Basic reversal-learning capacity in flies suggests rudiments of complex cognition.

We found highly significant genetic variation in their baseline ability to learn.

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We used a multiple regression model (glm{stats}) in R, including genotype and day effects as covariates, modelled as factor variables, with marginal significance for each term estimated using Type II ANOVA (Anova{car}), with orthogonal contrasts appropriate for unordered factors, and a Poisson distribution.

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