Living Memory Home-4-Dementia Care Pairs

The feasibility of the application will be measured by the number of times the participant logs in to the LMH-4-DCP web application. The minimum number of logins recommended to the participants is 6.

Participant retention, as an aspect of feasibility, will be measured by the recorded number of participants lost to follow-up. A number of the enrolled participants who the study team contacted three times, but did not answer or continue participation, will be recorded.

Participant retention, as an aspect of feasibility, will be measured by the recorded number of dropouts. A number of the participants who asked to withdraw/drop-out from the study after being enrolled will be recorded.

The feasibility of the application will be measured by the time spent in each activity. The time will be measured in minutes and seconds. For example, 5 minutes and 30 seconds.

The feasibility of the LMH-4-DCP study will be measured by the proportion of family caregivers who consent to participate among those who were invited and screened into the study.

The feasibility of the LMH-4-DCP study will be measured by the proportion of family caregivers who decline to participate among those who were invited and screened into the study.

The feasibility of the LMH-4-DCP study will be measured by the proportion of family caregivers who are deemed ineligible based on screening criteria among those who were invited to participate in the study.

The usability of the web application will be measured by the System Usability Scale (SUS). This scale is a 10-item assessment of the usability of a system, helping identify areas for improvement. Response options range from 1 - Strongly Disagree to 5 - Strongly Agree. Scores range from 0-100, with higher scores indicative of greater usability.

The acceptability of the LMH-4-DCP application was assessed among caregiver participants assigned to the intervention arm using a study-specific survey evaluating usability, engagement, acceptability, and suggestions for improvement. Participants rated their agreement with statements such as "I enjoyed my experience using the LMH-4-DCP application" on a five-point Likert scale ranging from 1 - Strongly Disagree to 5 - Strongly Agree. Total scores range from 8 to 40, with higher scores indicating greater satisfaction and acceptability of the intervention.

The acceptability of the web application will be measured by the use of open-ended items assessing usability, engagement, acceptability, suggestions for improvement. The intervention group participants will also be administered five open-ended qualitative items asking for feedback on LMH-4-DCP, including: "How was your overall experience using LMH-4-DCP?" and "Which LMH-4-DCP features did you find most valuable? Why?"

The caregivers' pre-loss grief is assessed using the validated 12-Item Prolonged Grief Revised (PG-12-R) Measure. Scores range from 12-60, with higher scores indicative of greater feelings of pre-loss grief.

The first measure of relationship quality will be the validated 6-item Relational Deprivation Scale, which measures the perceived loss of relationship as a result of the care-recipient's illness. Response options range from 1 - Not At All to 4 - Completely. Scores range from 6-24, with higher scores indicative of poorer relational quality.

The second measure of relationship quality will be the validated 15-item Mutuality Scale, which measures the extent of positive aspects of caregiving. Response options range from 0 - Not At All to 4 - A Great Deal. Scores range from 0-60, with higher scores reflecting greater levels of mutuality.

The third measure of relationship quality will be the 8-item validated Relationship Rewards Scale (RRS) instrument, which includes two subscales assessing caregivers' perceptions of relationship quality prior to the care-recipient's diagnosis ("pre-illness") and at the current time ("current relationship"). Responses range from 1 - Never to 4 - Always. Scores for each subscale range from 4-16, with higher scores indicating greater perceived relationship quality.