ISA Engagement Scale

Abstract

The ISA Engagement Scale is a specialized psychometric properties instrument designed to measure the multifaceted nature of employee engagement within organizational settings. Developed by Soane, Truss, and colleagues in 2012, this scale conceptualizes engagement not merely as a unitary construct, but as a combination of three distinct yet interrelated dimensions: Intellectual, Social, and Affective engagement. The scale provides researchers and practitioners with a concise and validated tool for assessing how employees connect with their work cognitively, relationally, and emotionally. Its development aimed to address the limitations of earlier scales that often focused too heavily on only one or two facets of the engagement experience, thereby offering a more holistic perspective particularly relevant to the field of Human Resource Development (HRD).

Keywords

Employee Engagement, Intellectual Engagement, Social Engagement, Affective Engagement, Work Attitude, Organizational Psychology, Human Resource Development, Psychometrics, Job Satisfaction.

Authors

Soane, E., Truss, C., Alfes, K., Shantz, A., Rees, C., Gatenby, M.

Purpose

The primary purpose of the ISA Engagement Scale is the rigorous measurement and differentiation of the core components of employee engagement. It was developed to move beyond generalized measures of job satisfaction or commitment by specifically capturing the energy and focus employees direct toward their work across three critical domains.

By isolating these three dimensions—Intellectual, Social, and Affective—the scale enables organizations to diagnose specific areas where engagement strategies might be most effective. For instance, a low score in the Intellectual dimension suggests a need for interventions targeting focus and concentration, while a low Social score points toward issues related to team alignment and shared work values.

Construct

The ISA Engagement Scale measures the construct of Employee Engagement, defined as the degree to which an individual invests their cognitive, emotional, and social resources into their work performance. The scale is structured around a three-factor model:

• Intellectual Engagement: This dimension captures the cognitive investment an employee makes in their job, focusing on concentration, attention, and mental absorption in task performance.
• Social Engagement: This dimension reflects the relational investment, specifically measuring the extent to which an employee aligns with the values, goals, and attitudes of their colleagues and the organization.
• Affective Engagement: This dimension measures the emotional investment, encompassing feelings of enthusiasm, energy, and positive sentiment toward the job role and the organization.

Validity

The original development study for the ISA Engagement Scale (Soane et al., 2012) employed robust statistical methods to establish its validity. Evidence was gathered to support both the scale’s internal structure and its external relationships with other constructs.

Construct validity was assessed through confirmatory factor analysis (CFA), which typically confirmed the hypothesized three-factor structure (Intellectual, Social, Affective) as distinct yet correlated dimensions. Furthermore, convergent validity was established by demonstrating strong positive correlations between the ISA total score and established measures of job involvement and organizational commitment. Discriminant validity was confirmed by showing that the ISA scale was distinct from, though negatively correlated with, measures of burnout or cynicism.

Reliability

The reliability of the ISA Engagement Scale components is typically high, indicating strong internal consistency within each subscale. Reliability analysis generally involves calculating Cronbach’s alpha coefficients for the Intellectual, Social, and Affective subscales, as well as for the overall composite score.

In the seminal study, all three subscales typically reported alpha coefficients exceeding the standard threshold of 0.70, often ranging between 0.80 and 0.90, signifying excellent internal consistency. This high level of reliability ensures that the items within each dimension consistently measure the same underlying aspect of engagement, making the scale highly dependable for research applications.

Factor Analysis

The development of the ISA Engagement Scale utilized both Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA) to solidify its structure. Initial EFA helped refine the item pool and confirmed that the items naturally clustered into three distinct factors, corresponding to the Intellectual, Social, and Affective components.

The subsequent CFA confirmed the superiority of the three-factor model over a simpler, single-factor model of engagement. This result provided strong empirical support for the theoretical distinction between the three types of engagement, validating the scale as a multidimensional instrument capable of providing nuanced insights into employee behavior and attitude.

Instrument

Test Type: Self-report psychological inventory

Format: Nine items across three subscales, utilizing a Likert scale response format.

Language Available: Primarily English (as developed in the UK), though subsequent translations may exist for international HR research.

Population Group: Employees and workers across various industries and sectors.

Age Group: Adult working population (typically 18 years and older).

Population Details: Developed and validated using samples of general employees, suitable for organizational psychology and human resource management research.

Test Methodology: Respondents rate their level of agreement with each statement using a 7-point scale, ranging from 1= “strongly disagree” to 7= “strongly agree.” Scores for each subscale are calculated by summing or averaging the respective item scores. The overall engagement score is the mean of all nine items.

Keywords

Organizational Commitment, Job Involvement, Workforce Measurement, Human Resources, Psychometric Scale, Factor Analysis.

Authors

Author ORCID Identifier: Not provided in source content; requires external verification.

Affiliation Email addresses: Not provided in source content; generally associated with the authors’ academic institutions (e.g., King’s College London, or universities affiliated with the Human Resource Development International journal).

Correspondence Address: Not provided in source content; typically directed to the first author, Emma Soane.

Permissions & Fee and Test Year

The scale was first published in 2012. For academic research purposes, the scale is often available for use without charge, provided proper citation is given to the original article. Commercial application or use in proprietary organizational consulting tools generally requires seeking formal permission from the primary authors or the copyright holder (usually the journal publisher, Taylor & Francis).

Reference’s

Soane, E., Truss, C., Alfes, K., Shantz, A., Rees, C., & Gatenby, M. (2012). Development and application of a new measure of employee engagement: The ISA engagement scale. Human Resource Development International, 15(5), 529-547.

The original PDF of the study detailing the scale’s development can be downloaded here: https://pdfs.semanticscholar.org/79e4/26be8c410a46e43fc97ed543d714e16c96fd.pdf

Items of the ISA Engagement Scale

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

Intellectual

• I focus hard on my work.
• I concentrate on my work.
• I pay a lot of attention to my work.

Social

• I share the same work values as my colleagues.
• I share the same work goals as my colleagues.
• I share the same work attitudes as my colleagues.

Affective

• I feel positive about my work.
• I feel energetic in my work.
• I am enthusiastic in my work.

Scoring: 1= “strongly disagree” to 7= “strongly agree”