Differential Loneliness Scale – short student version

Abstract

The Differential Loneliness Scale – short student version (DLS-S) is a specialized psychological scale designed to measure the experience of loneliness across four distinct relational domains. Developed by Schmidt and Sermat (1983), this instrument moves beyond global measures of loneliness by differentiating deficits within specific social contexts, including family, friends, romantic/sexual partners, and larger group affiliation. The short student version contains 20 true/false items and is specifically tailored for administration within student populations to assess relationship quality and perceived social isolation. The differential approach allows researchers and clinicians to identify the specific social domains contributing most significantly to an individual’s subjective experience of isolation.

Keywords

Loneliness, Social Isolation, Differential Loneliness Scale, Psychometrics, Romantic Relationships, Family Relationships, Friendship, Group Affiliation, Student Version, Schmidt and Sermat.

Authors

Nancy Schmidt, Vello Sermat.

Purpose

The primary purpose of the Differential Loneliness Scale (DLS) is to provide a nuanced assessment of loneliness by recognizing that deficiencies in social relationships are often domain-specific rather than uniform across all social spheres. Unlike unidimensional scales, the DLS-S aims to pinpoint precisely where an individual experiences a lack of desired social connection or intimacy, providing a more detailed profile of social needs fulfillment.

This differential approach is crucial for both research and clinical application, allowing practitioners to understand whether the perceived isolation stems from issues within the immediate family unit (Fam), the lack of close confidants (Fr), difficulties in intimate relationships (R/S), or feelings of alienation from the broader community (Gr). By isolating these sources, interventions can be targeted more effectively toward improving relationship quality in the specific deficient domain.

Construct

The DLS-S measures the construct of differential loneliness, defined as the subjective distress resulting from a discrepancy between desired and achieved social relationships in specific domains. The underlying theoretical model posits that social needs are fulfilled through different types of relationships, and failure to meet these needs in one area does not necessarily imply failure in others. The scale breaks the overarching concept of loneliness into four measurable subconstructs:

• Romantic/Sexual Relationship Loneliness (R/S): Measures feelings of isolation or lack of intimacy within a spousal or romantic partnership.
• Friendship Loneliness (Fr): Measures the lack of close, supportive, and understanding friendships.
• Family Loneliness (Fam): Measures perceived distance, lack of closeness, or poor communication within the immediate family.
• Group/Community Loneliness (Gr): Measures the absence of a sense of belonging, shared views, or roots within the larger social community or neighborhood.

Validity

The original Differential Loneliness Scale, upon which this short student version is based, demonstrated strong initial evidence for construct validity, supporting the theoretical distinction between the four proposed subscales. This was established through factor analytic techniques confirming the independence of the relationship domains, suggesting that each subscale measures a unique aspect of social deficiency.

The scale was also shown to possess acceptable discriminant validity, as scores on the subscales correlated differentially with other established measures of social adjustment and well-being. For instance, R/S loneliness scores would be expected to correlate more strongly with measures of marital satisfaction than with measures of general community involvement. The short student version maintains this structural and conceptual integrity, designed to be a valid, condensed measure for student populations.

Reliability

The original research by Schmidt and Sermat (1983) reported acceptable to high levels of internal consistency reliability (typically measured using Cronbach’s alpha) for the full DLS, indicating that items within each subscale consistently measure their respective construct. High internal consistency is essential for this scale because it validates the distinct scoring of the four separate subscales (R/S, Fr, Fam, Gr).

While specific reliability coefficients for the 20-item short student version are not included in the provided source, the instrument is expected to retain sufficient reliability for research applications among student cohorts. Further psychometric studies, including test-retest reliability, would confirm the stability of these differential loneliness scores over time within the target population.

Factor Analysis

The development of the Differential Loneliness Scale was fundamentally guided by rigorous factor analysis, which aimed to empirically validate the conceptual framework of domain-specific loneliness. The analysis consistently revealed a multi-dimensional structure, confirming the existence of four distinct, though related, factors corresponding precisely to the relationship domains identified: Romantic/Sexual (R/S), Friendship (Fr), Family (Fam), and Group (Gr).

This four-factor solution provides the empirical foundation that separates the DLS from earlier, more generalized measures of loneliness. The items selected for the short student version were those with the highest factor loadings onto these four distinct components, ensuring that the shortened instrument retains the essential differential structure required for accurate domain assessment.

Instrument

Test Type: Psychological Scale; Self-report inventory.

Format: 20 items; Dichotomous (True/False).

Language Available: Original English.

Population Group: Non-clinical populations; Primarily academic/student cohorts.

Age Group: Adolescents and Young Adults (typically college/university students).

Population Details: Specifically adapted for use in academic settings, addressing the social context and relational stages common among students who may or may not be involved in a current romantic or marital relationship.

Test Methodology: Respondents mark ‘T’ (True) if the statement describes their situation, or ‘F’ (False) if it does not. If an item depicting a specific relationship (e.g., a current romantic relationship) is not applicable to the respondent, they are instructed to mark ‘F’. Scoring involves summing points, differentially weighted by item direction. Items without an asterisk are scored 1 point for ‘T’, and items with an asterisk are reverse-scored (1 point for ‘F’).

Keywords

DLS-S, Social Psychology, Relationship Quality, Isolation Assessment, Psychometric Instrument, True/False Scale, Relationship Deficits.

Authors

Author ORCID Identifier: Unknown

Affiliation Email addresses: [email protected] (Contact for Ronald Okada, York University, listed in source content)

Correspondence Address: Ronald Okada, Professor of Psychology, Department of Psychology, Faculty of Health, York University, Toronto, Ontario, Canada M3J 1P.

Permissions & Fee and Test Year

The original Differential Loneliness Scale was published in 1983 by Schmidt and Sermat in the Journal of Personality and Social Psychology. The short student version is derived from this instrument.

The scale items are typically available for use in non-commercial academic research settings, provided the original authors and publication are properly cited. For any commercial application, clinical use, or formal reproduction, users should seek permission directly from the authors or the copyright holder, the American Psychological Association (APA).

Reference’s

• Schmidt‚ N. & Sermat‚ V. (1983). Measuring loneliness in different relationships. Journal of Personality and Social Psychology‚ 44‚ 1038-1047.

Items of the Differential Loneliness Scale – short student version

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

Instructions: For each statement‚ decide whether it describes you or your situation or not. If it does seem to describe you or your situation‚ mark it TRUE (T). If not‚ mark it FALSE (F). If an item is not applicable to you because you are currently not involved in the situation it depicts‚ e.g.‚ a current romantic or marital relationship‚ then mark it FALSE (F).

Note: Scoring on the scale is determined in the following way: For items with no asterisk next to the item number‚ each marking of T (TRUE) is given one point. For items with an asterisk‚ each marking of F (FALSE) is given one point. The scale measures loneliness in four types of relationships‚ namely romantic/sexual relationships (R/S)‚ friendships (Fr)‚ relationships with family (Fam)‚ and relationships with larger groups (Gr).