Based on your search, the query appears to relate to Wilk's Lambda , a multivariate measure used in statistical analyses, particularly in studies examining group differences (e.g., in ripening cheese or biological data). It is often used as a selection criterion in stepwise discriminant analysis to determine the addition or removal of variables.
Although you asked about "Wilk," recent studies also use PL animations to investigate biological motion perception. If you can provide more context, such as:
Used to classify data (e.g., cheese maturity, biological samples) based on canonical functions derived from variables.