Psychosocial and psychophysiological effects of human-animal interactions: the possible role of oxytocin.

Front Psychol · 2012 · PMC3408111 · PMID 22866043

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showed a trendno p-value reported

While the group observing the real aquarium showed a trend for lower heart rate and muscle tension as well as for an increase in skin temperature, none of the group comparisons reached statistical significance.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.