For each trial, we scored the response of the bird during 180 s, corresponding to the broadcast of 90 s of continuous song and 90 s of post-playback observation.
We gained 100% agreement on whether the subject approached the sleeping room and a Pearson's correlation showed our duration measurements were also highly similar (Duration looking at sleeping room pre-playback, r = 0.992; Duration looking at sleeping room post-playback, r = 0.971), thus we had confidence the videos had been accurately coded.
As for PC4, we recorded significant time effects for PC5 across all three experiments, with animals pre-signal (minute 1) showing a range of grooming or walking behavior, but little or none of this behavior post-playback (there was no significant signal or signal x time interaction effects).
There were significant time effects for PC4 (relaxed) across all three experiments, with animals pre-signal (minute 1) showing a range of relaxing behavior, but little or none of this behavior post-playback (this was particularly noticeable in experiment 3 (Figure Sl).
The video observer measured the latency from the beginning of the playback presentation until the subject looked towards the speaker, and the duration of looking during the presentation period (240 s in total; i.e. 60 s of playback and 180 s of post-playback observation).
As the video appears to be in slow motion, the highly-technical work came in post-production since the playback runs at 24 fps, or one-fourth the speed the video was shot in, an old trick Yoka says is favored by filmmaker Spike Jonze (see Weezer's "Undone the Sweater Song").
The whip crack was most evocative; eating was reduced from 75% of time spent prior to playback to 6% following playback (post alarm stomp: 32%, raven call: 49%, hiss: 75%).
Besides the 45 million users, Keek has also seen over 667 million visits, offered up 12 billion page views, with 18 million total videos posted and 2.2 billion playbacks of said videos.
Now anyone can grab embed codes from public posts, and Facebook's added in-line video playback, and better mobile display.
Post hoc testing revealed that males reacted more to playbacks than females (t test: t612 = 3.29, P ≤ 0.001) and that both sexes showed an increased response to female food calls (t test: t612 = 2.14, P = 0.033).
