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Date:         Thu, 13 Jul 2006 08:07:11 -0400
Reply-To:     "Dates, Brian" <>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         "Dates, Brian" <>
Subject:      Re: Likert scale
Content-Type: text/plain


With seven (7) response categories, you can probably treat the data as interval in nature. I'm a purist and my principal area of work is in measurement development and standardization, so I generally follow the IRT approach and then do the analysis on the IRT scaled items. Likert actually developed a scaling method for his approach to items which would be worth your time for future endeavors. As part of your analysis, I would recommend at least performing a reliability analysis to check for internal consistency and the relationship of the items to total score, so you can identify any "clinker" items that might exist. Good luck.


Brian G. Dates, Director of Quality Assurance Southwest Counseling and Development Services 1700 Waterman Detroit, Michigan 48209 Telephone: 313.841.7442 FAX: 313.841.4470 email:

> -----Original Message----- > From: Dominic Fernandes [] > Sent: Thursday, July 13, 2006 4:45 AM > To: SPSSX-L@LISTSERV.UGA.EDU > Subject: Likert scale > > Hi All, > > I have a question. How do we analyze a Likert scale (consisting of 7 > responses) course evaluation questionnaire given to 25 teachers who > attended an in-service course? Shall we treat the responses as scale > variables and use parametric tests or shall we treat the responses as > ordinal variables and use the nonparametric test. > > Thank you in advance for your assistance. > > Dominic. > > Confidentiality Notice for Email Transmissions: The information in this message is confidential and may be legally privileged. It is intended solely for the addressee. Access to this message by anyone else is unauthorised. If you are not the intended recipient, any disclosure, copying, or distribution of the message, or any action or omission taken by you in reliance on it, is prohibited and may be unlawful. Please immediately

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