Video data were coded using a 5-second partial interval recording procedure, whereby a dog was noted as having been in an area if the dog’s head was present in that area at any time during each 5-second period. This was necessary because dogs were able to move rapidly throughout the room and could easily (and sometimes did) move through all 4 areas within 5 seconds. Much relevant data would have been lost had we not used a partial interval recording. We coded the presence of the head instead of the entire body because the dogs often straddled 2 areas; to avoid confusion when coding data, only the presence of the head was considered. Videos from 15 dogs were coded both by the experimenter and by a naïve observer to measure interrater reliability. Pearson correlation between the 2 raters for presence in areas 1-4 was 0.981 (P < 0.001), 0.567 (P ¼ 0.028), 0.989 (P < 0.001), and 0.99 (P < 0.001), respectively. The relatively low correlation in area 2 was because of 1 dog that straddled areas 1 and 2 for much of the coding period and whose actual placement was difficult to determine on the video. When correlations were analyzed without this dog, Pearson correlation for area 2 became 0.891 (P < 0.001).
Video data were coded using a 5-second partial interval recording procedure, whereby a dog was noted as having been in an area if the dog’s head was present in that area at any time during each 5-second period. This was necessary because dogs were able to move rapidly throughout the room and could easily (and sometimes did) move through all 4 areas within 5 seconds. Much relevant data would have been lost had we not used a partial interval recording. We coded the presence of the head instead of the entire body because the dogs often straddled 2 areas; to avoid confusion when coding data, only the presence of the head was considered. Videos from 15 dogs were coded both by the experimenter and by a naïve observer to measure interrater reliability. Pearson correlation between the 2 raters for presence in areas 1-4 was 0.981 (P < 0.001), 0.567 (P ¼ 0.028), 0.989 (P < 0.001), and 0.99 (P < 0.001), respectively. The relatively low correlation in area 2 was because of 1 dog that straddled areas 1 and 2 for much of the coding period and whose actual placement was difficult to determine on the video. When correlations were analyzed without this dog, Pearson correlation for area 2 became 0.891 (P < 0.001).
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