Percentage of cues pecked and latency to peck data for screen-peck task 1 (no affect manipulation). Data are means where birds see 17 P cues, 2 NP cues, 2 M cues, 1 NN cues and 17 N cues per session. To calculate an average measure, the total latency (counted as 10s if the cue was not pecked) was divided by the number of trials in which a peck occurred. P and N latencies were only available for the last 3 sessions (percenatge pecked data was available for all 6 sessions).
Biotechnology and Biological Sciences Research Council