher scores indicating better cognitive functioning. Scores 18 or below suggest mild cognitive dysfunction.

Fifteen item scale created from Katz Activities of Daily Living- 6 item scale measuring ability to perform activities of daily living, 8 items from the Lawton Independent Activities of Daily Living scale assessing 8 domains of independent living skills (including shopping and taking medications) and 1 item on hygiene from the Routine Task Inventory; Scores range from 0-30 with higher scores needing more help with ADL/IADLs.

Fifteen item scale created from Katz Activities of Daily Living- 6 item scale measuring ability to perform activities of daily living, 8 items from the Lawton Independent Activities of Daily Living scale assessing 8 domains of independent living skills (including shopping and taking medications) and 1 item on hygiene from the Routine Task Inventory; Scores range from 0-30 with higher scores needing more help with ADL/IADLs.

Fifteen item scale created from Katz Activities of Daily Living- 6 item scale measuring ability to perform activities of daily living, 8 items from the Lawton Independent Activities of Daily Living scale assessing 8 domains of independent living skills (including shopping and taking medications) and 1 item on hygiene from the Routine Task Inventory; Scores range from 0-30 with higher scores needing more help with ADL/IADLs.

Fifteen item scale created from Katz Activities of Daily Living- 6 item scale measuring ability to perform activities of daily living, 8 items from the Lawton Independent Activities of Daily Living scale assessing 8 domains of independent living skills (including shopping and taking medications) and 1 item on hygiene from the Routine Task Inventory; Scores range from 0-30 with higher scores needing more help with ADL/IADLs.

Fifteen item scale created from Katz Activities of Daily Living- 6 item scale measuring ability to perform activities of daily living, 8 items from the Lawton Independent Activities of Daily Living scale assessing 8 domains of independent living skills (including shopping and taking medications) and 1 item on hygiene from the Routine Task Inventory; Scores range from 0-30 with higher scores needing more help with ADL/IADLs.

Fifteen item scale created from Katz Activities of Daily Living- 6 item scale measuring ability to perform activities of daily living, 8 items from the Lawton Independent Activities of Daily Living scale assessing 8 domains of independent living skills (including shopping and taking medications) and 1 item on hygiene from the Routine Task Inventory; Scores range from 0-30 with higher scores needing more help with ADL/IADLs.

US Health Interview Survey - assesses engagement in physical activities in the prior two weeks. A composite index of physical activity is computed by summing the products of the number of minutes in each activity (9 are listed and there is an open response "other" option) and how many times in the past two weeks the engaged in the activity for the 9 activities and any open response activities, the total number of minutes during the past 2 weeks is divided by 60 minutes, and then by 2, to determine the number of hours of physical activity per week. The minimum composite index is 0. A higher composite index indicates more physical activity.

US Health Interview Survey - assesses engagement in physical activities in the prior two weeks. A composite index of physical activity is computed by summing the products of the number of minutes in each activity (9 are listed and there is an open response "other" option) and how many times in the past two weeks the engaged in the activity for the 9 activities and any open response activities, the total number of minutes during the past 2 weeks is divided by 60 minutes, and then by 2, to determine the number of hours of physical activity per week. The minimum composite index is 0. A higher composite index indicates more physical activity.

US Health Interview Survey - assesses engagement in physical activities in the prior two weeks. A composite index of physical activity is computed by summing the products of the number of minutes in each activity (9 are listed and there is an open response "other" option) and how many times in the past two weeks the engaged in the activity for the 9 activities and any open response activities, the total number of minutes during the past 2 weeks is divided by 60 minutes, and then by 2, to determine the number of hours of physical activity per week. The minimum composite index is 0. A higher composite index indicates more physical activity.

US Health Interview Survey - assesses engagement in physical activities in the prior two weeks. A composite index of physical activity is computed by summing the products of the number of minutes in each activity (9 are listed and there is an open response "other" option) and how many times in the past two weeks the engaged in the activity for the 9 activities and any open response activities, the total number of minutes during the past 2 weeks is divided by 60 minutes, and then by 2, to determine the number of hours of physical activity per week. The minimum composite index is 0. A higher composite index indicates more physical activity.

US Health Interview Survey - assesses engagement in physical activities in the prior two weeks. A composite index of physical activity is computed by summing the products of the number of minutes in each activity (9 are listed and there is an open response "other" option) and how many times in the past two weeks the engaged in the activity for the 9 activities and any open response activities, the total number of minutes during the past 2 weeks is divided by 60 minutes, and then by 2, to determine the number of hours of physical activity per week. The minimum composite index is 0. A higher composite index indicates more physical activity.

US Health Interview Survey - assesses engagement in physical activities in the prior two weeks. A composite index of physical activity is computed by summing the products of the number of minutes in each activity (9 are listed and there is an open response "other" option) and how many times in the past two weeks the engaged in the activity for the 9 activities and any open response activities, the total number of minutes during the past 2 weeks is divided by 60 minutes, and then by 2, to determine the number of hours of physical activity per week. The minimum composite index is 0. A higher composite index indicates more physical activity.

8 items based on Kanter et al., 2007 behavioral activation for depression scale. 1 item developed and added per researcher discretion. Responses range from 0 (meaning not at all) to 6 (meaning completely). Two items are reverse coded. Scores at each time point will be averaged.

8 items based on Kanter et al., 2007 behavioral activation for depression scale. 1 item developed and added per researcher discretion. Responses range from 0 (meaning not at all) to 6 (meaning completely). Two items are reverse coded. Scores at each time point will be averaged.

8 items based on Kanter et al., 2007 behavioral activation for depression scale. 1 item developed and added per researcher discretion. Responses range from 0 (meaning not at all) to 6 (meaning completely). Two items are reverse coded. Scores at each time point will be averaged.

8 items based on Kanter et al., 2007 behavioral activation for depression scale. 1 item developed and added per researcher discretion. Responses range from 0 (meaning not at all) to 6 (meaning completely). Two items are reverse coded. Scores at each time point will be averaged.

8 items based on Kanter et al., 2007 behavioral activation for depression scale. 1 item developed and added per researcher discretion. Responses range from 0 (meaning not at all) to 6 (meaning completely). Two items are reverse coded. Scores at each time point will be averaged.

8 items based on Kanter et al., 2007 behavioral activation for depression scale. 1 item developed and added per researcher discretion. Responses range from 0 (meaning not at all) to 6 (meaning completely). Two items are reverse coded. Scores at each time point will be averaged.

10-item yes or no checklist developed based on Kasper et al., 2015. 1 additional open-ended item is added to ask about other forms of unpaid social support. The total number of yes responses for each participant will be summed at each time point.

10-item yes or no checklist developed based on Kasper et al., 2015. 1 additional open-ended item is added to ask about other forms of unpaid social support. The total number of yes responses for each participant will be summed at each time point.

10-item yes or no checklist developed based on Kasper et al., 2015. 1 additional open-ended item is added to ask about other forms of unpaid social support. The total number of yes responses for each participant will be summed at each time point.

10-item yes or no checklist developed based on Kasper et al., 2015. 1 additional open-ended item is added to ask about other forms of unpaid social support. The total number of yes responses for each participant will be summed at each time point.

10-item yes or no checklist developed based on Kasper et al., 2015. 1 additional open-ended item is added to ask about other forms of unpaid social support. The total number of yes responses for each participant will be summed at each time point.

10-item yes or no checklist developed based on Kasper et al., 2015. 1 additional open-ended item is added to ask about other forms of unpaid social support. The total number of yes responses for each participant will be summed at each time point.

12-item measure assessing the utilization of paid community-based, residential, or other services. Response options include "I use this service," "I would like to use this service," and "I don't need to use this service." The number of services used will be summed at each time point for each participant.

12-item measure assessing the utilization of paid community-based, residential, or other services. Response options include "I use this service," "I would like to use this service," and "I don't need to use this service." The number of services used will be summed at each time point for each participant.

12-item measure assessing the utilization of paid community-based, residential, or other services. Response options include "I use this service," "I would like to use this service," and "I don't need to use this service." The number of services used will be summed at each time point for each participant.

12-item measure assessing the utilization of paid community-based, residential, or other services. Response options include "I use this service," "I would like to use this service," and "I don't need to use this service." The number of services used will be summed at each time point for each participant.

12-item measure assessing the utilization of paid community-based, residential, or other services. Response options include "I use this service," "I would like to use this service," and "I don't need to use this service." The number of services used will be summed at each time point for each participant.

12-item measure assessing the utilization of paid community-based, residential, or other services. Response options include "I use this service," "I would like to use this service," and "I don't need to use this service." The number of services used will be summed at each time point for each participant.