![]() ![]() Specifically, these authors found several changes in gait patterns when participants were aware of the presence of observers. This has been reported in a small observational gait study of individuals with prosthetic devices. This type of performance bias can occur because participants may alter their behavior based on the knowledge they are being observed. This phenomenon is known as the Hawthorne Effect, and has been referred to more recently as participant reactivity. Biomechanists use calibrated equipment to objectively measure gait characteristics, but bias associated with human behavior during data collection is more difficult to control.īias can be introduced into a study when people know they are being monitored. Random allocation and blinding researchers and participants to treatments are ways to limit bias and validity threats. īias and threats to validity that may occur during research include study design, data collection, and data analysis and interpretation. However, until there is greater evidence of the reliability and validity of such technology, the laboratory setting remains the gold standard for assessing running gait mechanics. Ideally, runners would be measured in their natural running environments by using wearable sensors. However, there is a question of the ecological validity in this type of research due to the runner's awareness of being observed and analyzed. The majority of running gait analyses are conducted in a laboratory setting. Running, Dual-task, Physical therapy, Biomechanics Utilizing a distraction task with gait analyses, especially post-gait retraining, is feasible and recommended. However, both increases and decreases were found in cadence and foot angle in response to distraction. Runners who received footstrike retraining (FFS) did not alter foot angle or loadrates while distracted. Runners who received cadence retraining (CAD) did not alter cadence, but had increased loadrates when distracted. Two groups of runners were analyzed at 3 post-intervention time-points for changes in vertical loadrates, cadence, and footstrike pattern. The purpose of this study was to determine if runners who had recently undergone gait retraining altered their running mechanics while performing a cognitive distraction task. ![]() When assessing running mechanics in a laboratory setting, there is risk for performance bias by the participants. ![]()
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