Fig 5. Log P/N response ratios for the first 40 responses following food plus magazine light presentations and magazine-light-only presentations in conditions when the magazine-light ratio was positively correlated with the food ratio (Condition 5, left panel), when the magazine-light ratio was negatively correlated with the food ratio (Condition 6, center panel), and when the magazine-light ratio was uncorrelated with the food ratio (Condition 7, right panel).
The data were averaged across the 6 pigeons.