It has long been anecdotally observed that there can be a difference in physical dimensions between static and dynamic test impressions. The researchers have taken both static and dynamic test impressions from 90 pairs of shoes (360 test impressions). They will take five measurements (1800 measurements) from each impression to determine if this observation is accurate. In addition the researchers will attempt to determine if any difference is correlated with shoe style. The authors have broken each pair into one of three broad styles – flat bottom/continuous sole, non-continuous (shallowly recessed mid portion) athletic shoes and shoes/boots with a defined/stepped heel.

Chris Hamburg (Oregon State Police), David Kanaris (Alaska State Police), Sarah Bohne (Colorado Springs Police Department)