Brief Self-Compassion Inventory (BSCI)

Abstract

The Brief Self-Compassion Inventory (BSCI), developed by Chinh and colleagues in 2023, is a concise, 5-item rating scale designed to reliably measure the core components of self-compassion. This instrument operationalizes key facets including self-kindness, mindful acceptance, and common humanity. Its rigorous development followed principles derived from the Patient-Reported Outcomes Measurement Information System (PROMIS) framework, incorporating expert feedback and input from cancer patients.

Initial validation studies confirmed strong psychometric properties, including robust factor analysis and high internal consistency, primarily within a population of adults diagnosed with various cancers (e.g., breast, lung, gastrointestinal, prostate). The developers suggest further investigation across diverse medical and nonclinical groups to confirm the scale’s broader applicability.

Keywords

Self-Compassion Assessment, Self-Kindness, Mindful Acceptance, Mindfulness, State Trait Level Measures, Self-Regard, Self-Forgiveness, PROMIS, Oncology.

Authors

Chinh, Kelly; Wu, Wei; Johns, Shelley A.; Stutz, Patrick V.; McGrew, John H.; Mosher, Catherine E.

Purpose

The central objective of the Brief Self-Compassion Inventory (BSCI) is to serve as a highly efficient and psychometrically sound measure of self-compassion. This instrument is intended to be versatile for use in both rigorous academic research and practical clinical environments.

The BSCI facilitates the exploration of complex associations between an individual’s level of self-compassion and various markers of physical and mental health outcomes, particularly in populations facing significant health challenges, such as cancer patients.

Construct

The BSCI measures the psychological construct of self-compassion, which involves treating oneself with kindness, care, and understanding in the face of suffering or perceived inadequacy. Unlike traditional self-esteem measures, self-compassion emphasizes non-judgmental acceptance rather than positive self-evaluation.

Specifically, the 5-item scale captures three primary facets considered essential to the construct: Self-Kindness (being warm and supportive toward oneself), Mindful Acceptance (non-judgmentally observing painful thoughts and feelings), and Common Humanity (recognizing that suffering and personal failure are part of the shared human experience).

Validity

The validity of the BSCI was initially established through comprehensive psychometric testing. Construct Validity was demonstrated by examining the scale’s correlations with other psychological variables that are theoretically linked to self-compassion.

Expected relationships were observed between BSCI scores and measures of mindfulness, acceptance of illness (specifically cancer), and various positive coping strategies. These findings confirm the instrument’s ability to accurately measure the intended construct of self-compassion, distinguishing it effectively from related concepts.

Reliability

The reliability of the BSCI was assessed primarily through internal consistency, yielding excellent results. The calculated Cronbach’s alpha (α) was 0.90, and McDonald’s omega (ω) was also 0.90.

These high coefficients indicate a strong degree of interrelatedness among the five items, confirming that they consistently measure the same underlying construct. The internal consistency achieved suggests the BSCI is a highly stable and dependable measure of momentary self-compassion.

Factor Analysis

A single-factor structure was confirmed as the optimal model for the BSCI using Confirmatory Factor Analysis (CFA). This model demonstrated superior fit indices compared to alternative factor structures, with values including Standardized Root Mean Square Residual (SRMR) = 0.03, Comparative Fit Index (CFI) = 0.98, and Root Mean Square Error of Approximation (RMSEA) = 0.07. These metrics strongly support the unitary nature of the self-compassion construct measured by the inventory.

Furthermore, all standardized factor loadings for the individual items ranged robustly from 0.76 to 0.83, significantly exceeding the conventional threshold of 0.40. Crucially, testing for Measurement Invariance confirmed that the BSCI functions equivalently across different demographic and clinical subgroups, including patients of varying genders, cancer types, and stages of illness. This ensures the comparability of scores across diverse populations.

Instrument

Test Type: Original rating scale.

Format: The instrument consists of 5 positively worded items. Participants rate their experiences over the past two weeks using a 5-point Likert scale, where responses range from 1 = “not at all” to 5 = “very much.” Higher total scores signify greater levels of self-compassion.

Language Available: English.

Population Group: Human; Male; Female.

Age Group: Adulthood (18 years and older).

Population Details: The initial target population for validation was adults in the United States diagnosed with various forms of cancer, specifically breast, gastrointestinal, lung, or prostate cancer. Developers suggest testing in nonclinical populations is needed for broader generalization.

Test Methodology: The development and validation of the BSCI involved a comprehensive suite of psychometric analyses:

• Test Validity: Assessing the extent to which the test measures what it claims to measure.

• Construct Validity: Examining the theoretical relationships between the BSCI and other psychological variables.

• Test Reliability: Evaluating the consistency and stability of the test scores.

• Internal Consistency: Measuring the consistency of responses across items within the scale.

• Factor Analysis: Identifying the underlying structure of the items.

• Confirmatory Factor Analysis: Confirming the hypothesized factor structure of the scale.

• Measurement Invariance: Ensuring that the scale functions similarly across different groups.

Keywords

Self-Compassion Assessment, Self-Kindness, Mindful Acceptance, Psychometrics, Rating Scale, Oncology, PROMIS.

Authors

Chinh, Kelly; Wu, Wei; Johns, Shelley A.; McGrew, John H.; Mosher, Catherine E. (Affiliation: Department of Psychology, Indiana University-Purdue University Indianapolis)

Stutz, Patrick V. (Affiliation: Department of Medicine, Indiana University School of Medicine)

Author ORCID Identifier: http://orcid.org/0000-0003-2731-7641 (Patrick V. Stutz)

Affiliation Email addresses: [email protected] (Catherine E. Mosher)

Correspondence Address: [email protected] (Catherine E. Mosher)

Permissions & Fee and Test Year

The Brief Self-Compassion Inventory (BSCI) is available for use in academic research and teaching purposes without charge. Commercial use of the instrument is prohibited.

Commercial Use: No

Fee: No

Test Year: 2023

Permissions/License: The scale is licensed under the Creative Commons Attribution 4.0 International License: creativecommons.org/licenses/by/4.0/deed.en

Reference’s

Chinh, K., Wu, W., Johns, S. A., Stutz, P. V., McGrew, J. H., & Mosher, C. E. (2023). Development and preliminary validation of the Brief Self-Compassion Inventory. PLoS ONE, 18(5), Article e0285658. DOI: https://doi.org/10.1371/journal.pone.0285658

Items of the Brief Self-Compassion Inventory (BSCI)

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way.

The Brief Self-Compassion Inventory is a short, 5-item scale designed to quickly assess self-compassion. The specific items can be found in the foundational publication (Chinh et al., 2023, Table 2, Page 9).

Items are rated on a 5-point Likert scale, ranging from 1 = “not at all” to 5 = “very much.”

1. When I had difficult feelings, I realized that these feelings would change over time.

2. When I faced a challenge, I reminded myself that challenges are a part of every human life.

3. I recognized that my struggles are also experienced by others.

4. I was able to soothe myself during times of stress.

5. I accepted my painful thoughts and feelings as a natural part of life.