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Forensic podiatry

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Forensic podiatry

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Samenvatting

Although the ‘inkless’ shoe print kit is an approved forensic methodology for the collection of bare footprints, no previous research has considered whether bare footprints collected with the inkless shoe print kit are reliable for re-examination after a certain amount of time. In order to reach the aim of this study, multiple research questions were developed to be examined. In order to answer these research questions, multiple experiments were carried out. Bare footprints from the previous study treated paper versus thermal fax paper (appendix VIII) were used for re-examination by a second time scanning of the original bare footprints with a time range from 11-14 weeks. As a complemented study, the reliability of measuring bare footprints by the same participant and different participants on the same samples has been assessed.
Bare footprints were used from the previous treated paper versus thermal fax paper study. The images were scanned for the second time by the use of an Epson perfection 3490 PHOTO scanner (greyscale, 150 dpi). The images were stored as a Tiff image on a Packerd bell Easynote LV laptop with a backup on a verbatim external hard drive. The software GNU Image Manipulation Program (GIMP 2) was used to measure the bare footprints to establish the lengths of each toe from the furthest point of the heel, the width of de ball of the foot and the width of the heel of the foot. IBM SPSS Statistics 19 for windows was used to apply the statistical tests to the data.
The examination of dynamic changes in bare footprints during time showed a variety of increase and decrease of the bare footprint samples. Bare footprints scanned after 11 weeks overall showed less dynamic changes over time. Bare footprints scanned after 14 weeks showed high dynamic changes over time. The investigation of the reliability of measuring bare footprints suggest a high intra-rater reliability for bare footprints measurement by the same participant with an intraclass correlation coefficient (ICC) of at least 0,98 for all the measurements. Measurements taken by different participants using the same samples suggest a negative value for the ICC and Cronbach’s Alpha which can be due to negatively correlated data.

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OrganisatieAvans Hogeschool
OpleidingBiologie en Medisch Laboratoriumonderzoek-Breda
AfdelingATGM Academie voor de technologie van Gezondheid en Milieu
Datum2013-06-24
TypeBachelorscriptie
TaalEngels

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