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Development and Initial Validation of the Miranda Vocabulary Scale

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Law and Human Behavior

Abstract

Miranda vocabulary forms the essential foundation for Miranda comprehension and subsequent decisions to exercise or waive Miranda rights. The purpose of the current study is the development of the Miranda Vocabulary Scale (MVS), designed to evaluate key vocabulary words found in Miranda warnings and waivers across American jurisdictions. A preliminary list of MVS words was refined by expert ratings and by each word’s discriminability between failed and good Miranda comprehension. Miranda and other measures were collected at multiple sites on 376 pretrial defendants. With further refinements, the MVS is composed of 36 words with excellent scale homogeneity and interrater reliability (r = .99). It also demonstrated good convergent and discriminant validity for cognitive abilities and psychological impairment.

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Notes

  1. Other measures included: the Gudjonsson Suggestibility Scale (Gudjonsson, 1997), the Gudjonsson Confession Questionnaire-Revised (Gudjonsson & Sigurdsson, 1999), the Atypical Presentation Scale of the ECST-R (Rogers, Tillbrook, & Sewell, 2004), the Interrogation Acquiescence Scale (Harrison & Rogers, 2005), the Miranda Rights Scale (Rogers, 2005a), and the Slosson Oral Reading Test-Revision 3 (SORT-R3; Slosson & Nicholson, 2002).

  2. In surveying undergraduates, more than half confused the term “indigent” with “indicted” with reference to criminal suspects (Rogers, Shuman, & Drogin, 2008).

  3. A full description of the ordering of measures for each site is available upon request.

  4. As a preliminary analysis, we correlated hours after arrest with MVS scores for inmates at Grayson County Jail, which revealed no relationship (r = .02; p = .78).

  5. United States Court of Appeals for the Sixth Circuit has granted an en banc rehearing of this decision.

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Acknowledgments

This study was supported by two grants (#0418057 and #0615934) from Law and Social Sciences Program, National Science Foundation, to Richard Rogers as the principal investigator. Any opinions, findings, and conclusions, or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. The authors would like to express their gratitude to the administrators of the different facilities included in this investigation. We especially appreciate the unwavering support of Sheriff J. Keith Gary and Captain Kelli Stephens at Grayson County Jail for the last four years.

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Correspondence to Richard Rogers.

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Rogers, R., Hazelwood, L.L., Sewell, K.W. et al. Development and Initial Validation of the Miranda Vocabulary Scale. Law Hum Behav 33, 381–392 (2009). https://doi.org/10.1007/s10979-008-9159-3

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