MO-index, a transformed score to present and compare results of Likert response format scales

Goh, Hong Eng (2011) MO-index, a transformed score to present and compare results of Likert response format scales. In: 46th Australian Psychological Society Annual Conference 2011, 4-8 Oct 2011, Canberra, Australia.


Evaluation of employees' opinions about work-related issues is commonly practised in organisations. Regardless of whether the surveys are conducted on a large-scale, e.g., organisation wide, or on a smallscale, e.g., work area, the mainstay is to develop initiatives to address challenges and build on achievements so as to benefit both the employees and the organisation. With resources invested in
action plans to address problematic areas, organisations look for meaningful interpretation and maximum information from surveys, using follow-up surveys to facilitate better informed decision-making by management. The main focus of this paper was to address how best to accurately communicate results and assess change in scores. The Likert response format (e.g., 5-point ranging from strongly disagree to strongly agree) and summated scales are commonly used in surveys. The coding of Likert responses
from the items with sequential integers and then summating them to produce a raw score percentage is widely practised as a means of presenting results and the comparison of scores from different survey cycles to employees and management. However, percentage scores are not interval measurement, which makes comparisons between scores (e.g., from two survey periods or two measures) inaccurate. It is
proposed that there is a vast improvement in the interpretability of change scores when organisations adopt the MO-Index, a transformed score. It applies the log of odd ratios of the percentage of cumulative item endorsement to an inventory with a Likert response format to transform scores into an interval scale of logits. The interpretation of logits was made more meaningful and comprehensible to all stakeholders through the linear transformation of logits to a scale of Outcome Units that ranged from +100 to -100.

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Poster)
Refereed: Yes
Item Status: Live Archive
Additional Information: This is a poster paper. Not reportable. The author/s will retain copyright of their abstract, in addition to the moral rights they are entitled to as author/s of the abstract. The Australian Psychological Society Ltd does not hold copies of any papers presented at conferences. A formal paper was not produced for publication in the conference proceedings as the APS conference organisers decided not to offer this in 2011.
Faculty/School / Institute/Centre: Historic - Faculty of Sciences - Department of Psychology (Up to 30 Jun 2013)
Faculty/School / Institute/Centre: Historic - Faculty of Sciences - Department of Psychology (Up to 30 Jun 2013)
Date Deposited: 04 Jun 2012 07:53
Last Modified: 10 Jul 2017 03:32
Uncontrolled Keywords: surveys; survey interpretation; workplace; decision making; management
Fields of Research (2008): 17 Psychology and Cognitive Sciences > 1701 Psychology > 170107 Industrial and Organisational Psychology
20 Language, Communication and Culture > 2001 Communication and Media Studies > 200105 Organisational, Interpersonal and Intercultural Communication
15 Commerce, Management, Tourism and Services > 1503 Business and Management > 150305 Human Resources Management
Fields of Research (2020): 52 PSYCHOLOGY > 5201 Applied and developmental psychology > 520104 Industrial and organisational psychology (incl. human factors)
47 LANGUAGE, COMMUNICATION AND CULTURE > 4701 Communication and media studies > 470108 Organisational, interpersonal and intercultural communication
35 COMMERCE, MANAGEMENT, TOURISM AND SERVICES > 3505 Human resources and industrial relations > 350503 Human resources management
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970117 Expanding Knowledge in Psychology and Cognitive Sciences

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