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Development of the Mental Clutter Scale – Source: Psychological Reports, Oct 2012

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[Note: For background on trials involving the cognition and clarity measures Leavitt and Katz developed with a focus on assessing fibromyalgia patients’ cognitive functioning, click HERE.]

Mental fog is a core symptom of fibromyalgia. Its definition and measurement are central to an understanding of fibromyalgia-related cognitive disability. The Mental Clutter Scale was designed to measure mental fogginess.

In an exploratory factor analysis of two different samples (number = 128 and number = 170), cognitive symptoms of fibromyalgia loaded on 2 dimensions: cognition and mental clarity.

The mental clarity factor comprised 8 items with factor loadings greater than .60 and was named the Mental Clutter Scale.

[Note: This measure involves patients self reporting on the frequency of 8 clarity/fog-related factors experienced in the past week, on a scale from 1 (not at all) to 10 (all the time). These factors are: ‘spaciness’, looking at life through a haze, confusion, cluttered thinking, fogginess, rushing thoughts, fuzzy headedness, and information overload.]

The factor stability of the new scale was good, internal consistency was .95, and test-retest reliability over a median of 5 days was .92.

The 8-item scale is a quick measure of mental fog that provides clinicians with information about cognitive functioning in fibromyalgia.

Source: Psychological Reports, Oct 2012;1`09(2):445-52. PMID:22238851, by Leavitt F, Katz RS. Department of Behavioral Sciences and Section of Rheumatology, Department of Internal Medicine, Rush Medical College, Chicago, Illinois, USA. [Email: frankleavitt@sbcglobal.net]

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2 thoughts on “Development of the Mental Clutter Scale – Source: Psychological Reports, Oct 2012”

  1. wellkid says:

    This abstract was obviously not written to be read by those with mental fog. I’m a biology professor and can hardly make sense of it on a good day!

    1. spiketheartist says:

      How do people get a copy of this test, does it cost money, and can it be self-administered and self-graded or must it be administered and interpreted by a psychologist?

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