Social Functioning Questionnaire (SFQ)

Abstract

The Social Functioning Questionnaire (SFQ) is a concise and robust psychological scale developed by P. Tyrer and colleagues in 2005. It serves as a rapid, self-report instrument designed to measure perceived social functioning across key areas of an individual’s life. Initially validated for use primarily in psychiatric populations, the SFQ provides a quick assessment of difficulties related to occupational performance, financial stability, intimate relationships, and leisure activities, making it highly valuable for clinical trials and routine outcome monitoring of treatment efficacy.

Keywords

Social functioning, SFQ, P. Tyrer, psychiatric assessment, self-report measure, quality of life, relational difficulties, perceived functioning, social disability.

Authors

Tyrer, P., Nur, U., Crawford, M., Karlsen, S., McLean, C., Rao, B., and Johnson, T.

Purpose

The primary purpose of the SFQ is to provide a highly efficient and easily administered instrument for measuring an individual’s perceived functioning in key social and occupational domains. It was specifically designed to be rapid and robust, allowing clinicians and researchers to quickly gauge the extent of social disability associated with various mental health conditions and to assess outcomes in clinical settings.

Unlike more extensive quality of life measures, the SFQ focuses explicitly on quantifying difficulties in performing routine tasks and maintaining satisfactory relationships. This concentration makes it particularly useful for monitoring treatment effectiveness and identifying concurrent social problems often overlooked in standard diagnostic procedures, reflecting the scale’s utility as a comprehensive yet brief screening tool.

Construct

The SFQ measures the construct of social functioning, which encompasses an individual’s ability to successfully fulfill expected social roles and maintain satisfactory interpersonal relationships. This construct is often described as the practical, observable outcome of mental health status, reflecting how well an individual adapts to their environment and handles daily demands.

The scale operationalizes social functioning across eight critical areas, including occupational performance (work and home tasks), financial stability, intimate and family relationships, sexual health, and emotional well-being (loneliness and leisure enjoyment). Difficulties in these areas reflect social disability, which P. Tyrer previously argued constituted a “hidden axis” requiring explicit measurement in psychiatry, particularly in patients with personality disorder.

Validity

The validity of the SFQ has been strongly supported by multiple studies, including its original validation in 2005. It demonstrated robust concurrent validity, correlating significantly with established, longer measures of social function and disability, such as the Social Adjustment Scale (SAS) and the Clinical Interview Schedule-Revised (CIS-R).

Furthermore, the SFQ exhibits excellent discriminant validity, showing clear differentiation between clinical groups and healthy controls. Crucially, it has been shown to be sensitive to change following therapeutic interventions, affirming its utility as an outcome measure in clinical trials focused on psychiatric treatments and overall recovery.

Reliability

The SFQ is noted for its high reliability, particularly in terms of internal consistency. In the original 2005 study, the measure demonstrated a strong Cronbach’s alpha, typically exceeding 0.80, indicating that the eight items consistently measure the same underlying construct of social disability. This level of internal consistency suggests that the scale is highly cohesive.

Test-retest reliability has also been confirmed as satisfactory, suggesting that the SFQ yields stable scores over short periods when the underlying clinical status of the respondent has not changed significantly. This stability reinforces its suitability for repeated administration in longitudinal studies and treatment outcome monitoring.

Factor Analysis

While the Social Functioning Questionnaire is typically scored as a single, unidimensional scale yielding one total score of perceived functioning, exploratory factor analyses often suggest a structure that reflects the division of daily life. Some research has indicated the presence of two primary factors: a factor related to Occupational and Financial Performance (items concerning work, tasks, and money) and a factor related to Interpersonal and Affective Functioning (items concerning relationships, loneliness, and leisure).

However, due to the brevity and strong internal consistency of the instrument, researchers generally recommend using the single total score for simplicity and clinical utility, where higher scores consistently reflect greater overall social impairment.

Instrument

Test Type: Self-report questionnaire / Psychological Scale

Format: 8 items utilizing a 4-point Likert-type scale (0 to 3). Scores are summed to generate a total score ranging from 0 (no problems) to 24 (severe problems). Items 1, 3, 4, and 8 are reverse-scored relative to the other items to ensure consistency in the scoring direction (higher score equals worse functioning).

Language Available: English (original); translations exist for various European and Asian languages due to its international adoption.

Population Group: Adults (clinical and non-clinical settings).

Age Group: 18 years and older.

Population Details: Primarily validated and utilized across diverse psychiatric populations, including individuals diagnosed with depression, anxiety disorders, and personality disorder. It is highly effective in measuring disability across the spectrum of common mental disorders.

Test Methodology: The scale is quick to administer (typically under five minutes). It is a rapid screening tool where the raw sum score is used directly to indicate the severity of perceived social dysfunction. No complex scoring algorithms are required.

Keywords

Outcome measure, clinical trial, social disability, perceived functioning, psychiatric assessment, rapid screening tool, mental health, occupational function.

Authors

Author ORCID Identifier: N/A (Not provided in source material)

Affiliation Email addresses: [email protected]

Correspondence Address: Correspondence is typically directed to Professor Peter Tyrer, Imperial College London, UK.

Permissions & Fee and Test Year

The primary validation and publication year for the current form of the scale is 2005 (Tyrer et al.). While the scale is often used freely in non-commercial academic and clinical settings, users should seek formal permission from the primary author, Professor P. Tyrer, for large-scale or commercial applications. No explicit fee structure is universally applied for standard clinical usage.

Reference’s

• Tyrer, P. (1990). Personality disorder and social functioning. In D. F. Peck and C.M. Shapiro (Eds.), Measuring Human Problems, a Practical Guide (pp. 119-142). Wiley, Chichester.
• Tyrer, P. (1993). Measurement of social function. In P. Tyrer & P. Casey (Eds.), Social function in psychiatry. The hidden axis of classification exposed (pp. 21-52). Petersfield, England: Wrightson Biomedical.
• Tyrer, P., Nur, U., Crawford, M., Karlsen, S., McLean, C., Rao, B., & Johnson, T. (2005). The Social Functioning Questionnaire: A rapid and robust measure of perceived functioning. International Journal of Social Psychiatry, 51, 265–275.
• Tyrer, Nur, Crawford, Karlsen, McLean, Rao, & Johnson. (2005). Social Functioning Questionnaire. In: Simmons C. A., Lehmann P. (eds). Tools for strengths-based assessment and evaluation, New York, NY: Springer, pp. 340-342. (2013). The instrument can be reviewed via Google Scholar.

Items of the Social Functioning Questionnaire (SFQ)

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

1. I complete my tasks at work and home satisfactorily.
   • Most of the time =0; Quite often =1; Sometimes =2; Not at all =3
2. I find my tasks at work and at home very stressful.
   • Most of the time =3; Quite often =2; Sometimes =1; Not at all =0
3. I have no money problems.
   • No problems at all =0; Slight worries only =1; Definite problems =2; Very severe problems =3
4. I have difficulties in getting and keeping close relationships.
   • Severe difficulties =0; Some problems =1; Occasional problems =2; No problems at all =3
5. I have problems in my sex life.
   • Severe problems =3; Moderate problems =2; Occasional problems =1; No problems at all =0
6. I get on well with my family and other relatives.
   • Yes, definitely =0; Yes, usually =1; No, some problems =2; No, severe problems =3
7. I feel lonely and isolated from other people.
   • Almost all the time =3; Much of the time =2; Not usually =1; Not at all =0
8. I enjoy my spare time.
   • Very much =0; Sometimes =1; Not often =2; Not at all =3