{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,25]],"date-time":"2026-09-25T16:55:17Z","timestamp":1790355317933,"version":"4.1.0"},"reference-count":26,"publisher":"JMIR Publications Inc.","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JMIR Res Protoc"],"abstract":"\n Background<\/jats:title>\n Anhedonia is a core symptom of depressive disorders. Although group-level cutoff points for the Snaith\u2013Hamilton Pleasure Scale (SHAPS) are established, real-time, individual-level monitoring remains limited. Ecological momentary assessment (EMA) enables high-frequency sampling, and simple moving averages (SMA; 7\/14\/30 days) offer an interpretable way to smooth daily signals and surface early-warning trends.<\/jats:p>\n <\/jats:sec>\n \n Objective<\/jats:title>\n The aim of this study was to develop and validate a cross-device platform that collects EMA-based SHAPS responses and visualizes SMA trends for individual anhedonia monitoring. This part I protocol focuses on platform design, feasibility, usability, data quality, and initial analytical validity to inform subsequent evaluation.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n We will conduct a single-arm methodological pilot in approximately 24 adults, recruited from an outpatient psychiatry clinic (clinical cohort) and a university setting (nonclinical cohort). After baseline assessment, participants will complete 30 days of daily EMA-SHAPS. Primary outcomes are feasibility (adherence, missingness patterns, timing fidelity) and usability\/face validity (eg, System Usability Scale, qualitative feedback). We will also describe expert content validity ratings for key visual elements and exploratory analytic checks of within-person variability and the descriptive behavior of 7\/14\/30-day moving averages; these analyses are not powered for confirmatory hypothesis testing.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n This protocol specifies the design\u2013validate sequence, recruitment procedures, and predefined adherence and missing-data rules for computing moving averages. Recruitment for the year-1 feasibility pilot is scheduled to begin in March 2026 following institutional review board approval (approval 114006; approval date: June 10, 2025), with feasibility metrics, usability indices, and parameter estimates used to refine alert logic and power calculations for a planned part II evaluation.<\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n Combining EMA-SHAPS with SMA-based trend visualizations may provide an interpretable way to summarize daily anhedonia signals and generate candidate early-warning indicators. This methodological pilot will deliver feasibility, usability, and preliminary analytic parameters needed to support a subsequent controlled evaluation of the platform\u2019s clinical utility.<\/jats:p>\n <\/jats:sec>\n \n International Registered Report Identifier (IRRID)<\/jats:title>\n PRR1-10.2196\/84024<\/jats:p>\n <\/jats:sec>","DOI":"10.2196\/84024","type":"journal-article","created":{"date-parts":[[2025,12,5]],"date-time":"2025-12-05T14:00:07Z","timestamp":1764943207000},"page":"e84024","source":"Crossref","is-referenced-by-count":1,"title":["Development and Validation of a Cross-Device Platform for Anhedonia Trend Visualization by Using Ecological Momentary Assessment and Moving Averages (Part I): Protocol for a Methodological Pilot Study"],"prefix":"10.2196","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0028-1549","authenticated-orcid":false,"given":"Yen-Chung","family":"Ho","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-4809-9739","authenticated-orcid":false,"given":"Chia-Ling","family":"Fang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0001-1887-7797","authenticated-orcid":false,"given":"Yung-Chieh","family":"Ching","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8544-0712","authenticated-orcid":false,"given":"Hsiu-Ju","family":"Chang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8291-0603","authenticated-orcid":false,"given":"Jiun-Yi","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7305-3061","authenticated-orcid":false,"given":"Charles CN","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1010","published-online":{"date-parts":[[2025,12,18]]},"reference":[{"key":"ref1","unstructured":"Depressive disorder (depression)World Health Organization20258292025-12-15https:\/\/www.who.int\/news-room\/fact-sheets\/detail\/depression"},{"key":"ref2","year":"2022","journal-title":"Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR)"},{"key":"ref3","doi-asserted-by":"publisher","DOI":"10.1146\/annurev-clinpsy-050212-185606"},{"key":"ref4","doi-asserted-by":"publisher","DOI":"10.1192\/bjp.167.1.99"},{"key":"ref5","doi-asserted-by":"publisher","DOI":"10.1016\/j.jad.2006.08.020"},{"key":"ref6","doi-asserted-by":"publisher","DOI":"10.1186\/1471-244X-12-184"},{"key":"ref7","doi-asserted-by":"publisher","DOI":"10.1192\/bjo.2024.35"},{"key":"ref8","doi-asserted-by":"publisher","DOI":"10.1136\/bmj.324.7347.1193"},{"key":"ref9","doi-asserted-by":"publisher","DOI":"10.1146\/annurev.clinpsy.3.022806.091415"},{"key":"ref10","doi-asserted-by":"publisher","DOI":"10.1146\/annurev-clinpsy-050212-185510"},{"key":"ref11","doi-asserted-by":"publisher","DOI":"10.1002\/wps.20513"},{"key":"ref12","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.1312114110"},{"key":"ref13","doi-asserted-by":"publisher","DOI":"10.1017\/s0033291721005183"},{"key":"ref14","doi-asserted-by":"publisher","DOI":"10.1177\/21677026221137006"},{"key":"ref15","author":"Oppenheim, A","year":"2010","journal-title":"Discrete-Time Signal Processing 3rd edition"},{"key":"ref16","author":"Box, GEP","year":"2015","journal-title":"Time Series Analysis: Forecasting and Control"},{"key":"ref17","author":"Hyndman, RJ","year":"2021","journal-title":"Forecasting: Principles and Practice 3rd ed"},{"key":"ref18","doi-asserted-by":"publisher","DOI":"10.2307\/1269835"},{"key":"ref19","doi-asserted-by":"publisher","DOI":"10.1111\/j.1540-6261.1992.tb04681.x"},{"key":"ref20","doi-asserted-by":"publisher","DOI":"10.1111\/0022-1082.00265"},{"key":"ref21","doi-asserted-by":"publisher","DOI":"10.1186\/s12889-017-4372-y"},{"key":"ref22","doi-asserted-by":"publisher","DOI":"10.15585\/mmwr.mm7219e2"},{"key":"ref23","doi-asserted-by":"publisher","DOI":"10.1038\/npp.2016.7"},{"key":"ref24","doi-asserted-by":"publisher","DOI":"10.2196\/mental.5165"},{"key":"ref25","author":"Ho, YC","year":"2022","journal-title":"The psychometric properties of the Chinese version Snaith-Hamilton Pleasure Scale in Taiwan [theses] (forthcoming)"},{"key":"ref26","doi-asserted-by":"publisher","DOI":"10.1002\/pst.185"}],"container-title":["JMIR Research Protocols"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.researchprotocols.org\/2025\/1\/e84024","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,6,30]],"date-time":"2026-06-30T18:18:11Z","timestamp":1782843491000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.researchprotocols.org\/2025\/1\/e84024"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,12,18]]},"references-count":26,"URL":"https:\/\/doi.org\/10.2196\/84024","relation":{"has-preprint":[{"id-type":"doi","id":"10.2196\/preprints.84024","asserted-by":"object"}]},"ISSN":["1929-0748"],"issn-type":[{"value":"1929-0748","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,12,18]]}}}