Fig. 2. Results from the `Kamin control' experiment with patterns and colours as
elements of the compound. (A) Pooled compound training data for all flies used
in this experiment. The final 2 min test period (i.e. minutes 14-16) of each
subgroup is depicted in B—E (N=103). (B) Compound control
(N=25). (C) Colours alone. T-patterns were replaced by four vertical
bars (N=28). (D) Patterns alone. Colour filters were removed
(N=25). (E) Nonsense compound. The contingency between patterns and
colours was reversed such that positive scores would indicate a correct colour
choice and negative scores a correct pattern choice (N=25).
Statistical analyses are the results of a Wilcoxon matched-pairs test against
zero: ***significant at P<0.001;
**significant at P<0.01; NS, not significant.
Cross-hatched columns, training; open columns, test period; shaded areas,
compound stimulus; unshaded areas, single stimulus. Values are means ±
S.E.M.
