SOPI(Self-completed Occupational Performance Index)is a brief 9-item self-completed questionnaire developed to assess occupational participation from the individual’s perspective, with a focus on engagement in meaningful everyday occupations.
SOPI is used in occupational therapy, occupational science, rehabilitation, aging research, health-related quality of life research, well-being studies, and outcome evaluation.
Occupational participation in SOPI is defined as a state in which individuals are able to engage in meaningful activities in their lives, with a sense of control, balance among activities, and satisfaction with performance.
This concept corresponds to occupational performance in the Canadian Model of Occupational Performance (CMOP) and can also be positioned as participation influenced by personal factors within the framework of the International Classification of Functioning, Disability and Health (ICF).
この概念は,Canadian Model of Occupational Performance(CMOP)における作業遂行に対応するものであり,International Classification of Functioning, Disability and Health(ICF)の枠組みでは,個人因子の影響を受ける参加として位置づけることができます。
SOPI does not ask respondents to evaluate predetermined specific activities. Instead, it asks them to reflect on activities that are meaningful and important in their own lives.
SOPI consists of 9 items based on the combination of three occupational domains and three aspects of occupational participation.
SOPIは,3つの作業領域と3つの評価側面の組み合わせに基づく9項目から構成されています。
Occupational Domains|作業領域
SOPI assesses the following three occupational domains:
SOPIは,以下の3つの作業領域を評価します。
・Leisure|余暇活動
・Productivity|生産的活動
・Self-care|セルフケア
Aspects of Occupational Participation|作業参加の評価側面
Each occupational domain is evaluated from the following three aspects:
それぞれの作業領域について,以下の3側面から評価します。
・Control|作業の統制
・Balance|作業バランス
・Satisfaction|遂行満足度
In addition to the total SOPI score, domain scores and aspect scores can be calculated.
SOPIでは,合計点に加えて,領域別得点および側面別得点を算出できます。
For detailed scoring procedures, please refer to the Use & Scoring page.
採点方法の詳細については,「Use & Scoring|使用方法・採点」ページをご参照ください。
Conceptual Characteristics|概念的特徴
Focus on meaningful occupations|意味のある作業への焦点
SOPI focuses on activities that are meaningful and important to each individual, rather than on predetermined specific activities or activity frequency alone.
SOPI is based on the individual’s subjective evaluation of their own occupational participation in daily life.
SOPIは,日々の生活における作業参加について,本人自身の主観的評価に基づいています。
Multidimensional understanding of occupational participation|作業参加の多面的理解
SOPI understands occupational participation through three occupational domains—leisure, productivity, and self-care—and three aspects—control, balance, and satisfaction.
SOPI is conceptually related to occupational performance in occupational therapy models, including the Canadian Model of Occupational Performance (CMOP), and can be understood within the broader framework of participation in the ICF.
SOPIは,Canadian Model of Occupational Performance(CMOP)などの作業療法モデルにおける作業遂行と概念的に関連しており,ICFにおける参加の枠組みの中でも理解できます。
Research Significance|研究上の意義
Robust structure across studies|複数の研究で再現された頑強な構造
The structure of SOPI has been examined in multiple studies, and its multidimensional structure has been repeatedly supported across different samples and research contexts.
This repeated support suggests that SOPI provides a robust framework for assessing occupational participation through three occupational domains and three aspects.
Use in postal surveys and epidemiological research|郵送調査・疫学研究での利用
Because SOPI is brief and self-completed, it can be used not only in face-to-face assessment but also in postal surveys and large-scale questionnaire studies.
This feature has made it possible to study occupational participation epidemiologically and to examine its associations with health, well-being, quality of life, depression, social participation, aging, and rehabilitation outcomes.
The reliability and validity of SOPI have been examined in studies involving different populations, including community-dwelling adults, university students, and individuals receiving rehabilitation services.
Previous studies have supported the usefulness of SOPI as a measure of occupational participation, including evidence related to internal consistency and factor structure.