Mental component score

The SF36 (8) has eight component scores labeled physical function, physical role limitation, bodily pain, general health, vitality, social function, emotional role limitation, mental health, plus a single item on the reported health transition over the last year. Each dimension is scored separately and then transformed to a 0 to 100 scale, with lower scores indicating poorer health. The physical and mental component categories are collapsed to produce two summary scores, the physical component score (PCS) and the mental component score (MCS). The questionnaire takes 5 to 10 minutes to complete and is self-administered. 

A conceptual model is the rationale for and description of the concepts that a measurement instrument is intended to assess and the interrelationships of those concepts. A measurement model is an instrument s scale and subscale structure and the procedures followed to create scale and subscale scores. An example is the well-defined conceptual and measurement models for the scales and scale structure of the SF-36. The SF-36 contains 36 items that cover nine theory-based health concepts. Eight of these health concepts are measured by multi-item scales. There is a clearly defined means of creating the individual scale scores and the physical and mental component summary scales. ... 

The goal of the present study was to examine the validity of PCA of multiple psychophysiological measures computed tiom heart period for use in mental workload assessment. Validity of the PCA components was examined in two ways (a) by comparing the autonomic space created tiom the PCA component scores to that ereated from PEP and RSA and (b) by the correlations between the sympathetic component and PEP and between the parasympathetic component and RSA. Both approaches provided some support for PCA component validity. 

While the brain levels of PAH in the children who scored low on the mental development index component of the BSlD-11 cannot be known, studies such as the aforementioned are valuable from a translational standpoint as they can assist in the design of molecular neurotoxicity studies. Mechanistic studies that utihze transgenic mouse models will facilitate the understanding of the molecular signaling events that give rise to the observed neurotoxic effects resulting from exposure to PAHs during development. The... 

A commonly used profile instrument is the Medical Outcomes Study 36-Item Short-Form Health Survey (SF-36). This instrument includes nine health concepts or scales (Table 2-3). The SF-36 can be self-administered or administered by a trained interviewer (face to face or via telephone). This instrument has several advantages. For example, it is brief (it takes about 5-10 minutes to complete), and its reliability and validity have been documented in many clinical situations and disease states. " A means of aggregating the items into physical (PCS) and mental (MCS) component summary scores is available." In addition, an abbreviated version of the SF-36 containing only 12 items (SF-12) has been introduced." However, the scale scores and mental and physical component summary scores derived from the SF-12 are based on fewer items and fewer defined levels of health and, as a result, are estimated with less precision and less reliability. The loss of precision and reliability in measurement can be a problem in small samples and/or with small expected effect sizes for an intervention. 

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