Influence of Velocity on Variability in Gait Kinematics: Implications for Recognition in Forensic Science

TY - JOUR

T1 - Influence of Velocity on Variability in Gait Kinematics

T2 - Implications for Recognition in Forensic Science

AU - Yang, Sylvia X M

AU - Larsen, Peter K

AU - Alkjær, Tine

AU - Lynnerup, Niels

AU - Simonsen, Erik B

N1 - © 2014 American Academy of Forensic Sciences.

PY - 2014/3/31

Y1 - 2014/3/31

N2 - Closed circuit television (CCTV) footage is often available from crime scenes and may be used to compare perpetrators with suspects. Usually, the footage comprises incomplete gait cycles at different velocities, making gait pattern identification from crimes difficult. This study investigated the concurrence of joint angles throughout a gait cycle at three different velocities (3.0, 4.5, 6.0 km/h). Six datasets at each velocity were collected from 16 men. A variability range VR throughout the gait cycle at each velocity for each joint angle for each person was calculated. The joint angles at each velocity were compared pairwise, and whenever this showed values within the VR of this velocity, the case was positive. By adding the positives throughout the gait cycle, phases with high and low concurrences were located; peak concurrence was observed at mid-stance phase. Striving for the same velocity for the suspect and perpetrator is recommended.

AB - Closed circuit television (CCTV) footage is often available from crime scenes and may be used to compare perpetrators with suspects. Usually, the footage comprises incomplete gait cycles at different velocities, making gait pattern identification from crimes difficult. This study investigated the concurrence of joint angles throughout a gait cycle at three different velocities (3.0, 4.5, 6.0 km/h). Six datasets at each velocity were collected from 16 men. A variability range VR throughout the gait cycle at each velocity for each joint angle for each person was calculated. The joint angles at each velocity were compared pairwise, and whenever this showed values within the VR of this velocity, the case was positive. By adding the positives throughout the gait cycle, phases with high and low concurrences were located; peak concurrence was observed at mid-stance phase. Striving for the same velocity for the suspect and perpetrator is recommended.

U2 - 10.1111/1556-4029.12490

DO - 10.1111/1556-4029.12490

M3 - Journal article

C2 - 24684582

SN - 0022-1198

VL - 59

SP - 1242

EP - 1247

JO - Journal of Forensic Sciences

JF - Journal of Forensic Sciences

IS - 5

ER -