A Comparison between Manual and Digital Measurements in Exemplar Bare Footprint Analysis

This study examined the role that bare footprint collection and measurement processes have on the Reel method of measurement in forensic podiatry and its use in the Criminal Justice System. Previous research suggested the Reel method of linear measurements was a valid and reliable measurement system for bare footprint analysis. Various collection systems have been used by studies to collect footprint data and both manual and digital measurement processes were utilized in forensic podiatry and other disciplines. This study contributes to the debate about collecting bare footprints; the techniques employed to quantify linear measurements and considered whether there were any differences between the methods of measurements employed. An inductive, quantitative paradigm used the Inkless Shoeprint Kit gathering procedure for footprint collection and the subsequent dynamic footprints subjected to Adobe Photoshop techniques of calculating the Reel linear variables as well as the traditional manual method of using a ruler and pen on an acetate sheet overlaid the original footprint. Statistical analyses using Paired-sample t tests were conducted to test hypotheses and compare data sets. Standard Error (SE) showed variation between feet and the findings provide support for the Reel study and measurement method. The study also suggests little difference between measurements using the two measurement methods although the digital system is preferred as it allows traceability of all aspects of the process compared to that of the manual method also allowing greater precision of measurements which may be required in the criminal justice system.