Caregivers re-read modules on Alzheimer's Disease or related dementias (ADRD) in a webpage format, as would be available from online resources (e.g., National Institutes of Health) to mirror how most caregivers obtain information.

The E-health Literacy Scale (eHEALS) Norman & Skinner, 2006 will be administered to assess perceived skills and comfort related to using internet resources for acquiring health knowledge. The scale includes 10 questions (e.g., I can tell high quality from low quality health resources on the internet). Questions require responding on a Likert sale ranging from 1 to 5 (1-strongly disagree, 2- disagree, 3-undecided, 4-agree, 5-strongly agree; 1-not useful at all, 2-not useful, 3-unsure, 4-useful, 5-very useful; or 1-not important at all, 2-not important, 3-unsure, 4-important, 5-very important). Composite scores will be calculated with higher scores indicate higher e-health literacy.

Perceptual speed will be measured with the Letter Comparison Test and Pattern Comparison Test (Salthouse, 1993). The Letter Comparison Test involves 21 letter string pairs to be judged as the same or different. The Pattern Comparison Test involves 30 line patterns to be judged as the same or different. For both comparison tests, participants are given 24 seconds per test to complete as many items as possible, and performance is calculated as the number of items correct. Performance on each test will be calculated as the number of items correct, and a composite score will be calculated per participant.

Non-verbal fluid intelligence will be assessed with a computerized version of Raven's progressive matrices (Raven, et al., 1998). Participants will complete 18 trials in ascending order in trial normative difficulty (Ariel, Babineau, & Tauber, 2023; adapted from Stanovich & Cunningham, 1993). For each trial, a 3 x 3 array will be displayed with 8 geometric figures. The 9th position in the bottom right-hand corner will be empty. Participants will be given 8 geometric figures from which to choose to correctly complete the array. Participants will be given 10 minutes to complete as many trials as possible. Performance will be calculated as the total number of trials correct.

General knowledge will be assessed using a common measure of general knowledge in cognitive aging research, the Advanced Vocabulary Test I-v-4 (Ekstrom et al., 1976). Participants will be presented with a series of words and required to select the synonym for each word out of five options. Participants are given 4 min per task to complete as many words as possible (36 total problems, 8 min total). The self-paced vocabulary test is presented in a fixed order, and no feedback is provided. Performance is calculated as the number of items correct while adjusting for guessing (i.e., number of items correct - (.2 * number of items incorrect)).

Participants will complete the Medical Term Recognition Test (METER, Rawson et al., 2010). The METER is completed on paper. A list of 40 medical words and 40 nonwords are presented. Participants read the list of items and select the ones that they recognize as real words. Participants are instructed not to guess and to only select items they are sure were real words. Performance on the METER is calculated as the number of words correctly recognized.

The Alzheimer's Disease Knowledge Scale (ADKS, Carpenter et al., 2009) will be administered, and scale composite score will be calculated. The ADKS is a 30-item true/false that has been adapted cross-culturally and used to estimate knowledge of people with varying expertise in Alzheimer's Disease. It includes 4 symptom statements (e.g., Tremor or shaking of the hands or arms is a common symptom in people with AD - False), 5 caregiving statements (e.g., People with AD do best with simple instructions giving one step at a time - True), and 4 treatment and management statements (e.g., Poor nutrition can make the symptoms of AD worse - True). Participants respond by indicating true, false, or don't know.

Caregivers' performance during learning will be defined as the percent correct on retrieval practice trials. Specifically, caregivers will respond to multiple choice questions during learning when engaging in retrieval practice, and learning progress will be quantified by aggregating responses across items for each block. Each multiple choice question will have 1 correct answer and 3 incorrect lures, and responses will be scored as 1 (correct) or 0 (incorrect) and then aggregated per participant. This is a quantitative measure that is standard in the science of learning and for which no validated scale is available. Performance on retrieval practice trials for the will be evaluated with item-level analysis (to explore content difficulty) and across each learning block to establish participants' rate-of-learning.

The Perceived Usefulness (PU), Ease of Use (PEUO), Enjoyment (PNJ), Behavioral Intentions (BI), Relevance, and Output Quality (OUT) subscales of the Technology Acceptance Model (TAM) 3 scale (Venkatesh & Bala, 2008) will be administered, and scale composite score will be calculated. The subscales include 3 to 4 items. An example item from the Ease of Use scale is, "I find this system easy to use." An example item from the Enjoyment scale is, "The actual process of using the system is pleasant." Questions will be adapted for our sample. For instance, questions like, "Using the system improves my performance in my job", will be altered to read, "Using the program improves my ability to manage symptoms for an individual living with dementia." Responses to all questions will be made on a 7-point Likert scale from strongly disagree to strongly agree.

The behavioral and psychological symptoms experienced by the person living with dementia will be rated by the caregiver participants using the updated version of the Neuropsychiatric Inventory Questionnaire (NPI-Q; Cummings et al., 1994; Resnick et al., 2024; Resnick et al., 2021). This measure includes 12 items that the participant will rate on presence (yes vs. no), severity (1 = mild, 2 = moderate, 3 = severe), and distress (1 = not distressing at all to 5 = extremely distressing). Perceived symptom severity will be measured twice applying a pre-test post-test design.

Age, gender, education level, race/ethnicity, first generation status, member of an underrepresented group, native language, socioeconomic status, occupation, zip code, relationship with individual living with Alzheimer's Disease or a related dementia (e.g., child, spouse), caregiving status and duration of caregiving, and information seeking about dementia and caregiving.

Caregivers will self-report co-morbid medical conditions for the PLwD, and will report medication use, rating of health, hospitalizations, access to health insurance for the PLwD. Caregivers will be allowed to skip any questions they desire should they prefer not to report responses to any of these questions. No measurement scale will be used for these self-report questions. Instead, these brief questions are intended to obtain general health information. Example questions include, "does the person have other chronic conditions?" "Does the person living with dementia take any prescription medications?" and "Have you gone to the hospital emergency room (ER) about the person living with dementia's health in the past year (12 months)?" Responses to these questions will be used for descriptive purposes to better understand the sample and will not be aggregated into one measure.