We highly doubt the infants compensated to the point of “recovering symmetrical gait”. It just isn’t possible seeing as there was frank asymmetry in leg length. However, it is quite possible they accomodated quicker with a more reasonable compensation, that MAY have appeared to have less limp. We did not do the study, but over a beer we might guess that the investigators might agree that our verbiage is closer to accurate. None the less, cool stuff to cogitate. We are very appreciative of this study, there is something to take from this study.
“The stability of a system affects how it will handle a perturbation: The system may compensate for the perturbation or not. This study examined how 14-month-old infants-notoriously unstable walkers-and adults cope with a perturbation to walking. We attached a platform to one of participants’ shoes, forcing them to walk with one elongated leg. At first, the platform shoe caused both age groups to slow down and limp, and caused infants to misstep and fall. But after a few trials, infants altered their gait to compensate for the platform shoe whereas adults did not; infants recovered symmetrical gait whereas adults continued to limp. Apparently, adult walking was stable enough to cope with the perturbation, but infants risked falling if they did not compensate. Compensation depends on the interplay of multiple factors: The availability of a compensatory response, the cost of compensation, and the stability of the system being perturbed.”- From the Cole et all study (reference below)
- thoughts by Shawn Allen
Infant Behav Dev. 2014 Aug;37(3):305-14. doi: 10.1016/j.infbeh.2014.04.006. Epub 2014 May 20.Coping with asymmetry: how infants and adults walk with one elongated leg.Cole WG1, Gill SV2, Vereijken B3, Adolph KE4.